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This guide is intended for network administrators familiar with IT
concepts and terminology.

Conventions

Table 1 lists conventions that are used throughout this guide.

Table 1

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Содержание 3CBLSG48

Страница 1: ...3Com Baseline Switch 2948 SFP Plus User Guide 3CBLSG48 www 3Com com Part Number 10016089 Rev AA Published July 2007 10016089 AA Front_matter fm Page 1 Tuesday July 3 2007 3 51 PM ...

Страница 2: ...on of any legend provided on any licensed program or documentation contained in or delivered to you in conjunction with this User Guide Unless otherwise indicated 3Com registered trademarks are registered in the United States and may or may not be registered in other countries 3Com and the 3Com logo are registered trademarks of 3Com Corporation Intel and Pentium are registered trademarks of Intel ...

Страница 3: ...ing device settings Managing Device Security Provides information for configuring both system and network security including traffic control ACLs and device access methods General System Information Provides information for configuring general system information including the user defined system name the user defined system location and the system contact person Configuring Ports Provides informat...

Страница 4: ...RP Configuring IGMP Snooping Query Provides information for configuring IGMP Snooping and IGMP query Configuring Spanning Tree Provides information for configuring Classic and Rapid Spanning Tree Configuring SNMP Provides information for configuring the Simple Network Management Protocol SNMP which provides a method for managing network devices Configuring Quality of Service Provides information d...

Страница 5: ...eader Portable Document Format PDF or HTML on the 3Com Web site http www 3Com com In addition to this guide other documentation available for the 3Com Baseline Switch 2948 includes Safety and Support Information Provides installation set up and regulatory compliance information Related Documentation Information Information that describes important note features or instructions Caution Information ...

Страница 6: ...tup Overview 10 Using the Command Line Interface CLI 14 Setting Up Web Interface Management 18 Setting Up SNMP Management V1 or V2 19 Default Users and Passwords 20 Upgrading Software using theCLI 20 2 USING THE 3COM WEB INTERFACE Starting the 3Com Web Interface 21 Understanding the 3Com Web Interface 23 Saving the Configuration 31 Resetting the Device 32 Restoring Factory Defaults 34 Logging Off ...

Страница 7: ... Access Control Lists 53 Viewing Broadcast Storm 80 5 GENERAL SYSTEM INFORMATION Viewing System Description 84 Configuring System Name Information 86 Configuring System Time 87 6 CONFIGURING PORTS Viewing Port Settings 90 Defining Port Settings 93 Viewing Port Details 95 7 AGGREGATING PORTS Viewing Link Aggregation 98 Configuring Link Aggregation 99 Modifying Link Aggregation 100 Removing Link Agg...

Страница 8: ...Port VLAN Settings 114 Removing VLANs 115 9 CONFIGURING IP AND MAC ADDRESS INFORMATION Defining IP Addressing 117 Configuring ARP Settings 118 Viewing ARP Settings 119 Defining ARP Settings 120 Removing ARP Entries 121 Configuring Address Tables 122 Viewing Address Table Settings 123 Viewing Port Summary Settings 125 Adding Entries into Address Tables 126 Defining Aging Time 128 Removing Address T...

Страница 9: ...Defining SNMP Communities 143 Removing SNMP Communities 145 Defining SNMP Traps 146 Removing SNMP Traps 147 13 Configuring quALITY OF SERVICES Viewing CoS Settings 150 Defining CoS 151 Defining Queuing Algorithm 152 Viewing CoS to Queue 153 Defining CoS to Queue 153 Viewing DSCP to CoS 155 Configuring DSCP to CoS 156 Configuring Trust Settings 157 Viewing Bandwidth Settings 158 Defining Bandwidth ...

Страница 10: ...MANAGING DEVICE DIAGNOSTICS Configuring Port Mirroring 178 Viewing Cable Diagnostics 181 A 3COM NETWORK MANAGEMENT 3Com Network Supervisor 184 3Com Network Director 185 3Com Network Access Manager 185 3Com Enterprise Management Suite 186 Integration Kit with HP OpenView Network Node Manager 186 B device specifications and features Related Standard 187 Environmental 187 Physical 187 Electrical 188 ...

Страница 11: ...96 E 3COM CLI REFERENCE GUIDE Getting Started with the Command Line Interface 199 CLI Commands 200 F GLOSSARy 210 G OBTAINING SUPPORT FOR YOUR 3COM PRODUCTS Register Your Product to Gain Service Benefits 216 Solve Problems Online 216 Purchase Extended Warranty and Professional Services 216 Access Software Downloads 217 Contact Us 217 Telephone Technical Support and Repair 217 REGULATORY NOTICES ...

Страница 12: ...oftware features and the following topics About the Switch 2948 Front Panel Detail LED Status Indicators System Specifications Installing the Switch Setting Up for Management Methods of Managing a Switch Switch Setup Overview Using the Command Line Interface CLI Setting Up Web Interface Management Setting Up SNMP Management V1 or V2 Default Users and Passwords Upgrading Software using the CLI ...

Страница 13: ...48 features the following advantages Full Gigabit speed access ports Jumbo frames Port security Link aggregation control protocol LACP Up to 256 VLANs Access control lists ACLs Port based mirroring Table 1 summarizes the hardware features supported by the Switch 2948 Table 1 Hardware Features About the Switch 2948 Feature Switch 2948 Addresses Up to 8 000 supported Auto negotiation Supported on al...

Страница 14: ...the IEEE Std 802 ID 1998 Edition Four traffic queues per port Ethernet Fast Auto negotiating 10 100 1000BASE T ports and Gigabit Ethernet Ports SFP Ethernet Ports Supports fiber Gigabit Ethernet long wave LX and fiber Gigabit Ethernet short wave SX transceivers in any combination Mounting 19 inch rack or standalone mounting Figure 1 shows the front panel of the Switch 2948 SFP Plus 48 Port unit Fi...

Страница 15: ...D flashes when the system has failed the POST OFF The switch is powered off 10 100 1000 Link Green The port works at the rate of 1000 Mbps BASE T Activity The LED flashes quickly when the port Ethemet port is sending or receiving data status Yellow The port works at the rate of 10 100 Mbps The LED flashes quickly when the port is sending or receiving data OFF The port is not connected 1000Base SFP...

Страница 16: ... 1 73 X 1 7 3 X 10 43 in H W D Weight 2 0 kg 4 4 lbs Console port One Console port Gigabit Ethernet ports 48 10 100 100 Mbps Ethernet ports on the front panel Four Gigabit SFP Combo ports AC Input voltage Rated voltage range 100 240 VAC 50 60 Hz Power consumption 70 W full load Operating temperature 0 to 40 C 32 to 113 F Relative humidity 10 to 90 non condensing Additional specifications can be fo...

Страница 17: ...ety and Regulatory Information ADVERTENCIA Informacion de seguridad Antes de instalar o ex traer cualquier componente del Switch o de realizar tareas de manten imiento debe leer la informacion de seguridad facilitada en el 3Com Switch Family Safety and Regulatory Information AVVERTENZA Informazioni di sicurezza Prima di installare o rimuovere qualsiasi componente dal Switch o di eseguire qualsiasi...

Страница 18: ...ve the efficiency of the switch and therefore the overall performance of your network This section explains the initial set up of the switch and the different methods of accessing the management software to manage a switch It covers the following topics Methods of Managing a Switch Switch Setup Overview Manually set the IP Address using the Console Port Viewing IP Information using the Console Por...

Страница 19: ... setting and viewing the IP address configuring user accounts upgrading switch firmware and more Refer to 3Com CLI Reference Guide on page 195 Methods of Managing a Switch Web Interface Management Each switch has an internal set of web pages that allow you to manage the switch using a Web browser remotely over an IP network see Figure 2 Figure 2 Web Interface Management over the Network Switch Ref...

Страница 20: ...station running the Simple Network Management Protocol SNMP as shown in Figure 3 For example you can use the 3Com Network Director software available from the 3Com website Figure 3 SNMP Management over the Network Refer to Setting Up SNMP Management V1 or V2 on page 19 SNMP Management ...

Страница 21: ...eady for management when it is in its default state The whole setup process is summarized in Figure 4 Detailed procedural steps are contained in the sections that follow In brief you need to Configure IP information manually for your switch or view the automatically configured IP information Prepare for your chosen method of management ...

Страница 22: ...s you must change the default password as soon as possible even if you do not intend to actively manage your switch For more information on default users and changing default passwords see Default Users and Passwords on page 20 Figure 4 Initial Switch Setup and Management Flow Diagram ...

Страница 23: ...fault IP address is listed on a label located on the rear of the switch If you use automatic IP configuration it is important that the IP address of the switch is static otherwise the DHCP server can change the switch s IP addresses and it will be difficult to manage Most DHCP servers allow static IP addresses to be configured so that you know what IP address will be allocated to the switch Refer ...

Страница 24: ... if You do not have a DHCP server on your network or You want to remove the risk of the IP address ever changing or Your DHCP server does not allow you to allocate static IP addresses Static IP addresses are necessary to ensure that the switch is always allocated the same IP information For most installations 3Com recommends that you configure the switch IP information manually This makes manageme...

Страница 25: ...on about the CLI refer to 3Com CLI Reference Guide This section describes how to connect to your switch through the Console port Prerequisites A workstation with terminal emulation software installed such as Microsoft Hyperterminal This software allows you to communicate with the switch using the console port directly Documentation supplied with the terminal emulation software The console cable RJ...

Страница 26: ... the other end of the cable to the workstation 2 Open your terminal emulation software and configure the COM port settings to which you have connected the cable The settings must be set to match the default settings for the switch which are 38 400 baud bits per second 8 data bits no parity 1 stop bit no hardware flow control Refer to the documentation that accompanies the terminal emulation softwa...

Страница 27: ...name and press Return The Password prompt displays 4 Press Return If you have logged on correctly Select menu option should be displayed 5 Enter the IP address and subnet mask for the switch as follows Select menu option ipSetup Enter configuration method auto manual manual Enter IP address 169 254 145 76 xxx xxx xxx xxx Enter subnet mask 255 255 0 0 mmm mmm mmm mmm Enter gateway IP address 0 0 0 ...

Страница 28: ...me and press Return 4 At the password prompt press Return If you have logged on correctly Select menu option is displayed 5 Enter Summary to view a summary of allocated IP addresses The following is an example of the display from the Summary command Select menu option summary IP Method Manual IP address 169 254 145 76 Subnet mask 255 255 0 0 Default gateway 0 0 0 0 Runtime version 00 00 29 Bootcod...

Страница 29: ... the web interface correctly use one of the following Web browser and platform combinations Table 4 Supported Web Browsers and Platforms Platform Browser Windows 2000 Windows XP Windows Vista Internet Explorer 6 Yes Yes Yes Internet Explorer 7 Yes Yes Yes Firefox 1 5 Yes Yes Yes Firefox 2 Yes Yes Yes Netscape 8 Yes Yes Yes For the browser to operate the web interface correctly JavaScript and Casca...

Страница 30: ...o manage in the URL locator for example in the following format http xxx xxx xxx xxx 5 At the login and password prompts enter admin as your user name and press Return at the password prompt or the password of your choice if you have already modified the default passwords The main Web interface page is displayed You can use any network management application running the Simple Network Management P...

Страница 31: ... setup This section describes how to upgrade software to your Switch from the Command Line Interface CLI Note You can also upgrade the software using the switch Web user interface See Upgrade the Firmware Image Bootcode can only be upgraded using the CLI 1 To download the runtime application file enter Select menu option upgrade TFTP Server Address 0 0 0 0 File Name bprxx_yy_zz bin Then follow the...

Страница 32: ...ed and access the switch concurrently Access levels provide read or read write permissions to users for configuring the switch Users and access levels are described in Configuring System Access Section Login information is always handled in the local database A unique password is required from each user Two access levels exist on the 3Com Web Interface Management access level Provides the user wit...

Страница 33: ...evice IP address in the address bar and press Enter The Enter Network Password Page opens Figure 6 Enter Network Password Page 3 Enter your user name and password The device default factory settings is configured with a User Name that is admin and a password that is blank Passwords are case sensitive 4 Click Login The 3Com Web Interface Home Page opens Accessing the 3Com Web Interface ...

Страница 34: ...ews Tab View Provides the device summary configuration located at the top of the home page Tree View Provides easy navigation through the configurable device features The main branches expand to display the sub features Port Indicators Located under the Device View at the top of the home page the port indicators provide a visual representation of the ports on the front panel ...

Страница 35: ...ription 1 Tree View Tree View provides easy navigation through the configurable device features The main branches expand to display the sub features 2 Tab View The Tab Area enables navigation through the different device features Click the tabs to view all the components under a specific feature 3 Web Provides access to online help and contains Interface information about Information the Web Inter...

Страница 36: ...for adding modifying and deleting configuration parameters Device Representation The 3Com Web Interface Home Page contains a graphical panel repre sentation of the device that appears within the Device View Tab To access the Device Representation 1 Click Device Summary Device View Figure 9 Device Representation 2 By selecting a specific port with your mouse you can view the Detail port Setup and S...

Страница 37: ...figuration Buttons Using the Web Interface Management Buttons Button Button Name Description Create Creates configuration entries Apply Applies configuration changes to the device Delete Deletes configuration settings Table 8 3Com Web Interface Information Tabs Tab Tab Name Description Help Opens the online help Logout Logs the user out and terminates the current session ...

Страница 38: ...ewing Configuration Information Adding Configuration Information Modifying Configuration Information Removing Configuration Information Viewing Configuration Information To view configuration information 1 Click Port Administration Summary The Port Settings Sum mary Page opens Figure 10 Port Settings Summary Page Using Screen and Table Options ...

Страница 39: ...to add User defined information to specific 3Com Web Interface pages For example to configure IP Setup 1 Click Administration IP Setup The IP Setup Page opens Figure 11 IP Setup Page 2 Enter the requisite information in the text field 3 Click Apply The IP information is configured and the device is updated ...

Страница 40: ... INTERFACE 29 Modifying Configuration Information 1 Click Administration System Access Modify The System Access Modify Page opens Figure 12 System Access Modify Page 2 Modify the fields 3 Click Apply The access fields are modified ...

Страница 41: ...Configuration Information 1 Click Administration System Access Remove The System Ac cess Remove Page opens Figure 13 System Access Remove Page 2 Select the user account to be deleted 3 Click Remove The user account is deleted and the device is up dated ...

Страница 42: ...on tab allows the latest configuration to be saved to the flash memory To save the device configuration 1 Click Save Configuration The Save Configuration Page opens Figure 14 Save Configuration Page A message appears The operation will save your configuration Do you wish to continue 2 Click OK A message appears Configuration is saved to flash memory successfully The configuration is saved ...

Страница 43: ...ation from being lost use the Save Con figuration Page to save all user defined changes to the flash memory before resetting the device To reset the device 1 Click Administration Reset The Reset Page opens Figure 15 Reset Page 2 Click Reboot A confirmation message is displayed 3 Click OK The device is reset and a prompt for a user name and password is displayed ...

Страница 44: ...CHAPTER 2 USING THE 3COM WEB INTERFACE 33 Figure 16 User Name and Password Page 4 Enter a user name and password to reconnect to the web interface ...

Страница 45: ...et Page opens Figure 17 Reset Page The Reset Page contains the following fields Initialize with Current IP Address Resets the device with the factory default settings but maintains the current IP Address subnet mask and default gateway address Initialize with Default IP Address Resets the device with the factory default settings including the factory default IP Address 2 Click the Initialize butto...

Страница 46: ...APTER 2 USING THE 3COM WEB INTERFACE 35 Logging Off the Device To log off the device 1 Click Logout The Logout Page opens 2 The following message appears 3 Click OK The 3Com Web Interface Home Page closes ...

Страница 47: ...ge and the Color Keys page The Device Summary Page displays general information including the system name location and contact the system MAC address System Object ID System Up Time and software boot and hardware versions To view the Device Summary Settings 1 Click Device Summary The Device Summary Page opens Figure 18 Device Summary Page Viewing Device Settings ...

Страница 48: ...e vendor s authoritative identification of the network management subsystem contained in the entity MAC Address Displays the device MAC address System Up Time Displays the amount of time since the most recent device reset The system time is displayed in the following format Days Hours Minutes and Seconds For example 41 days 2 hours 22 minutes and 15 seconds Software Version Displays the installed ...

Страница 49: ...Key Page opens Figure 19 Color Key Page Viewing Color Keys The Color Key Page contains the following fields RJ45 Displays the port status of the RJ45 connections which are the physical interface used for terminating twisted pair type cable SFP Displays the port status of the Small Form Factor SFP optical transmitter modules that combine transmitter and receiver functions ...

Страница 50: ...etected Yellow Lower speed on 10 100 1000M port Green Maximum speed 10 100 1000M RJ45 or RJ45 SFP Indicates that a link was detected Light Blue SX LX SFP Indicates that a link was detected Light Gray Port has been set to inactive by User or Protocol Dark Blue Port has been selected by user Red Port or Transceiver has failed POST or Transceivers not recognized ...

Страница 51: ...g system access defining RADIUS authentication port based authentication and defining access control lists This section includes the following topics Configuring System Access Defining RADIUS Clients Defining Port Based Authentication 802 1X Defining Access Control Lists Viewing Broadcast Storm ...

Страница 52: ... information is managed in the local database A unique password is required from each user Two access levels exist on the 3Com Web Interface Management access level Provides the user with read write access There is always one management level user configured for the switch The factory default is user name admin with no Password Monitor access level Provides the user with read only system access Th...

Страница 53: ... Access Summary Page Viewing System Access Settings The System Access Summary Page contains the following fields User Name Displays the user name The possible predefined field value is Admin Displays the predefined Administrative user name Access Level Displays the user access level The lowest user access level is Monitor and the highest is Management Management Provides the user with read and wri...

Страница 54: ...ge Defining System Access The System Access Setup Page contains the following fields User Name Defines the user name Access Level Defines the user access level The lowest user access level is Monitor and the highest is Management Management Provides users with read and write access rights Monitor Provides users with read access rights Password Defines the user password User passwords can contain u...

Страница 55: ...ns the following fields User Name Displays the user name Access Level Displays the user access level The lowest user access level is Monitoring and the highest is Management Management Provides users with read and write access rights Monitor Provides users with read access rights Password Modify Changes a password for an existing user Password Defines the local user password Local user pass words ...

Страница 56: ...ove Page The System Access Remove Page contains the following fields Remove User s Select user s from the list below to be removed User Name Displays the user name Access Level Displays the user access level The lowest user access level is Monitoring and the highest is Management Management Provides users with read and write access rights Monitoring Provides users with read access rights 2 Select ...

Страница 57: ...lt parameters are not defined the system default values are applied to newly defined RADIUS servers Monitor users have no access to this page To configure the RADIUS client 1 Click Security RADIUS Client Setup The Radius Client Setup Page opens Figure 24 Radius Client Setup Page The Radius Client Setup Page contains the following fields Primary Server Defines the RADIUS Primary Server authenticati...

Страница 58: ...f time in seconds the device waits for an answer from the RADIUS server before retrying the query or switching to the next server Possible field values are 1 30 The default value is 3 Dead Time Defines the default amount of time in minutes that a RADIUS server is bypassed for service requests The range is 0 2000 The default value is 0 Key String Defines the default key string used for authenticati...

Страница 59: ... system access Supplicants Specifies the host connected to the authenticated port requesting to access the system services Authentication Server Specifies the server that performs the authentication on behalf of the authenticator and indicates whether the supplicant is authorized to access system services Port based authentication creates two access states Controlled Access Permits communication b...

Страница 60: ...of interfaces User Name Displays the supplicant user name Current Port Control Displays the current port authorization state Guest VLAN Indicates whether an unauthorized port is allowed to join the Guest VLAN The possible field values are Enabled Enables an unauthorized port to join the Guest VLAN Disabled Disables an unauthorized port to join the Guest VLAN Periodic Reauthentication Enables perio...

Страница 61: ...mination Cause Indicates the reason for which the port authentication was terminated 2 Click Apply Port Authentication is enabled and the device is up dated The 802 1X Setup Page contains information for configuring 802 1X global settings on the device and defining specific 802 1X setting for each port individually Monitor users have no access to this page To configure 802 1X Settings 1 Click Secu...

Страница 62: ...vides port authentication using the RADIUS server RADIUS None Provides port authentication first using the RADIUS server If the port is not authenticated then no authentication method is used and the session is permitted None Indicates that no authentication method is used to authenticate the port Enable Guest VLAN Provides limited network access to authorized ports If a port is denied network acc...

Страница 63: ...ovide authentication services to the client through the interface Guest VLAN Specifies whether the Guest VLAN is enabled on the port The possible field values are Enabled Enables using a Guest VLAN for unauthorized ports If a Guest VLAN is enabled the unauthorized port automatically joins the VLAN selected from the Guest VLAN ID dropdown list Disabled Disables Guest VLAN on the port This is the de...

Страница 64: ...be defined as ACEs Source Port IP Address and Wildcard Mask Filters the packets by the Source port IP address and wildcard mask Destination Port IP Address and Wildcard Mask Filters the packets by the Source port IP address and wildcard mask ACE Priority Filters the packets by the ACE priority Protocol Filters the packets by the IP protocol DSCP Filters the packets by the DiffServ Code Point DSCP ...

Страница 65: ...Summary Page displays information regarding MAC Based ACLs configured on the device Ports are reactivated from the Interface Configuration Page To view MAC Based ACLs 1 Click Device ACL MAC Based ACL Summary The MAC Based ACL Summary Page opens Figure 27 MAC Based ACL Summary Page ...

Страница 66: ...ination Address Indicates the destination MAC address Destination Mask Indicates the destination MAC address Mask VLAN ID Matches the packet s VLAN ID to the ACE The possible field values are 1 to 4094 CoS Classifies traffic based on the CoS tag value CoS Mask Displays the CoS mask used to filter CoS tags Ethertype Provides an identifier that differentiates among various types of protocols Action ...

Страница 67: ...Based ACL Setup Page opens Figure 28 MAC Based ACL Setup Page The MAC Based ACL Setup Page contains the following fields Selection ACL Lists previously defined Access Control Lists Create ACL Create a new user defined MAC based ACL Add Rules to ACL Priority Indicates the ACE priority which determines which ACE is matched to a packet on a first match basis The possible field values are 1 65535 Sour...

Страница 68: ...tion MAC ad dress to which packets are addressed to the ACE Destination Mask Indicates the destination MAC Address wildcard mask Wildcards are used to mask all or part of a destination MAC address Wildcard masks specify which bits are used and which are ignored A wildcard mask of FF FF FF FF FF FF indicates that no bit is important A wildcard mask of 00 00 00 00 00 00 indicates that all bits are i...

Страница 69: ...e CoS mask used to classify network traffic Ethertype Provides an identifier that differentiates among various types of protocols Action Indicates the ACL forwarding action The options are as follows Permit Forwards packets which meet the ACL criteria Deny Drops packets which meet the ACL criteria 2 Define the fields 3 Click Apply The Rule Setup settings are configured and the device is updated ...

Страница 70: ...ge contains the following fields Select ACL Selects the ACL to be bound Select Rule Indicates the rule for which Access Control Entries are defined Modify Priority Indicates the rule priority which determines which rule is matched to a packet on a first match basis Source MAC Address Matches the source MAC address to which packets are addressed to the ACE Source Mask Indicates the source MAC Addre...

Страница 71: ... used and which are ignored A wildcard mask of FF FF FF FF FF indicates that no bit is important A wildcard mask of 00 00 00 00 00 00 indicates that all bits are important For example if the destination MAC address is E0 3B 4A C2 CA E2 and the wildcard mask is 00 00 00 00 00 FF the first five bytes of the MAC are used while the last byte is ignored For the destination MAC address 0 3B 4A C2 CA E2 ...

Страница 72: ...emove The MAC Based ACL Remove Page opens Figure 30 MAC Based ACL Remove Page The MAC Based ACL Remove Page contains the following fields ACL Name Contains a list of the MAC based ACLs Remove ACL Enables the ACL to be removed Priority Indicates the rule priority which determines which rule is matched to a packet on a first match basis 2 Define the fields 3 Click Apply The Rule Setup settings are c...

Страница 73: ...FF Destination Address Matches the destination MAC address to which packets are addressed to the ACE Destination Mask Indicates the destination MAC Address wildcard mask Wildcards are used to mask all or part of a destination MAC address Wildcard masks specify which bits are used and which are ignored A wildcard mask of FF FF FF FF FF FF indicates that no bit is important A wildcard mask of 00 00 ...

Страница 74: ...thertype Provides an identifier that differentiates among various types of protocols Action Indicates the ACL forwarding action The options are as follows Permit Forwards packets which meet the ACL criteria Deny Drops packets which meet the ACL criteria 2 Select the ACL Name to be deleted 3 Select the ACL to be removed from the table 4 Click the Remove checkbox 5 Click Apply The selected ACLs are ...

Страница 75: ...Page The IP Based ACL Summary Page contains the following fields ACL Name Contains a list of the IP Based ACLs Priority Indicates the ACE priority which determines which ACE is matched to a packet on a first match basis The possible field values are 1 65535 with 1 being the highest priority Protocol Indicates the protocol in the ACE to which the packet is matched Source Port Indicates the source p...

Страница 76: ...ce IP address mask Destination Address Matches the destination IP address to which packets are addressed to the ACL Destination Mask Indicates the destination IP address mask DSCP Matches the packet DSCP value to the ACL Either the DSCP value or the IP Precedence value is used to match packets to ACLs IP Precedence Indicates matching IP precedence with the packet IP precedence value Action Indicat...

Страница 77: ...osed of access control entries ACEs that are made of the filters that determine traffic classifications The total number of ACEs that can be defined in all ACLs together is 128 Monitor users have no access to this page To configure IP Based Access Control Lists 1 Click Device ACL IP Based ACL Setup The IP Based ACL Setup Page opens Figure 32 IP Based ACL Setup Page The IP Based ACL Setup Page cont...

Страница 78: ...re selected in the Protocol list The field value is either user defined or Any If Any is selected the IP based ACL is applied to any destination port TCP Flags If checked enables configuration of TCP flags matched to the packet The possible fields are Urg Urgent pointer field significant The urgent pointer points to the sequence number of the octet following the urgent data Ack Acknowledgement fie...

Страница 79: ...rce IP address wildcard mask Wildcard masks specify which bits are used and which bits are ignored A wildcard mask of 255 255 255 255 indicates that no bit is important A wildcard mask of 0 0 0 0 indicates that all the bits are important For example if the source IP address is 149 36 184 198 and the wildcard mask is 0 0 0 255 the first three bytes of the IP address are matched while the last eight...

Страница 80: ...dcard masks specify which bits are used and which bits are ignored A wildcard mask of 255 255 255 255 indicates that no bit is important A wildcard mask of 0 0 0 0 indicates that all bits are important For example if the destination IP address 149 36 184 198 and the wildcard mask is 0 0 0 255 the first three bytes of the IP address are matched while the last eight bits are ignored For the destinat...

Страница 81: ...value to the ACE Either the DSCP value or the IP Precedence value is used to match packets to ACLs Action Indicates the ACL forwarding action The options are as follows Permit Forwards packets which meet the ACL criteria Deny Drops packets which meet the ACL criteria 2 Select an ACL from the ACL Name drop down list 3 Define the rule setup fields 4 Click Apply The Rule Setup settings are configured...

Страница 82: ...L Selects the ACL to be modified Modify Rule Priority Defines the ACL priority ACLs are checked on the first fit basis The ACL priority defines the ACL order in the ACL list Protocol Indicates the protocol in the ACE to which the packet is matched Select from List Selects a protocol from a list on which ACE can be based Protocol ID Select a protocol ID from a list on which ACE can be based Source ...

Страница 83: ...ion between the sender and receiver Syn Synchronize Initial Sequence Numbers ISNs This is used to initialize a new connection Fin Finish This indicates there is no more data from the sender This marks a normal closing of the session between the sender and receiver For each TCP flag the possible field values are Set Enables the TCP flag Unset Disables the TCP flag Don t Care Does not check the pack...

Страница 84: ...e important For example if the destination IP address 149 36 184 198 and the wildcard mask is 255 255 0 0 the first two bytes of the IP address are used while the last two bytes are ignored Match DSCP Matches the packet DSCP value to the ACL Either the DSCP value or the IP Precedence value is used to match packets to ACLs Match IP Precedence Matches the packet IP Precedence value to the ACE Either...

Страница 85: ...age contains the following fields ACL Name Contains a list of the IP based ACLs Remove ACL Removes an ACL The possible field values are Checked Removes the selected IP based ACL Unchecked Maintains the IP based ACL Priority Indicates the ACL priority which determines which ACL is matched to a packet on a first match basis The possible field values are 1 65535 Protocol Indicates the protocol in the...

Страница 86: ... Indicates the destination IP address mask DSCP Matches the packet DSCP value to the ACL Either the DSCP value or the IP Precedence value is used to match packets to ACLs IP Precedence Indicates matching IP Precedence with the packet IP precedence value Action Indicates the ACL forwarding action The options are as follows Permit Forwards packets which meet the ACL criteria Deny Drops packets which...

Страница 87: ...interfaces To view ACL Binding 1 Click Device ACL ACL Binding Summary The ACL Binding Summary Page opens Figure 35 ACL Binding Summary Page The ACL Binding Summary Page contains the following fields Interface Displays the port or LAG number to which the ACL is bound ACL Name Displays the name of ACL which is bound to a selected port ...

Страница 88: ...L Binding Setup Page allows the network administrator to bind specific ports to MAC or IP Based ACLs The monitor user has no access to this page To define ACL Binding 1 Click Device ACL ACL Binding Setup The ACL Binding Setup Page opens Figure 36 ACL Binding Setup Page ...

Страница 89: ...s an Access Control List to a port or LAG MAC based ACL Displays the MAC based ACL to which the interface is assigned IP based ACL Displays the IP based ACL to which the inter face is assigned Select ACL Contains a list of previously defined Access Control Lists to which the port or LAG can be bound To bind an ACL to a LAG the ACL should be bound to its port members 2 Define the relevant fields 3 ...

Страница 90: ...To remove ACL Binding 1 Click Device ACL ACL Binding Remove The ACL Binding Remove Page opens Figure 37 ACL Binding Remove Page The ACL Binding Remove Page contains the following fields Interface Displays the port interface to which the ACL is bound ACL Name Displays the name of ACL to be removed from the selected port 2 Select an ACL to be removed 3 Click Apply The selected ACLs are removed and t...

Страница 91: ...f an excessive amount of broadcast messages simultaneously transmitted across a network by a single port Forwarded message responses are heaped onto the network straining network resources or causing the network to time out Broadcast Storm is enabled for all Gigabit ports by defining the packet type and the rate the packets are transmitted The system measures the incoming Broadcast and Multicast f...

Страница 92: ...llowing fields Port Indicates the selected port number Broadcast mode Indicates the packet types for the storming control The possible mode values are Disabled Disables storming control on the selected port Broadcast Enables broadcast control on the selected port Broadcast Multicast Enables broadcast and multicast control the selected port Broadcast Rate Threshold Indicates the maximum rate packet...

Страница 93: ...torm Modify The Broadcast Storm Modify Page opens Figure 39 Broadcast Storm Modify Page The Broadcast Storm Modify Page contains the following fields Broadcast Mode Indicates if forwarding Broadcast packet types is enabled on the interface Disabled Disables broadcast control on the selected port Broadcast Enables broadcast control on the selected port Broadcast Multicast Enables broadcast and mult...

Страница 94: ...roadcast Multicast packets are forwarded The range is 10 500 000 The default value is 100 Select Port s Indicates the ports to be configured Select All Allows the user to assign the Broadcast Mode to all ports Select None Removes the ports selected 2 Define the relevant fields 3 Click Apply Broadcast Storm is defined and the device is updated ...

Страница 95: ...System Description Configuring System Name Information Configuring System Time The Device View Page displays parameters for configuring general device information including the system name MAC Address software and hardware versions and more 1 Click Device Summary The Device View Page opens Figure 40 Device View Page Viewing System Description ...

Страница 96: ...s the 3Com device model number Not editable System Object ID Displays the vendor s authoritative identification of the network management subsystem contained in the entity Not editable MAC Address Displays the device MAC address Not editable System Up Time Displays the amount of time since the device was reset Software Version Displays the installed software version number Boot Version Displays th...

Страница 97: ...e 1 Click Administration System Name The System Name Page opens Figure 41 System Name Page Configuring System Name Information The System Name Page includes the following fields System Name Defines the user defined device name The field range is 0 160 characters System Location Defines the location where the system is currently running The field range is 0 160 characters System Contact Defines the...

Страница 98: ... to Saving the Configuration on page 31 Configuring System Time The System Time Setup Page contains fields for defining system time parameters for the local hardware clock Daylight Savings Time can be enabled on the device Monitor users have limited permissions on this page Country specific times need to be added manually To configure the System Time 1 Click Administration System Time The System T...

Страница 99: ... 1 00 am on the last Sunday in October The European option applies to EU members and other European countries using the EU standard Use NTP Server Use the Simple Network Time Protocol to get the time from the time server IP Address The IP address of the time server Polling Interval The time interval in minutes at which the switch synchronizes the time from the time server Last Successful NTP Conne...

Страница 100: ...e or disable automatic DST option 4 Manually define the related fields for NTP server or local date and time 5 Click Apply The device is updated with the time settings 6 Be sure to save your configuration or the changes will be lost when the switch is rebooted To save the configuration refer to Saving the Configuration on page 31 ...

Страница 101: ...he port speed to 10 100 1000 and the Duplex mode to Half admin speed is 10 100 1000 half and no advertisement Setting the port speed to 10 100 1000 and the Duplex mode to Full admin speed is 10 100 1000 full and no advertisement Setting the port speed to 10 100 1000 and the Duplex mode to Auto admin speed is Admin Advertisement 10 100 1000 full and half Setting the port speed to Auto and Duplex mo...

Страница 102: ...rt Indicates the selected port number Port Status Indicates whether the port is currently operational or non operational The possible field values are Enabled Indicates the port is enabled Disabled Indicates the port is disabled Flow Control Displays the flow control status on the port Operates when the port is in full duplex mode The possible field values are Enabled Enables flow control on the p...

Страница 103: ...ured to auto negotiation Duplex Displays the port duplex mode This field is configurable only when auto negotiation is disabled and the port speed is set to 10M or 100M or 1000M per second This field cannot be configured on LAGs The possible field values are Full The interface supports transmission between the device and its link partner in both directions simultaneously Half The interface support...

Страница 104: ...Page Defining Port Settings The Port Administration Setup Page contains the following fields Port State Defines the port state The possible values are No Change Retains the current port status Enabled Enables the port Disabled Disables the port Flow Control Displays the flow control status on the port Operates when the port is in full duplex mode The possible field values are Enabled Enables flow ...

Страница 105: ...nes the port duplex mode This field is configurable only when auto negotiation is disabled This field cannot be configured on LAGs The possible field values are Auto Use to automatically configure the port Full The interface supports transmission between the device and its link partner in both directions simultaneously Half The interface supports transmission between the device and the client in o...

Страница 106: ...s the following fields Select a Port Displays the current port settings Port State Indicates the port state The possible field values are Enabled Enables the port Disabled Disables the port PVID Indicates VLAN ID of this port for untagged packets Flow Control Displays the flow control status on the port Operates when the port is in full duplex mode The possible field values are Enabled Enables flo...

Страница 107: ...port The actual speed will show in brackets if the link is up The value in the bracket indicates the current operating speed Duplex Displays the port duplex mode This field is configurable only when auto negotiation is disabled This field cannot be configured on LAGs The possible field values are Auto Use to automatically configure the port The actual duplex will show in brackets if the link is up...

Страница 108: ...are part of a tagged VLAN inherit the existing VLAN tags Auto negotiation mode is configured on the port The port is in full duplex mode All ports in the LAG have the same ingress filtering and tagged modes All ports in the LAG have the same back pressure and flow control modes All ports in the LAG have the same priority All ports in the LAG have the same transceiver type The device supports up to...

Страница 109: ...view Link Aggregation 1 Click Ports Link Aggregation Summary The Link Aggregation Summary Page opens Figure 46 Link Aggregation Summary Page The Link Aggregation Summary Page includes the following fields Group ID Displays the Link Aggregated Group ID Ports Displays the member ports included in the specified LAG Type Displays the type of link aggregation for the Group ID Manual A static link aggre...

Страница 110: ...e 1 Click Ports Link Aggregation Create The Link Aggregation Create Page opens Figure 47 Link Aggregation Create Page The Link Aggregation Create Page includes the following fields Enter aggregation Group ID Displays the group ID The range is 1 8 groups Select ports for the new aggregation Displays the ports for which the link aggregation parameters are defined Blue Displays a member of the aggreg...

Страница 111: ... and the device is updated The Link Aggregation Modify Page optimizes port usage by linking a group of ports together to form a single LAG Aggregating ports multiplies the bandwidth between the devices increases port flexibility and provides link redundancy Monitor users have no access to this page To modify Link Aggregation 1 Click Ports Link Aggregation Modify The Link Aggregation Modify Page op...

Страница 112: ...ion The selected or deselected ports are color coded as follows Blue Displays a member of the modified aggregation White Not a member of any aggregation Grey Displays a member of an existing aggregation or VLAN Summary Group ID Displays the Link Aggregated Group ID Type Displays the type for link aggregation type the Group ID Member Ports Displays the ports configured to the LAG 2 Define the field...

Страница 113: ...age Removing Link Aggregation The Link Aggregation Remove Page includes the following fields Select Aggregation s to Remove Displays the Link Aggregation table Each row corresponds to a Link Aggregated Group ID The fields in the table are Group ID Displays the Link Aggregated Group ID Type Displays the Link Aggregation type Member Ports Displays the ports for which the link aggregation parameters ...

Страница 114: ...ds for viewing LACP LAGs 1 Click Port LACP Summary The LACP Summary Page opens Figure 50 LACP Summary Page Viewing LACP The LACP Summary Page contains the following fields Port Displays the port number Status Displays the administrative status of the port Enabled LACP is enabled on the port Disabled LACP is disabled on the port Port Priority Displays the LACP priority value for the port The field ...

Страница 115: ...t up manually or automatically established by enabling LACP on the relevant links Aggregate ports can be linked into link aggregation port groups The LACP Setup Page contains the field to configure the system priority 1 Click Port LACP Setup The LACP Setup Page opens Figure 51 LACP Setup Page The LACP Setup Page contains the following field System priority Specifies system priority value The field...

Страница 116: ...e 52 LACP Port Setup Page Defining LACP Port Status Displays the administrative LACP function The possible field values are Disabled Disables the LACP function on the selected ports Enabled Enables the LACP function on the selected ports Port Priority Displays the LACP priority value for the port The field range is 0 65535 Select Ports Displays the port number to which timeout and priority values ...

Страница 117: ...cal LAN segment to which they are attached VLANs allow network traffic to flow more efficiently within subgroups VLANs use software to reduce the amount of time it takes for network changes additions and moves to be implemented VLANs restrict traffic within the VLAN VLAN1 is the management VLAN You can only manage the switch through a port that is an untagged member of VLAN1 VLANs have no minimum ...

Страница 118: ...is the default VLAN All ports are untagged members of VLAN1 by default If any port becomes an untagged member of a different VLAN then the port is removed from untagged membership of VLAN1 For example If port 24 is made an untagged member of VLAN 5 the port will no longer be a member of VLAN1 However if the port is made an tagged member of VLAN5 it still re mains untagged in VLAN1 A port can only ...

Страница 119: ...ng information Select a VLAN to display Selects a VLAN to be display Membership Type Displays the membership type for each VLAN The possible field values are Untagged Indicates the interface is an untagged member of the VLAN Tagged Indicates the interface is a tagged member of a VLAN VLAN tagged packets are forwarded by the interface The packets contain VLAN information Not a Member Indicates the ...

Страница 120: ...Figure 54 VLAN Port Detail Page Viewing VLAN Port Details The VLAN Port Detail Page contains the following information Select Port Selects the port to be displayed Untagged membership Indicates the port is an untagged member of the VLAN Tagged membership Indicates the port is a tagged member of a VLAN VLAN tagged packets are forwarded by the interface The packets contain VLAN information ...

Страница 121: ...ss to this page To create VLANs 1 Click Device VLAN Setup The VLAN Setup Page opens Figure 55 VLAN Setup Page Creating VLANs The VLAN Setup Page contains the following fields Create VLAN IDs Creates a VLAN ID ID Displays the VLAN ID Name Displays the user defined VLAN name Rename VLAN 2 Enter a VLAN Number 3 Click Create The VLANs are configured and the device is updated ...

Страница 122: ...VLANs 1 Click Device VLAN Rename The VLAN Rename Page opens Figure 56 VLAN Rename Page The VLAN Rename Page contains the following fields Selected ID Displays the selected VLAN ID Enter new Name Renames the user defined VLAN name To rename a VLAN 1 Highlight a VLAN to be renamed from the VLAN list 2 Enter the new name for the VLAN 3 Click Rename The VLAN is renamed and the device is updated ...

Страница 123: ...manager to change VLAN membership The monitor users have no access to this page To edit VLAN Settings 1 Click Device VLAN Modify VLAN The Modify VLAN Page opens Figure 57 Modify VLAN Page The Modify VLAN Page contains the following fields Select a VLAN to Modify Select a VLAN name to be displayed ...

Страница 124: ...ets contain VLAN information Not a Member Indicates the interface is not a member of the VLAN Not Available for Selection Indicates the interface is not available for selection Select All Allows the user to select all ports to be added to the VLAN Select None Removes the ports selected To add ports to a VLAN 1 Select a VLAN to modify 2 Select the membership type for the selected port 3 Select port...

Страница 125: ... Page The Modify VLAN Port Page contains the following fields Select a Port Selects a port to be modified Select Membership Type Displays the membership type for eachVLAN The possible field values are Tagged Indicates the interface is a tagged member of a VLAN VLAN tagged packets are forwarded by the interface The packets contain VLAN information Untagged Indicates the interface is an untagged mem...

Страница 126: ...etting in the tagged membership of all the existing VLANs 2 Select a port 3 Select Membership type 4 Enter VLAN ID to be assigned to the port 5 Click Apply The VLANs are configured and the device is updated The VLAN Remove Page allows the network administrator to remove VLANs The monitor users have no access to this page 1 Click Device VLAN Remove The VLAN Remove Page opens Figure 59 VLAN Remove P...

Страница 127: ...s the following fields ID Displays the VLAN ID Name Displays the user defined VLAN name Select All Allows the user to select the entire table to be removed 2 Select the VLAN ID to be deleted 3 Click Remove The selected VLANs are deleted and the device is updated ...

Страница 128: ...dressing Configuring ARP Settings Configuring Address Tables Defining IP Addressing The IP Setup Page contains fields for assigning an IP address The default gateway is erased when the Default IP address is modified Packets are forwarded to the default gateway when sent to a remote network The monitor user has no access to this page 1 Click Administration IP Setup The IP Setup Page opens Figure 60...

Страница 129: ...rrently configured subnet mask Default Gateway Displays the currently configured default gateway 2 Select Static or DHCP mode 3 If Static has been selected configure the IP Address Subnet Mask and Default Gateway 4 Click Apply The IP configuration is enabled and the device is up dated The Address Resolution Protocol ARP converts IP addresses into physi cal addresses and maps the IP address to a MA...

Страница 130: ...he ARP Settings Summary Page contains the following fields Interface Indicates the VLAN for which ARP parameters are defined IP Address Indicates the station IP address which is associated with the MAC Address MAC Address Displays the station MAC address which is associated in the ARP table with the IP address Status Displays the ARP table entry type Possible field values are Dynamic Indicates the...

Страница 131: ...ins the following fields VLAN Indicates the VLAN for which ARP parameters are defined IP Address Indicates the station IP address which is associated with the MAC address MAC Address Displays the station MAC address which is associated in the ARP table with the IP address ARP Entry Age Out Specifies the amount of time in seconds that passes between ARP Table entry requests Following the ARP Entry ...

Страница 132: ...nistration IP Addressing ARP Settings Remove The ARP Settings Remove Page opens Figure 63 ARP Settings Remove Page Removing ARP Entries The ARP Settings Remove Page contains the following fields Clear ARP Table Entries Specifies the types of ARP entries that are cleared The possible values are None Maintains the ARP entries All Clears all ARP entries Dynamic Clears only dynamic ARP entries Static ...

Страница 133: ...o be removed 3 Click Remove The ARP interface is removed and the device is updated MAC addresses are stored in either the Static Address or the Dynamic Address databases A packet addressed to a destination stored in one of the databases is forwarded immediately to the port The Dynamic Ad dress Table can be sorted by interface VLAN and MAC Address MAC addresses are dynamically learned as packets fr...

Страница 134: ...ding Entries into Address Tables Defining Aging Time Removing Address Table Ports Removing Address Tables Viewing Address Table Settings The Address Table Summary Page displays the current MAC address table configuration To view Address Table settings 1 Click Monitoring Address Tables Summary The Address Table Summary Page opens Figure 64 Address Table Summary Page ...

Страница 135: ...ays the current MAC addresses listed in the MAC address table filtered by the selected value of the State field VLAN ID Displays the VLAN ID attached to the MAC Address State Displays a table display based on the type of MAC address Possible values are Static Indicates the MAC address is statically configured Dynamic Indicates the MAC address is dynamically configured Port Index Indicates the port...

Страница 136: ...elds Select a Port Displays the current port settings State Filters the list of MAC Addresses displayed according to the type of MAC Address configuration Possible values are All Displays all MAC Addresses assigned to the port Static Displays static MAC Addresses assigned to the port Dynamic Displays dynamic MAC Addresses assigned to the port MAC Address Displays MAC Addresses currently listed in ...

Страница 137: ... number Aging Time Indicates that the MAC address is aged out or not NOAGED Indicates that the Address Table entry is not aged out AGING Indicates that the Address Table entry is aged out The Address Table Add Page allows the network manager to assign MAC addresses to ports with VLANs The monitor users have no access to this page To add Address Tables 1 Click Monitoring Address Tables Add The Addr...

Страница 138: ...user is aged out Select a Port Select the port for which the MAC settings are defined MAC Address Displays the current MAC addresses listed in the MAC address table VLAN ID Displays the VLAN ID assigned to the user defined MAC Address State Displays the current MAC Address state Possible values are Static Indicates that the Address Table entry assigned by Port Index Indicates Port Table number Agi...

Страница 139: ...seconds The monitor users have no access to this page To define the Aging Time 1 Click Monitoring Address Tables Setup The Address Table Setup Page opens Figure 67 Address Table Setup Page The Address Table Setup Page contains the following field Aging Time Specifies the amount of time the MAC Address remains in the Dynamic MAC Address table before it is timed out if no traffic from the source is ...

Страница 140: ...age opens Figure 68 Port Remove Page The Port Remove Page contains the following fields Select a Port Displays the current port settings MAC Address Displays the current MAC addresses listed in the MAC address table VLAN ID Displays the VLAN ID attached to the MAC Address State Displays the MAC address configuration method Possible values are Static Indicates the MAC address is statically configur...

Страница 141: ...ess on the table 3 Select the MAC addresses to remove 4 Click Remove The selected MAC addresses are removed from the MAC address table and the device is updated The Address Table Remove Page allows the network manager to remove current MAC addresses from the Address Table The monitor users have no access to this page To remove Address Tables 1 Click Monitoring Address Table Remove The Address Tabl...

Страница 142: ...is statically configured Dynamic Indicates the MAC address is dynamically configured Port Index Indicates Port Table number Aging Time Indicates that the MAC address is aged out or not NOAGED Indicates that the Address Table entry is not aged out AGING Indicates that the Address Table entry is aged out Select All Allows the user ti select all table entries to remove Select None Removes tthe table ...

Страница 143: ...nd Multicast traffic When IGMP Snooping is enabled and IGMP Query globally the device issues IGMP query Ports requesting to join a specific Multicast group issue an IGMP report specifying that Multicast group is accepting members This results in the creation of the Multicast filtering database This section contains the following topic Defining IGMP Snooping Query Introduction The IGMP Snooping Que...

Страница 144: ...fault value Enabled Indicates that IGMP Snooping is enabled on the device IGMP Query Status Indicates if IGMP Query is enabled on the device The possible field values are Disabled Indicates that IGMP Query is disabled on the device This is the default value Enabled Indicates that IGMP Query is enabled on the device Select VLAN ID Specifies the VLAN ID IGMP Snooping Status Indicates if IGMP snoopin...

Страница 145: ...Snooping on the VLAN IGMP Query Status Indicates if IGMP Query is enabled on the VLAN The possible field values are Disabled Disables IGMP Query on the VLAN This is the default value Enabled Enables IGMP Query on the VLAN 2 Select Enabled IGMP Snooping 3 Define the fields 4 Click Apply IGMP settings are applied and the device is updated ...

Страница 146: ...n 30 60 seconds Rapid Spanning Tree Protocol RSTP detects and uses network topologies that allow a faster STP convergence without creating forwarding loops The device supports the following STP versions Classic STP Provides a single path between end stations avoid ing and eliminating loops Rapid STP Detects and uses network topologies that provide faster convergence of the spanning tree without cr...

Страница 147: ... Spanning Tree Summary Page contains the following fields Port The interface for which the information is displayed Status Indicates if STP or RSTP is enabled on the port The possible field values are Enabled Indicates that STP or RSTP is enabled on the port Disabled Indicates that neither STP nor RSTP is enabled on the port Path Cost Indicates the port contribution to the root path cost The path ...

Страница 148: ...rwards traffic while learning MAC addresses Blocking Indicates that the port is currently blocked and cannot forward traffic or learn MAC addresses Blocking is displayed when Classic STP is enabled Listening Indicates that the port is in Listening mode The port cannot forward traffic nor can it learn MAC addresses Learning Indicates that the port is in Learning mode The port cannot forward traffic...

Страница 149: ...using the Spanning Tree Setup Page The monitor user has no access to this page To configure Spanning Tree Setup 1 Click Device Spanning Tree Setup The Spanning Tree Setup Page opens Figure 72 Spanning Tree Setup Page Defining Spanning Tree The Spanning Tree Setup Page contains the following fields Status Indicates whether STP or RSTP is enabled on the device The possible field values are Enabled E...

Страница 150: ...oot Bridge waits between configuration messages The default is 2 seconds Forward Delay Specifies the device Forward Delay Time The Forward Delay Time is the amount of time in seconds a bridge remains in a listening and learning state before forwarding packets The default is 15 seconds Max Age Specifies the device Maximum Age Time The Maximum Age Time is the amount of time in seconds a bridge waits...

Страница 151: ...e Maintains the current STP settings This is the default value Edge Port Specifies if Edge Port is enabled on the port If Edge Port is enabled for a port the Port State is automatically placed in the Forwarding state when the port link is up Edge Port optimizes the STP protocol convergence STP convergence takes 30 seconds and is not dependent on the number of switches in the network However an edg...

Страница 152: ...o Enables the device to establish automatically a Point to Point link Path Cost Indicates the port contribution to the root path cost The path cost is adjusted to a higher or lower value and is used to forward traffic when a path is re routed The field range is 1 200 000 000 Priority Priority value of the port The priority value influences the port choice when a bridge has two ports connected in a...

Страница 153: ...f variables which are used to manage the device The variables are defined in the Management Information Base MIB The SNMP agent defines the MIB specification format as well as the format used to access the information over the network Access rights to the SNMP agents are controlled by access strings This section contains the following topics Defining SNMP Communities Removing SNMP Communities Defi...

Страница 154: ...1 and SNMP v2c Monitor users have no access to this page To define SNMP communities 1 Click Administration SNMP Communities Setup The SNMP Communities Setup Page opens Figure 74 SNMP Communities Setup Page The SNMP Communities Setup Page contains the following fields SNMP Status Defines SNMP on the device The possible field values are Enabled Enables SNMP on the device Disabled Disables SNMP on th...

Страница 155: ...nity string name private Displays the pre defined private community string name User Defined Defines a user defined community string name Access Mode Defines the access rights of the community The possible field values are Read Only Management access is restricted to read only and changes cannot be made to the community Read Write Management access is read write and changes can be made to the devi...

Страница 156: ...ies Remove Page opens Figure 75 SNMP Communities Remove Page The SNMP Communities Remove Page contains the following fields Remove Removes a community The possible field values are Checked Removes the selected SNMP community Unchecked Maintains the SNMP communities Management Station Displays the management station IP address for which the SNMP community is defined Community String Displays the us...

Страница 157: ...he device configuration but not to the community 2 Select the SNMP Community to be removed 3 Click Remove The SNMP Community is removed and the device is updated The SNMP Traps Setup Page contains information for defining filters that determine whether traps are sent to specific users and the trap type sent Monitor users have no access to this page To define SNMP traps 1 Click Administration SNMP ...

Страница 158: ...The possible field values are SNMP V1 Indicates that SNMP Version 1 traps are sent SNMP V2c Indicates that SNMP Version 2 traps are sent 2 Define the relevant fields 3 Click Apply The SNMP Traps are defined and the device is updated The SNMP Traps Remove Page allows the network manager to remove SNMP Traps Monitor users have no access to this page To remove SNMP traps 1 Click Administration SNMP T...

Страница 159: ...the list of recipients Recipients IP Defines the IP address to which the traps are sent Trap Displays the trap type The possible field values are SNMP V1 Indicates that SNMP Version 1 traps are sent SNMP V2c Indicates that SNMP Version 2 traps are sent Community String Defines the community string of the trap manager 2 Select the SNMP trap to be deleted 3 Click Remove The SNMP trap is deleted and ...

Страница 160: ...ased on packet information and packet field values such as VLAN Priority Tag VPT and DiffServ Code Point DSCP VPT Classification Information VLAN Priority Tags VPT are used to classify packets by mapping packets to one of the egress queues VPT to Queue assignments are user definable Packets arriving untagged are assigned a default VPT value which is set on a per port basis The assigned VPT is used...

Страница 161: ... CoS Summary The CoS Summary Page opens Figure78 CoS Summary Page Viewing CoS Settings The CoS Summary Page contains the following fields Interface Displays the interface for which the CoS default value is defined Default CoS Displays the default CoS value for incoming packets for which a VLAN priority tag is not defined The possible field values are 0 7 ...

Страница 162: ...ing fields QoS Mode Determines the QoS mode on the device Disabled Disables QoS on the device Enabled Enables QoS on the device Select Port s Indicates the ports to be configured Set Default Sets the default user priority The possible field values are 0 7 The default CoS value is 0 With the default settings 0 is the lowest and 7 is the highest priority Restore Default Restores the device factory d...

Страница 163: ...ault setting WRR Monitor users have no access to this page To configure Queue Settings 1 Click Device QoS Queue The Queue Setup Page opens Figure 80 Queue Setup Page The Queue Setup Page contains the following fields Strict Priority Process the higher over the lower queues WRR ratio 1 2 15 Rotate service among the queues based on the weights assigned to each queues 2 Define the fields 3 Click Appl...

Страница 164: ...raffic queues Four traffic priority queues are supported on the device with 1 representing the lowest queue and 4 as the highest The highest priority queue functions with strict priority Queues 1 3 function with WRR priority with the following weights 1 2 and 10 respectively The monitor user has no access to this page The CoS to Queue Summary Page contains the following fields Class of Service Spe...

Страница 165: ... fields Restore Defaults Restores the device factory defaults for mapping CoS values to a forwarding queue Class of Service Specifies the CoS priority tag values where zero is the lowest and 7 is the highest Queue Defines the traffic forwarding queue to which the CoS priority is mapped 2 Define the queue number in the Queue field next to the required CoS value 3 Click Apply The CoS value is mapped...

Страница 166: ...ry The DSCP to CoS Summary Page opens Figure 83 DSCP to CoS Summary Page Viewing DSCP to CoS The DSCP to CoS Summary Page contains the following fields DSCP Displays the incoming packet s DSCP value Cos Specifies the value of CoS to which the DSCP priority is mapped for traffic forwarding Eight 8 CoS are supported 2 Define the queue number in the CoS field next to the required DSCP value 3 Click A...

Страница 167: ...S DSCP to CoS Setup The DSCP to CoS Setup Page opens Figure 84 DSCP to CoS Setup Page Configuring DSCP to CoS The DSCP to CoS Setup Page contains the following fields DSCP Displays the incoming packet s DSCP value CoS Specifies the value of CoS to which the DSCP priority is mapped for traffic forwarding Eight 8 CoS are supported 2 Define the queue number in the CoS field next to the required DSCP ...

Страница 168: ...The Trust Setup Page contains the following fields Trust Mode Defines which packet fields to use for classifying packets entering the device When no rules are defined the traffic containing the predefined packet CoS field is mapped according to the relevant trust modes table Traffic not containing a predefined packet field is mapped to best effort The possible Trust Mode field values are CoS Class...

Страница 169: ...igure 86 Bandwidth Summary Page The Bandwidth Summary Page contains the following fields Interface Displays the interface for which rate limit and shaping parameters are defined Ingress Rate Limit Status Indicates if rate limiting is defined on the interface The possible field values are Enable Enables ingress rate limiting on the interface No Limit Ingress rate limiting is disabled on the interfa...

Страница 170: ...es CbS as the interface shaping type Defining Bandwidth Settings The Bandwidth Setup Page allows network managers to define the bandwidth settings for a specified interface Interface shaping can be based on an interface and is determined by the lower specified value The interface shaping type is selected in the Bandwidth Setup Page The monitor user has no access to this page To configure Bandwidth...

Страница 171: ...Egress Shaping Rates Committed Information Rate CIR Defines CIR as the inter face shaping type The possible field value is 128 500 032 kbits per second Committed Burst Size CbS Defines CbS as the interface shaping type The possible field value is 64 131 072 kbits per second Select ports Indicates the ports to be configured Select All Allows the user to assign the bandwidth settings to all ports Se...

Страница 172: ...s not deteriorate if the IP traffic is received unevenly The system supports one Voice VLAN There are two operational modes for IP Phones IP phones are configured with VLAN mode as enabled ensuring that tagged packets are used for all communications If the IP phone s VLAN mode is disabled the phone uses untagged packets The phone uses untagged packets while retrieving the initial IP address throug...

Страница 173: ...e contains the following fields Voice VLAN State Indicates if Voice VLAN is enabled on the device The possible field values are Enabled Enables Voice VLAN on the device Disabled Disables Voice VLAN on the device This is the default value Voice VLAN ID Defines the Voice VLAN ID number Voice VLAN Aging Time Indicates the amount of time after the last IP phone s OUI is aged out for a specific port Th...

Страница 174: ...rently The Voice VLAN Setup Page provides information for enabling and defining Voice VLAN globally on the device To configure Voice VLAN Settings 1 Click Device QoS VoIP Traffic Setting Setup The Voice VLAN Setup Page opens Figure 89 Voice VLAN Setup Page Defining Voice VLANs The Voice VLAN Setup Page contains the following fields Voice VLAN Status Indicates if Voice VLAN is enabled on the device...

Страница 175: ...he Dynamic MAC Address table The default time is 300 sec For more information on defining MAC address age out time see Defining Aging Time 2 Select Enable in the Voice VLAN State field 3 Define the Voice VLAN and Voice VLAN Aging Time fields 4 Click Apply The Voice VLAN is defined and the device is updated Defining Voice VLAN Port Settings The Voice VLAN Port Setup Page contains information for de...

Страница 176: ...ice VLAN Aging Time in the setup page Voice VLAN Port Security Indicates if port security is enabled on the Voice VLAN Port Security ensures that packets arriving with an unrecognized MAC address are dropped No Changes Maintains the current Voice VLAN port security settings Enabled Enables port security on the Voice VLAN Disabled Disables port security on the Voice VLAN This is the default value S...

Страница 177: ...Zoom View The port is highlighted in blue and the Voice VLAN port settings are displayed in the text box 2 Click a port in the Zoom View The port is highlighted in blue 3 Define the Voice VLAN Port Mode and Voice VLAN Security fields 4 Click Apply The Voice VLAN port settings are defined and the device is updated The Voice VLAN Port Details Page displays the Voice VLAN port settings for specific p...

Страница 178: ...ent Voice VLAN port settings VLAN port definitions are applied Port Displays the Voice VLAN Port Details for a selected port Mode Defines the Voice VLAN mode The possible field values are None Indicates that the selected port will not be added to a Voice VLAN Manual Adding a selected port to a Voice VLAN Auto Indicates that if traffic with an IP Phone MAC Address is transmitted on the port the por...

Страница 179: ...ds OUI List Telephony OUI s Lists the OUIs currently enabled on the Voice VLAN The following OUIs are enabled by default 00 E0 BB Assigned to 3Com IP Phones 00 03 6B Assigned to Cisco IP Phones 00 E0 75 Assigned to Polycom Veritel IP Phones 00 D0 1E Assigned to Pingtel IP Phones 00 01 E3 Assigned to Siemens IP Phones 00 60 B9 Assigned to NEC Philips IP Phones 00 0F E2 Assigned to H3C IP Phones Des...

Страница 180: ...anagers can add specific manufacture s MAC addresses to the OUI table Once the OUIs are added all traffic received on the Voice VLAN ports from the specific IP phone with a listed OUI is forwarded on the voice VLAN To modify OUI Settings 1 Click Device QoS VoIP Traffic Setting OUI Modify The Voice VLAN OUI Modify Page opens Figure 93 Voice VLAN OUI Modify Page Modifying OUI Definitions The Voice V...

Страница 181: ...tion File Contains all configuration file commands and all commands entered during the current session When the device is powered down or rebooted the commands in the Running Configuration file are lost During startup all commands in the Startup file are copied to the Running Configuration File and applied to the device To update the Startup file click the Save Configuration button before powering...

Страница 182: ...up Page opens Figure 94 Backup Page Backing Up System Files The Backup Page contains the following fields Upload via TFTP Enables initiating an upload to the TFTP server Upload via HTTP Enables initiating an upload to the HTTP client or HTTPS client TFTP Server IP Address Specifies the TFTP Server IP Address to which the configuration files are uploaded Destination File Name Specifies the destinat...

Страница 183: ... fields Download via TFTP Enables a download from the TFTP server Download via HTTP Enables a download from the HTTP client or HTTPS client Configuration Download TFTP Server IP Address Specifies the TFTP Server IP Address from which the configuration files are downloaded Source File Name Specifies the source file from which the configuration file is downloaded 2 Define the relevant fields 3 Click...

Страница 184: ... Image The Restore Image Page opens Figure 96 Restore Image Page The Restore Image Page contains the following fields Download via TFTP Enables initiating a download via the TFTP server Download via HTTP Enables initiating a download via the HTTP client or HTTPS client TFTP Server IP Address Specifies the TFTP Server IP Address from which the image files are downloaded Source File Name Specifies t...

Страница 185: ...ctivating Image Files The Active Image Page contains the following fields Active Image After Reset The Image file which is active on the unit after the device is reset The possible field values are Current Image Activates the current image after the device is reset Backup Image Activates backup image after the device is reset 2 Select the active image to be activated after reset 3 Click Apply The ...

Страница 186: ... view RMON statistics 1 Click Ports Statistics Summary The Port Statistics Summary Page opens Figure 98 Port Statistics Summary Page This section contains information about viewing port statistics Viewing Port Statistics The Port Statistics Summary Page contains the following fields Select a Port Defines the specific port for which RMON statistics are displayed ...

Страница 187: ... number of packets received on the interface including bad packets Multicast and broadcast packets since the device was last refreshed Broadcast Packets Received Displays the number of good broadcast packets received on the interface since the device was last refreshed This number does not include Multicast packets Multicast Packets Received Displays the number of good Multicast packets received o...

Страница 188: ...reshed Frames of 64 Bytes Number of 64 byte frames received on the interface since the device was last refreshed Frames of 65 to 127 Bytes Number of 65 to 127 byte frames received on the interface since the device was last refreshed Frames of 128 to 255 Bytes Number of 128 to 255 byte frames received on the interface since the device was last refreshed Frames of 256 to 511 Bytes Number of 256 to 5...

Страница 189: ...g packets from one port to a monitoring port Port mirroring can be used as a diagnostic tool as well as a debugging feature Port mirroring also enables switch performance monitoring Network administrators can configure port mirroring by selecting a specific port from which to copy all packets and other ports to which the packets copied The monitor user has limited access to this page This section ...

Страница 190: ...e following fields Select Port Type Defines the port that will be the monitor port destination port and the port that will be mirrored source port The possible values are Monitor Defines the port as the monitor or the destination port Mirror Defines the port as the mirrored port to be monitored and indicates the traffic direction to be monitored If selected the possible values are Mirror In Enable...

Страница 191: ...ut Displays ports that are monitored on the TX 2 Select a port type 3 If the Mirrored port type is selected select Mirror In or Mirror Out 4 Select the ports to be monitored 5 Click Apply Port mirroring is enabled and the device is updated The Port Mirroring Remove Page permits the network manager to terminate port mirroring or monitoring The monitor users have no access to this page 1 Click Monit...

Страница 192: ... Page contains fields for viewing tests on copper cables Cable testing provides information about where errors occurred in the cable the last time a cable test was performed and the type of cable error which occurred The tests use Time Domain Reflectometry TDR technology to test the quality and characteristics of a copper cable attached to a port The monitor users have limited access to this page ...

Страница 193: ...es the last time the port was tested The Diagnostics Page contains fields for performing tests on copper cables Cable testing provides information about where errors occurred in the cable the last time a cable test was performed and the type of cable error which occurred The tests use Time Domain Reflectometry TDR technology to test the quality and characteristics of a copper cable attached to a p...

Страница 194: ...Indicates that a cable is not connected to the cable but is either connected on only one side or the cable is 1 meter Short Indicates that a short has occurred in the OK Indicates that the cable passed the test Cable Fault Distance Indicates the distance from where the cable error occurred A Cable Fault Distance of 0 can result from a short 1m cable cable or a 2 pair copper cable Last Update Indic...

Страница 195: ...Com Network Supervisor 3NS is an easy to use management application that graphically discovers maps and monitors the network and links It maps devices and connections so you can easily Monitor stress levels Set thresholds and alerts View network events Generate reports in user defined formats Launch embedded device configuration tools 3NS is configured with intelligent defaults and the ability to ...

Страница 196: ... help you manage your 3Com network and to download a trial version go to www 3com com 3nd 3Com Network Access Manager is installed seamlessly into Microsoft Active Directory and Internet Authentication Service IAS It simplifies the task of securing the network perimeter by allowing the administrator to easily control network access directly from the Users and Computers console in Microsoft Active ...

Страница 197: ...pable devices such as switches routers security switches the 3Com VCX IP Telephony server and wireless access points Up to 250 devices Up to 1 000 devices Up to 5 000 devices An unlimited number of devices To find out more about 3Com Enterprise Management Suite go to www 3com com ems I3Com Integration Kit for HP OpenView Network Node Manager offers businesses the option of managing their 3Com netw...

Страница 198: ... Emissions EN55022 Class A CISPR 22 Class A FCC Part 15 Subpart B Class A ICES 003 Class A VCCI Class A EN61000 3 2 EN61000 3 3 EMC Immunity EN55024 Operating Temperature 0 to 40 C 32 to 104 F Storage Temperature 40 to 70 C 40 to 158 F Humidity 0 95 non condensing Standard EN 60068 IEC 68 Width 440 mm 17 3 in Depth 265 mm cm 10 43 in Height 44 mm 1 73 in or 1U Weight 2 0 kg 4 4 lb Mounting Free st...

Страница 199: ... modes of operation The auto negotiation function provides the means to exchange information between two devices that share a point to point link segment and to automatically configure both devices to take maximum advantage of their abilities Auto negotiation is performed totally within the physical layers during link initiation without any additional overhead to either the MAC or higher protocol ...

Страница 200: ...e device configuration is stored in a configuration file The Configuration Management file includes both system wide and port specific device configuration The system can display configuration files in the form of a collection of CLI commands which are stored and manipulated as text files DHCP Clients Dynamic Host Client Protocol DHCP enables additional setup parameters to be received from a netwo...

Страница 201: ...mited broadcast service which allows one to many and many to many connections for information distribution Layer 2 Multicast service is where a single frame is addressed to a specific Multicast address from where copies of the frame are transmitted to the relevant ports MDI MDIX Support The device automatically detects whether the cable connected to an RJ 45 port is crossed or straight through whe...

Страница 202: ...management and monitoring RMON is a standard MIB that defines current and historical MAC layer statistics and control objects allowing real time information to be captured across the entire network Self Learning MAC Addresses The device enables automatic MAC address learning from incoming packets The MAC addresses are stored in the Bridging Table SNMP Alarms and Trap Logs The system logs events wi...

Страница 203: ...detects and reports copper link cabling occurrences such as open cables and cable shorts VLAN Support VLANs are collections of switching ports that comprise a single broadcast domain Packets are classified as belonging to a VLAN based on either the VLAN tag or based on a combination of the ingress port and packet contents Packets sharing common attributes can be grouped in the same VLAN Web based ...

Страница 204: ...ch s Console port and the other end has a DB 9 socket connector for connecting to the serial port on the terminal as shown in Figure 102 Figure 102 Console cable Console Cable RJ 45 Signal Direction DB9 modem DB9 console 1 RTS 7 8 2 DTR 4 4 3 TXD 3 2 4 CD 1 5 5 GND 5 5 6 RXD 2 3 7 DSR 6 4 8 CTS 8 7 Table 12 Console cable pinouts ...

Страница 205: ...appendix c pIn outs 194 Null Modem Cable RJ 45 to RS 232 25 pin PC AT Serial Cable RJ 45 to 9 pin Modem Cable RJ 45 to RS 232 25 pin ...

Страница 206: ...Data C 6 Receive Data Bidirectional Data B 7 Not assigned Bidirectional Data D 8 Not assigned Bidirectional Data D Table 11 Pin assignments Pin Number 10 100 1000 Ports configured as MDIX 1 Receive Data Bidirectional Data B 2 Receive Data Bidirectional Data B 3 Transmit Data Bidirectional Data A 4 Not assigned Bidirectional Data A 5 Not assigned Bidirectional Data D 6 Transmit Data Bidirectional D...

Страница 207: ...sible causes of the problem With the problem known the effect of the problem is recorded with all known results from the problem Once the problem is quantified the solution is applied Solutions are found either in this chapter or through customer support If no solution is found in this chapter contact Customer Support Listed below are some possible troubleshooting problems and solutions These erro...

Страница 208: ...onnections may already be open Try again at a later time No response from the Faulty serial cable Replace the serial cable terminal emulation Incorrect serial cable Replace the serial cable for a pin to pin straight flat cable software Software Settings Reconfigure the emulation software connection settings Response from the Faulty serial cable Replace the serial cable terminal emulation Software ...

Страница 209: ...eck pinout and replace if necessary port LED is off e g crossed rather than straight cable or vice versa split pair incorrect twisting of pairs Fiber optical cable Change if necessary Check Rx and Tx on fiber optic cable connection is reversed Bad cable Replace with a tested cable Wrong cable type Verify that all 10 Mbps connections use a Cat 5 cable Check the port LED or zoom screen in the NMS ap...

Страница 210: ...l emulation application 2 Set the baud rate to 38400 3 Set the data format to 8 data bits 1 stop bit and no parity 4 Set Flow Control to none 5 Under Properties select VT100 for Emulation mode 6 Select Terminal keys for Function Arrow and Ctrl keys Ensure that the setting is for Terminal keys not Windows keys Logging on to the CLI The Login process requires a User Name and Password The default use...

Страница 211: ...n process restarts Incorrect Password The user session is automatically terminated after 30 minutes in which no device configuration activity has occurred The following message is displayed Session closed by automatic logout The command line interface supports one CLI session This Command section contains the following commands initialize ipSetup logout ping password reboot summary upgrade Automat...

Страница 212: ... for this command Example The following displays the list presented for the command Select menu option Displays Help information initialize Reset the device to factory default except IP ipSetup Configures IP address logout Logout from this session ping Ping a remote station password Change password reboot Power cycles the device summary Summarizes IP setup and software versions upgrade Software up...

Страница 213: ...on User Guidelines There are no user guidelines for this command Example The following displays current IP configuration and software versions running on the device Select menu option ping Ping server 10 6 150 75 64 bytes from 10 6 150 75 icmp_seq 0 time 0ms 64 bytes from 10 6 150 75 icmp_seq 1 time 10ms 64 bytes from 10 6 150 75 icmp_seq 2 time 0ms 64 bytes from 10 6 150 75 icmp_seq 3 time 0ms Se...

Страница 214: ... Images Syntax summary Default Configuration This command has no default configuration User Guidelines There are no user guidelines for this command Example The following displays current IP configuration and software versions running on the device Select menu option Summary IP Method Manual IP address 1 2 3 4 Subnet mask 255 255 255 0 Default gateway 4 3 2 1 Runtime version example1 ext Bootcode ...

Страница 215: ...ddress is defined for interfaces User Guidelines IP Addresses configured beyond the range of 224 0 0 0 are defined as multicast experimental or broadcast addresses If a default gateway is configured manually the IP address and mask are required to be the same as the gateway address and mask Example The following example displays an IP address configured manually The following example displays an I...

Страница 216: ...e Specifies the source file name Default Configuration This command has no default configuration User Guidelines During the upgrade process a series of dots appear representing the upgrade process in the CLI interface When the upgrade process is completed the command prompt reappears The Dual Software Image feature is supported Therefore the next boot after upgrade command will always use the newl...

Страница 217: ...nd has no default configuration User Guidelines The system prompts for confirmation of the request If no response is entered within 15 seconds timeout occurs and the command is not executed Example Intialize Select menu option initialize WARNING This command initializes the system to factory defaults excluding IP details and causes a reset Do you wish to continue yes no no no Select menu option ...

Страница 218: ...r cycle of the device Syntax reboot Default Configuration This command has no default configuration User Guidelines There are no user guidelines for this command Example Reboot Select menu option reboot Are you sure you want to reboot the system yes no no no Select menu option ...

Страница 219: ... Logout command terminates the CLI session Syntax logout Default Configuration This command has no default configuration User Guidelines There are no user guidelines for this command Example Layout Select menu option logout exiting session Login ...

Страница 220: ...on This command has no default configuration User Guidelines The user needs to login to the session in order to change the password Example Select menu option password Change password for user username Old password Enter new password Retype password The command line interface password has been successfully changed Select menu option ...

Страница 221: ...eues using weighted round robin service to enforce priority service and prevent blockage of lower level queues Priority may be set according to the port default the packet s priority bit in the VLAN tag TCP UDP port number IP Precedence bit or DSCP priority bit Boot Protocol BOOTP BOOTP is used to provide bootup information for network devices including IP address information the address of the TF...

Страница 222: ...LANs and defines a standard way for VLANs to communicate across switched networks An IEEE standard for providing quality of service QoS in Ethernet networks The standard uses packet tags that define up to eight traffic classes and allows switches to transmit packets based on the tagged priority value An IEEE standard for the Multiple Spanning Tree Protocol MSTP which provides independent spanning ...

Страница 223: ...ecedence bits defining eight different priority levels ranging from highest priority for network control packets to lowest priority for routine traffic The eight values are mapped one to one to the Class of Service categories by default but may be configured differently to suit the requirements for specific network applications Data Link layer in the ISO 7 Layer Data Communications Protocol This i...

Страница 224: ...the target port to be studied unobstructively Defines a network link aggregation and trunking method which specifies how to create a single high speed logical link that combines several lower speed physical links Private VLANs provide port based security and isolation between ports within the assigned VLAN Data traffic on downlink ports can only be forwarded to and from uplink ports MD5 Message Di...

Страница 225: ...ch offers network management services Remote Authentication Dial in User Service RADIUS Remote Monitoring RMON Rapid Spanning Tree Protocol RSTP Secure Shell SSH Routing Information Protocol RIP Simple Network Management Protocol SNMP Protected Extensible Authentication Protocol PEAP A protocol proposed by Microsoft Cisco and RSA Security for securely transporting authentication data including pas...

Страница 226: ...ol used to transfer files between devices Data is grouped in 128 byte blocks and error corrected User Datagram Protocol UDP Virtual LAN VLAN XModem Spanning Tree Protocol STP Terminal Access Controller Access Control System Plus TACACS A technology that checks your network for any loops A loop can often occur in complicated or backup linked network systems Spanning Tree detects and directs data al...

Страница 227: ... tool is located at http knowledgebase 3com com It contains thousands of technical solutions written by 3Com support engineers To enhance response times or extend your warranty benefits you can purchase value added services such as 24x7 telephone technical support software upgrades onsite assistance or advanced hardware replacement Experienced engineers are available to manage your installation wi...

Страница 228: ...eature enhancements incremental functionality and bug fixes but they do not include software that is released by 3Com as a separately ordered product Separately orderable software releases and licenses are listed in the 3Com Price List and are available for purchase from your 3Com reseller 3Com offers telephone internet and e mail access to technical support and repair services To access these ser...

Страница 229: ...You can also obtain non urgent support in this region at this email address apr_technical_support 3com com Request a return material authorization number RMA by FAX using this number 61 2 9937 5048 or send an email at this email address ap_rma_request 3com com Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these regions not listed below call 44 1442 435529 Fr...

Страница 230: ... AT T 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 1 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 Guatemala Haiti Honduras Jamaica Martinique Mexico Nicaragua Panama Paraguay Peru Puerto Rico Salvador Trinidad and Tobago Uruguay Venezuela Virgin Islands AT T 800 998 2112 57 1 657 0888 AT T 800 998 2112 1 800 998 2112 571 657 0888 01 800 849CARE AT T 800 998 2112 AT T 800 998 2112 54 11 489...

Страница 231: ...outlet so that equipment and receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government P...

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