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D-Link DES-3250TG Standalone Layer 2 Switch

Observe the following formulas when setting the above parameters:

Max. Age

≤

2 x (Forward Delay - 1 second)

Max. Age

≥

2 x (Hello Time + 1 second)

STP Port Settings

The Spanning Tree Protocol (STP) operates on two levels: on the switch level, the settings are globally implemented. On the
port level, the settings are implemented on a user-defined Group of ports basis.

To configure STP, click the Spanning Tree folder on the Configuration menu and then click on the STP Port Settings link:

Содержание DES-3250TG

Страница 1: ...D Link DES 3250TG Stackable Layer 2 Switch User s Guide ____________________...

Страница 2: ...ly forbidden Trademarks used in this text D Link and the D Link logo are trademarks of D Link Computer Corporation Microsoft and Windows are registered trademarks of Microsoft Corporation Other tradem...

Страница 3: ...anel 7 Rear Panel 7 Side Panels 8 Gigabit Combo Ports 8 LED Indicators 8 Connecting the Switch 10 Switch to End Node 10 Switch to Hub or Switch 10 10BASE T Device 11 100BASE TX Device 11 Stacking vs S...

Страница 4: ...IGMP Snooping 43 Static Router Ports Entry 45 Spanning Tree 46 STP Switch Settings 48 STP Port Settings 50 Forwarding Filtering 53 Unicast Forwarding 53 Multicast Forwarding 53 VLANs 55 Static VLAN En...

Страница 5: ...112 SNMPV3 113 SNMP User Table 113 SNMP View Table 115 SNMP Group Table 117 SNMP Community Table 119 SNMP Host Table 120 SNMP Engine ID 121 Monitoring 122 CPU Utilization 122 Port Utilization 123 Pack...

Страница 6: ...Layer 2 Switch Reset 149 Reset System 149 Reset Config 150 Logout 150 Appendix A 150 Technical Specifications 150 Appendix B 153 Understanding and Troubleshooting the Spanning Tree Protocol 153 Warra...

Страница 7: ...cting devices to the Switch Section 7 Configuration A detailed discussion about configuring some of the basic functions of the Switch including accessing the Switch information using the Switch s util...

Страница 8: ...o not spill food or liquids on your system components and never operate the product in a wet environment If the system gets wet see the appropriate section in your troubleshooting guide or contact you...

Страница 9: ...to the power supply Unplug the power cable before removing the power supply If the system has multiple sources of power disconnect power from the system by unplugging all power cables from the power...

Страница 10: ...y or an electrician if you are uncertain that suitable grounding is available CAUTION The system chassis must be positively grounded to the rack cabinet frame Do not attempt to connect power to the sy...

Страница 11: ...ilizing the same packet structure format and support for full duplex and management objects but with a tenfold increase in theoretical throughput over 100Mbps Fast Ethernet and a one hundred fold incr...

Страница 12: ...er port at 100 of wire speed for 100Mbps speed Data filtering rate eliminates all error packets runts etc at 14 880 pps per port at 100 of wire speed for 10Mbps speed Data filtering rate eliminates al...

Страница 13: ...Fast Spanning Tree Algorithm Protocol for creation of alternative backup paths and prevention of network loops SNMP V1 V2C and V3 are supported Fully configurable in band control for SNMP based softwa...

Страница 14: ...al D Link reseller for replacement Installation Use the following guidelines when choosing a place to install the Switch The surface must support at least 5 kg The power outlet should be within 1 82 m...

Страница 15: ...ck which can be placed in a wiring closet with other equipment To install attach the mounting brackets on the switch s side panels one on each side and secure them with the screws provided Figure 2 2...

Страница 16: ...r the power switch is turned on the LED indicators should respond as follows All LED indicators will momentarily blink This blinking of the LED indicators represents a reset of the system The power LE...

Страница 17: ...sole port for setting up and managing the switch via a connection to a console terminal or PC using a terminal emulation program Forty eight high performance NWay Ethernet ports all of which operate a...

Страница 18: ...ventilation Be reminded that without proper heat dissipation and air circulation system components might overheat which could lead to system failure Gigabit Combo Ports In addition to the 48 10 100 Mb...

Страница 19: ...ready state of the device Console This indicator is lit green when the switch is being managed via local console management through the RS 232 console port Link Act These indicators are located to th...

Страница 20: ...t Ethernet Network Interface Card NIC and most routers An end node can be connected to the Switch via a two pair Category 3 4 or 5 UTP STP cable The end node should be connected to any of the ports 1x...

Страница 21: ...tart and the negotiation process begins anew When the stacking mode is disabled config stacking mode disable the Switch only allows standalone operation If stacking mode is disabled on a Switch it sho...

Страница 22: ...a standalone device even if a stacking module is installed To force standalone operation it is necessary to use the CLI command config stacking mode disable A Switch that has stacking mode disabled s...

Страница 23: ...tches are added to or taken out of a stacked group of DES 3250TG Switches it is necessary to change the composition of a Switch stack and rearrange the stacking connections If a stacking link fails or...

Страница 24: ...onvenient where multiple Switch stacks are installed so it is always clear which unit should be used to uplink Figure 4 3 Convert a Standalone Switch to a Stacked Switch Both Switches are now powered...

Страница 25: ...his case we can preserve all the same configuration settings by downloading the previously saved configuration files to the replacement Switch Before disconnecting the network connections of the origi...

Страница 26: ...When stacked in a star topology arrangement with the DGS 3312SR the Switch will automatically assume slave status The unit number is determined by the port number to which it is connected on the DGS 3...

Страница 27: ...ace After you have successfully installed the Switch you can configure the Switch monitor the LED panel and display statistics graphically using a web browser such as Netscape Navigator version 6 2 an...

Страница 28: ...et up the terminal plug the power cable into the power receptacle on the back of the Switch The boot sequence appears in the terminal 10 After the boot sequence completes the console login screen disp...

Страница 29: ...the Switch or changing its settings This section tells how to log onto the Switch NOTE The passwords used to access the Switch are case sensitive therefore S is not the same as s When you first conne...

Страница 30: ...he command prompt DES 3250TG 4 shown below Figure 5 3 Command Prompt NOTE The first user automatically gets Administrator level privileges It is recommended to create at least one Admin level user acc...

Страница 31: ...er Figure 5 4 Creation of a new Admin level account NOTICE CLI configuration commands only modify the running configuration file and are not saved when the Switch is rebooted To save all your configur...

Страница 32: ...be allowed to perform or be restricted from performing specific SNMP management functions The functions allowed or restricted are defined using the Object Identifier OID associated with a specific MIB...

Страница 33: ...s represent the IP address to be assigned to the IP interface named System and the y s represent the corresponding subnet mask Alternatively you can enter config ipif System ipaddress xxx xxx xxx xxx...

Страница 34: ...an SFP transceiver port Use your cabling requirements to select an appropriate SFP transceiver type Insert the SFP transceiver sold separately into the SFP transceiver slot Use the appropriate network...

Страница 35: ...console program Note This Web based Management Module does not accept Chinese language input or other languages requiring 2 bytes per character Login to Web Manager The first step in getting started i...

Страница 36: ...effective 3 A listing of all user accounts and access levels is shown in the User Account Management window This list is updated when Apply is executed Click Show All User Account Entries to access t...

Страница 37: ...y normal RAM and non volatile or NV RAM Configuration changes are made effective by clicking the Apply button When this is done the settings will be immediately applied to the switching software in RA...

Страница 38: ...hows the user interface The user interface is divided into 3 distinct areas as described in the table Area 1 Area 2 Area 3 Figure 6 6 Main Web Manager window Area Function 1 Presents a graphical near...

Страница 39: ...width SNTP Settings Port Security QoS MAC Notification LACP Access Profile Table System Log Servers PAE Access Entity and Layer 3 IP Networking Management Contains windows concerning configurations fo...

Страница 40: ...rt Configuration Port Mirroring Stack Setting Static ARP Settings IGMP Spanning Tree Forwarding Filtering VLANs Port Bandwidth SNTP Settings Port Security QoS LACP Access Profile Table System Log Host...

Страница 41: ...ter the IP address of the gateway If you will manage the switch from the subnet on which it is installed you can leave the default address in this field If no VLANs have been previously configured on...

Страница 42: ...0 and 255 This address should be a unique address on a network assigned to you by the central Internet authorities Subnet Mask A Bitmask that determines the extent of the subnet that the Switch is on...

Страница 43: ...installed and the switch s MAC Address assigned by the factory and unchangeable In addition the Boot PROM Version and Firmware Version numbers are shown This information is helpful to keep track of P...

Страница 44: ...ooping Disabled IGMP Snooping allows the switch to read the Multicast Group IP address and the corresponding MAC address from IGMP packets that pass through the switch It can be enabled globally by to...

Страница 45: ...and Line Interface or for a Telnet session Figure 7 4 Serial Port Settings window The Serial Port Settings window is used to change and view the Console settings for your switch The default Baud Rate...

Страница 46: ...he time between 1 and 2 147 483 647 seconds between MAC notifications The default setting is 1 second MAC Notification History Size The maximum number of entries listed in the history log used for not...

Страница 47: ...allows the port to automatically determine the fastest settings the port on the device connected to the DES 3250TG can handle and then use those settings The 10_auto setting allows the port to automa...

Страница 48: ...uto Toggle the Speed Duplex field to either select the speed and duplex half duplex state of the port Auto auto negotiation between 10 and 100 Mbps devices full or half duplex The Auto setting allows...

Страница 49: ...and To pull down menu to choose a port or range of ports to describe and Unit to choose the Switch in the switch stack and then enter a description of the port s Click Apply to set the descriptions in...

Страница 50: ...red to a slower port one of the 48 100 Mbps Fast Ethernet ports because many packets will be dropped The following fields can be set Parameter Description Source Port Allows multiple ports to be mirro...

Страница 51: ...ch When the stacking mode is enabled the Switch may function in a properly connected and configured Switch stack By default the Switch has the stacking mode enabled When enabled the stacking mode can...

Страница 52: ...witch Note that the stacking port is included in the total count Mode The field displays the method used to determine the stacking order of the Switches in the Switch stack Version The field displays...

Страница 53: ...dow will appear Figure 7 11 Static ARP Settings Add window The following fields can be set or viewed Parameter Description IP Address The IP address of the ARP entry MAC Address The MAC address of the...

Страница 54: ...specifies the length of time between sending IGMP queries Max Response Time Sets the maximum amount of time allowed before sending an IGMP response report A value between 1 and 25 seconds can be ente...

Страница 55: ...GMP query packets Non Querier will denote that the router is not sending out IGMP query packets This field will only read Querier when the Querier State and the State fields have been Enabled State Th...

Страница 56: ...on VID Displays the name of the VLAN ID the static router port belongs to VLAN Name Displays the name of the VLAN the static router port belongs to Member Ports Each port can be set individually as a...

Страница 57: ...ansition states disabled blocking or listening or in the RSTP port state discarding there is no functional difference the port is not active in the network topology Table 5 1 below compares how the tw...

Страница 58: ...ection of RSTP The protocol also provides for a variable used for migration in the event that legacy equipment on a segment is updated to use RSTP STP Switch Settings In the Configuration folder open...

Страница 59: ...4 to 30 seconds This is the time any port on the switch spends in the listening state while moving from the blocking state to the forwarding state Bridge Priority 0 65535 Sec 32768 A Bridge Priority f...

Страница 60: ...ello Time 1 second STP Port Settings The Spanning Tree Protocol STP operates on two levels on the switch level the settings are globally implemented On the port level the settings are implemented on a...

Страница 61: ...on of a group of ports This STP Group will use the switch level parameters entered above with the addition of Port Priority and Port Cost The STP Group spanning tree works in the same way as the switc...

Страница 62: ...o Select Yes or No Choosing Yes will enable the port to migrate from 802 1d STP status to 802 1w RSTP status RSTP can coexist with standard STP however the benefits of RSTP are not realized on a port...

Страница 63: ...of when editing Displays the VLAN ID the currently selected MAC address is a member of when editing an existing entry MAC Address Allows the entry of the MAC address of an end station that will be en...

Страница 64: ...ameter Description VID Allows the entry of the VLAN ID of the VLAN the MAC address below is a member of Multicast MAC Address Allows the entry of the multicast MAC address of an end station that will...

Страница 65: ...er Ingress port A port on a switch where packets are flowing into the switch and VLAN decisions must be made Egress port A port on a switch where packets are flowing out of the switch either to anothe...

Страница 66: ...capsulating Token Ring packets so they can be carried across Ethernet backbones and 12 bits of VLAN ID VID The 3 bits of user priority are used by 802 1p The VID is the VLAN identifier and is used by...

Страница 67: ...for IEEE 802 1Q VLAN support Go to the Configuration menu select the VLANs folder and click Static VLAN Entry to open the following window Figure 7 24 802 1Q Static VLANs window To delete an existing...

Страница 68: ...250TG Standalone Layer 2 Switch Figure 7 25 Add 802 1Q Static VLAN window To edit an existing 802 1Q VLAN click the corresponding Modify button on the 802 1Q Static VLANs window The following window w...

Страница 69: ...the Add window or for editing the VLAN name in the Modify window Advertisement Advertising can be enabled or disabled using this pull down menu Advertising allows members to join this VLAN through GV...

Страница 70: ...packet is different from the PVID of the port that is to transmit the packet the switch will drop the packet Within the switch different PVIDs mean different VLANs remember that two VLANs cannot commu...

Страница 71: ...tion port is a member of the 802 1Q VLAN If it is not the packet is dropped If the destination port is a member of the 802 1Q VLAN the packet is forwarded and the destination port transmits it to its...

Страница 72: ...D Link DES 3250TG Standalone Layer 2 Switch Figure 7 26 802 1Q Port Settings window The following fields can be set 62...

Страница 73: ...bar between Enabled and Disabled Enabled enables the port to compare the VID tag of an incoming packet with the PVID number assigned to the port If the two are different the port filters drops the pa...

Страница 74: ...ttings window To use the bandwidth feature enter the port or range of ports in the From and To fields The third field allows you to set the type of packets being received and or transmitted by the Swi...

Страница 75: ...ually easy to adapt a UDP TIME client implementation to operate using SNTP Moreover SNTP is also designed to operate in a dedicated server configuration including an integrated radio clock With carefu...

Страница 76: ...tion click SNTP Settings in the Configuration folder and then click Time Zone and DST Figure 7 29 Time Zone and DST Settings window This window allows you to set the Daily Saving Time repeated and ann...

Страница 77: ...ntered into the MAC address forwarding table can not be changed once the port lock is enabled The port can be locked by changing the Admin State pull down menu to Enabled and clicking Apply Figure 7 3...

Страница 78: ...earned MAC addresses in the forwarding table Lock Address Mode Delete On Reset Select Delete On Timeout to clear dynamic entries for the ports on timeout of the Forwarding Data Base FDB Specify Delete...

Страница 79: ...entries Enter the VLAN MAC address and port of the device that you want to delete from the port security entries table and click Delete Clear Port_security port is used to clear a range of ports from...

Страница 80: ...tted first Only when these queues are empty are packets of lower priority transmitted The weighted priority based scheduling alleviates the main disadvantage of strict priority based scheduling in tha...

Страница 81: ...sabled This field can be toggled between Enabled and Disabled using the drop down menu This enables or disables globally the Switch s reaction to Multicast storms triggered at the threshold set above...

Страница 82: ...r for a particular type of packet exceeds this threshold within one second then further packets of that type will be dropped 802 1p Default Priority The switch allows the assignment of a default 802 1...

Страница 83: ...witch Figure 7 33 802 1p default_priority Settings window This window allows you to assign a default 802 1p priority to any given port on the switch The priority queues are numbered from 0 the lowest...

Страница 84: ...Output Scheduling window The Max Packets O 255 field specifies the number of packets that a queue will transmit before surrendering the transmit buffer to the next lower priority queue in a round robi...

Страница 85: ...e Layer 2 Switch Traffic Segmentation This window allows you to manage traffic segmentation on the switch Click Traffic Segmentation in the QoS folder on the Configuration menu Figure 7 36 Traffic Seg...

Страница 86: ...rt is applied to all members of the link aggregation group Thus when configuring the ports in a link aggregation group you only need to configure the master port The DES 3250TG supports link aggregati...

Страница 87: ...port cost and in determining the state of the link aggregation group If two redundant link aggregation groups are configured on the switch STP will block one entire group in the same way STP will blo...

Страница 88: ...7 40 Port Link Aggregation Settings Modify window The following fields can be set Parameter Description Group ID 1 6 Allows the entry of a number used to identify the link aggregation group when addin...

Страница 89: ...t A trunking group must designate one port to allow transmission of broadcasts and unknown unicasts After setting the previous parameters click Apply to allow your changes to be implemented Successful...

Страница 90: ...Mode in the next field and then click Apply to let your changes take effect Configuring the Access Profile Table Access profiles allow you to establish criteria to determine whether the Switch will f...

Страница 91: ...der and click on the Access Profile Table link This will open the Access Profile Table page as shown below Figure 7 42 Access Profile Table To add an entry to the Access Profile Table click the Add bu...

Страница 92: ...the Switch to examine the VLAN identifier of each packet header and use this as the full or partial criterion for forwarding Source MAC Source MAC Mask Enter a MAC address mask for the source MAC addr...

Страница 93: ...rofile ID 1 255 Type in a unique identifier number for this profile set This value can be set from 1 255 Type Select profile based on Ethernet MAC Address IP address or packet content mask This will c...

Страница 94: ...ude according to the following guidelines Select ICMP to instruct the Switch to examine the Internet Control Message Protocol ICMP field in each frame s header Select Type to further specify that the...

Страница 95: ...hex 0x0 0xffff protocol id Enter a value defining the protocol ID in the packet header to mask Specify the protocol ID mask in hex form hex 0x0 0xffffffff Port The user may set the Access Profile Tabl...

Страница 96: ...mask packet headers beginning with the offset value specified The following fields are used to configure the Packet Content Mask Parameter Description Profile ID 1 255 Type in a unique identifier num...

Страница 97: ...to byte 47 value 48 63 Enter a value in hex form to mask the packet from byte 48 to byte 63 value 64 79 Enter a value in hex form to mask the packet from byte 64 to byte 79 Port The user may set the...

Страница 98: ...file Table Under the heading Access Rule clicking Modify will open the following window Figure 7 46 Access Rule Table window IP To create a new rule set for an access profile click the Add button A ne...

Страница 99: ...e the packet header Priority 0 7 This parameter is specified if you want to re write the 802 1p default priority previously set in the Switch which is used to determine the CoS queue to which packets...

Страница 100: ...ss mask for the destination IP address Protocol This field allows the user to modify the protocol used to configure the Access Rule Table depending on which protocol the user has chosen in the Access...

Страница 101: ...igure 7 50 Access Rule Configuration window Ethernet To set the Access Rule for Ethernet adjust the following parameters and click Apply Parameter Description Profile ID This is the identifier number...

Страница 102: ...erwise a packet will have its incoming 802 1p user priority re written to its original value before being forwarded by the Switch For more information on priority queues CoS queues and mapping for 802...

Страница 103: ...e the Access Rule for Packet Content Mask open the Access Profile Table and click Modify for a Packet Content Mask entry This will open the following screen Figure 7 52 Access Rule Table Packet Conten...

Страница 104: ...Packet Content Mask To set the Access Rule for the Packet Content Mask adjust the following parameters and click Apply Parameter Description Profile ID This is the identifier number for this profile...

Страница 105: ...examine the packet header Offset This field will instruct the Switch to mask the packet header beginning with the offset value specified value 0 15 Enter a value in hex form to mask the packet from th...

Страница 106: ...D Link DES 3250TG Standalone Layer 2 Switch Figure 7 54 Access Rule Display window Packet Content Mask 96...

Страница 107: ...x Port Based and MAC Based Access Control The IEEE 802 1x standard is a security measure for authorizing and authenticating users to gain access to various wired or wireless devices on a specified Loc...

Страница 108: ...ail Authentication Server The Authentication Server is a remote device that is connected to the same network as the Client and Authenticator however the Authentication Server can be on a different sub...

Страница 109: ...cator before access is granted to the Client The second purpose of the Authenticator is to verify the information gathered from the Client with the Authentication Server and to then relay that informa...

Страница 110: ...oftware that is compliant with the 802 1x protocol For users running Windows XP that software is included within the operating system All other users are required to attain 802 1x client software from...

Страница 111: ...which are 1 Port Based Access Control This method requires only one user to be authenticated per port by a remote RADIUS server to allow the remaining users on the same port access to the network 2 MA...

Страница 112: ...Once the connected device has successfully been authenticated the Port then becomes Authorized and all subsequent traffic on the Port is not subject to access control restriction until an event occur...

Страница 113: ...device that required access to the LAN The Switch would regard the single physical Port connecting it to the shared media segment as consisting of a number of distinct logical Ports each logical Port...

Страница 114: ...D Link DES 3250TG Standalone Layer 2 Switch Figure 7 65 First 802 1X Authenticator Settings window Click the selection button on the far left that corresponds to the port you want to configure 104...

Страница 115: ...t This displays whether a controlled Port that is unauthorized will exert control over communication in both receiving and transmitting directions or just the receiving direction PortControl From the...

Страница 116: ...q Select the maximum number of times to retry sending packets to the supplicant ReAuthPeriod Select the time interval between successive re authentications ReAuth ReAuth Enabled Enable or disable re a...

Страница 117: ...ch s 802 1x port based authentication select which ports are to be configured in the From and To fields Next enable the ports by selecting Authenticator from the drop down menu under Capability Click...

Страница 118: ...s you to initialize a port or group of ports The Initialize Port Table in the bottom half of the window displays the current status of the port s once you have clicked Apply This window displays the f...

Страница 119: ...ering it into the MAC Address field and checking the corresponding check box To begin the initialization click Apply NOTE The user must first globally enable 802 1X in the Advanced Settings window in...

Страница 120: ...x by MAC address in the Advanced Settings window Click Configuration Port Access Entity PAE System Control Reauthenticate Port s to open the following window Figure 7 71 Reauthenticate Port s for MAC...

Страница 121: ...ius Server 0 0 0 0 Set the RADIUS server IP Authentic Port 0 Set the RADIUS authentic server s UDP port The default is 1812 Accounting Port 0 Set the RADIUS account server s UDP port The default is 18...

Страница 122: ...nagement menu Figure 8 1 Security IP Management window Management stations are computers on the network that will be used to manage the switch You can limit the number of possible management stations...

Страница 123: ...ges including User additions or updates must be entered into non volatile ram using the Save Changes command on the Maintenance menu if you want these changes to be permanent SNMPV3 The DES 3250TG sup...

Страница 124: ...you want to configure To create a new entry click the Add button a separate window will appear Figure 8 5 SNMP User Table Configuration window To display the current SNMP User Table Configuration cli...

Страница 125: ...3 will be used If Encryption V3 only is checked configure also Auth Protocol In the Space provided type an alphanumeric sting of between 8 and 20 characters that will be used to authorize the agent to...

Страница 126: ...iew Table Configuration window Parameter Description View Name Type an alphanumeric string of up to 32 characters This is used to identify the new SNMP view being created Subtree OID Type the Object I...

Страница 127: ...9 SNMP Group Table window To delete an existing entry click the selection button in the Delete column on the far right that corresponds to the port you want to remove To create a new entry click the A...

Страница 128: ...es generated by the switch s SNMP agent Security Model Use the pull down menu to select the SNMP version Select one of the following SNMPv1 Specifies that SNMP version 1 will be used SNMPv2 Specifies...

Страница 129: ...e permitted to use the community string to gain access to the switch s SNMP agent An MIB view that defines the subset of all MIB objects that will be accessible to the SNMP community Read write or rea...

Страница 130: ...g the community string created with this command can only read the contents of the MIBs on the switch Read_Write Specifies that SNMP community members using the community string created with this comm...

Страница 131: ...hat SNMP version 2 will be used V3 To specify that the SNMP version 3 will be used Community String SNMPv3 User Name Type in the community string or SNMP V3 user name as appropriate SNMP Engine ID The...

Страница 132: ...ort Port Access Control The DES 3250TG provides extensive network monitoring capabilities that can be viewed under the Monitoring menu CPU Utilization The CPU Utilization displays the percentage of th...

Страница 133: ...l automatically refresh with new updated statistics The information is described as follows Parameters Description Time Interval 1s Select the desired setting between 1s and 60s where s stands for sec...

Страница 134: ...an be set Parameter Description Time Interval 1s Select the desired setting between 1s and 60s where s stands for seconds The default value is one second Record Number 200 Select number of times the S...

Страница 135: ...Layer 2 Switch Packets The Web Manager allows various packet statistics to be viewed as either a line graph or a table Six windows are offered Received RX Figure 9 3 Rx Packets Analysis window line gr...

Страница 136: ...alue is one second Record Number 200 Select number of times the Switch will be polled between 20 and 200 The default value is 20 Bytes Counts the number of bytes received on the port Packets Counts th...

Страница 137: ...e Layer 2 Switch View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table UMB cast RX Figure 9 5 Rx Packets Analysis window line graph for Unicast Multicas...

Страница 138: ...0 Select number of times the Switch will be polled between 20 and 200 The default value is 20 Unicast Counts the total number of good packets that were received by a unicast address Multicast Counts t...

Страница 139: ...is button instructs the Switch to display a table rather than a line graph View Line Chart Clicking this button instructs the Switch to display a line graph rather than a table Transmitted TX Figure 9...

Страница 140: ...cond Record Number 200 Select number of times the Switch will be polled between 20 and 200 The default value is 20 Bytes Counts the number of bytes successfully sent from the port Packets Counts the n...

Страница 141: ...cts the Switch to display a line graph rather than a table Errors The Web Manager allows port error statistics compiled by the Switch s management agent to be viewed as either a line graph or a table...

Страница 142: ...unts otherwise valid frames that did not end on a byte octet boundary UnderSize The number of frames detected that are less than the minimum permitted frame size of 64 bytes and have a good CRC Unders...

Страница 143: ...Show Hide Check whether or not to display CrcError UnderSize OverSize Fragment Jabber and Drop errors Clicking this button clears all statistics counters on this window View Table Clicking this butto...

Страница 144: ...default value is 20 ExDefer Counts the number of frames for which the first transmission attempt on a particular interface was delayed because the medium was busy LateColl Counts the number of times...

Страница 145: ...instructs the Switch to display a line graph rather than a table Size Packet Size The Web Manager allows packets received by the Switch arranged in six groups to be viewed as either a line graph or a...

Страница 146: ...ackets including bad packets received that were 64 octets in length excluding framing bits but including FCS octets 65 127 The total number of packets including bad packets received that were between...

Страница 147: ...256 511 512 1023 and 1024 1518 packets received Clear Clicking this button clears all statistics counters on this window View Table Clicking this button instructs the switch to display a table rather...

Страница 148: ...itch Figure 9 15 MAC Address Table window The following fields can be set Parameter Description VLAN ID Enter a VLAN ID for the forwarding table to be browsed by MAC Address Enter a MAC address for th...

Страница 149: ...N the port is a member of MAC Address The MAC address entered into the address table Port The port that the MAC address above corresponds to Learned How the switch discovered the MAC address The possi...

Страница 150: ...Snooping Group This allows the switch s IGMP Snooping table to be viewed IGMP Snooping allows the switch to read the Multicast Group IP address and the corresponding MAC address from IGMP packets that...

Страница 151: ...displayed Parameter Description Multicast Group The IP address of the multicast group MAC Address The MAC address of the multicast group Reports The total number of reports received for this group IGM...

Страница 152: ...Figure 9 18 IGMP Snooping Forwarding Table window Enter the VLAN ID for the desired IGMP Snooping Forwarding Table and click Search VLAN Status To view the VLAN Status click VLAN Status on the Monitor...

Страница 153: ...of the Router Port window A router port that is dynamically configured by the switch is located in the third and fourth rows To view the Router Port table click on the Router Port link on the Monitori...

Страница 154: ...D Link DES 3250TG Standalone Layer 2 Switch Figure 9 21 Authenticator Status window 144...

Страница 155: ...he switch s firmware click on the Maintenance folder and then the TFTP Services folder and finally click on the Download Firmware from TFTP Server link Figure 10 1 Download Firmware from Server window...

Страница 156: ...tiate the file transfer Upload Settings to TFTP Server To upload a configuration file for the switch click on the Maintenance menu and then the TFTP Services folder and finally click on the Upload Set...

Страница 157: ...ps in sequence that identify events on the switch The time since the last cold start of the switch is also recorded To view the switch history log click the Switch History link on the Maintenance menu...

Страница 158: ...r new settings have been saved to NV RAM Figure 10 7 Save Configuration window Once the switch configuration settings have been saved to NV RAM they become the default settings for the switch These se...

Страница 159: ...D Link DES 3250TG Standalone Layer 2 Switch Reboot Figure 10 8 Reboot window Reset Figure 10 9 Reset window Reset System Figure 10 10 Reset System window 149...

Страница 160: ...igure 10 11 Reset Config window Logout Figure 10 12 Logout Web Setup window Click Apply if you want to logout of the Web configuration program and return to the main page Appendix A Technical Specific...

Страница 161: ...0 ohm STP 100 m 2 pair UTP Cat 5 100 m EIA TIA 568 100 ohm STP 100 m IEC 793 2 1992 Type A1a 50 125um multimode Type A1b 62 5 125um multimode SC optical connector Number of Ports 48x 10 100 Mbps NWay...

Страница 162: ...Store and forward RAM Buffer 64M Bytes per device Filtering Address Table 8K MAC address per device Packet Filtering Forwarding Rate Full wire speed for all connections 148 800 pps per port for 100Mbp...

Страница 163: ...are enabled At this point packets are forwarded by the port Blocking State A port in the blocking state does not forward packets When the switch is booted a BPDU is sent to each port in the switch put...

Страница 164: ...s a different port is a better choice There is no address learning or packet forwarding from a port in the listening state A port in the listening state does the following Discards frames received fro...

Страница 165: ...ate A port in the learning state does the following Discards frames received from the network segment to which it is attached Discards packets sent from another port on the switch for forwarding Adds...

Страница 166: ...port in the forwarding state does the following Forwards packets received from the network segment to which it is attached Forwards packets sent from another port on the switch for forwarding Incorpo...

Страница 167: ...abled port does the following Discards packets received from the network segment to which it is attached Discards packets sent from another port on the switch for forwarding Does not add addresses to...

Страница 168: ...ng STP Spanning Tree Protocol Failure A failure in the STA generally leads to a bridging loop A bridging loop in an STP environment comes from a port that should be in the blocking state but is forwar...

Страница 169: ...or for a point to point link If one port is configured as a full duplex and the other port is left in auto negotiation mode the second port will end up in half duplex because ports configured as half...

Страница 170: ...emented in software and is thus reliant upon the speed of the CPU and other factors to converge If the CPU is over utilized it is possible that BPDUs may not be sent in a timely fashion STP is general...

Страница 171: ...le The simplest remedy is to manually disable all of the ports that provide redundant links Disabling ports one at a time and then checking for a restoration of the user s connectivity will identify t...

Страница 172: ...uct In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Warnung Dies ist ein Produkt der Klasse A Im Wohnbereich kann d...

Страница 173: ...nen l ngeren Zeitraum nicht benutzt sollten Sie es vom Stromnetz trennen Somit wird im Falle einer berspannung eine Besch digung vermieden 13 Durch die L ftungs ffnungen d rfen niemals Gegenst nde ode...

Страница 174: ...hase invoice must be provided If Purchaser s circumstances require special handling of warranty correction then at the time of requesting RMA number Purchaser may also propose special procedure as may...

Страница 175: ...pport at 1 877 453 5465 who will attempt to assist the customer in resolving any suspected defects with the product If the product is considered defective the customer must obtain a Return Material Au...

Страница 176: ...ts are designed to provide reasonable protection against harmful interference in a commercial installation This equipment generates uses and can radiate radio frequency energy and if not installed and...

Страница 177: ...ration Register online your D Link product at http support dlink com register Product registration is entirely voluntary and failure to complete or return this form will not diminish your warranty rig...

Страница 178: ...the user manual and other documentation provided to the purchaser at the time of purchase or as amended from time to time D LINK does not warrant that the products will operate uninterrupted or error...

Страница 179: ...Edgware Road Colindale London NW9 5 AB United Kingdom Telephone 44 020 8731 5555 Facsimile 44 020 8731 5511 www dlink co uk...

Страница 180: ...rhafter Bedienung d Versagen von Produkten oder Diensten die nicht von D LINK stammen oder nicht Gegenstand einer zum ma geblichen Zeitpunkt g ltigen Garantie oder Wartungsvereinbarung sind e Fehlgebr...

Страница 181: ...lisation du produit non conforme ses sp cifications ou aux interfaces requises c d une mauvaise manipulation d d une panne de biens ou de services acquis aupr s d une soci t tierce non D LINK ou qui n...

Страница 182: ...requisitos de la interfaz en el funcionamiento del producto c manejo incorrecto d errores en art culos o servicios ajenos a D LINK o no sujetos a una garant a o un contrato de mantenimiento vigentes...

Страница 183: ...equisiti di connessione c movimentazione impropria d guasto di prodotti o servizi non forniti da D LINK o non soggetti a una garanzia successiva di D LINK o a un accordo di manutenzione e impiego o co...

Страница 184: ...ck Avenue North Ryde NSW 2113 Australia TEL 61 2 8899 1800 FAX 61 2 8899 1868 URL www dlink com au India D Link House Kurla Bandra Complex Road Off CST Road Santacruz East Mumbai 400098 India TEL 91 0...

Страница 185: ..._____________________________ 4 What network operating system s does your organization use D Link LANsmart Novell NetWare NetWare Lite SCO Unix Xenix PC NFS 3Com 3 Open Banyan Vines DECnet Pathwork Wi...

Страница 186: ......

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