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3Com 3C16476A - Baseline Switch 2250, User Manual

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3Com 3C16476A - Baseline Switch 2250 User Manual Download Page 4

Backup Configuration

30

Restore Configuration

30

Firmware Upgrade

31

Initialize

31

Reboot

32

System Access

32

System Time

34

SNMP

34

Configuring VLANs

35

VLAN

36

Forwarding Tagged/Untagged Frames

39

Sample VLAN Configurations

40

Spanning Tree

41

IGMP Snooping

42

IGMP Query

42

Broadcast Storm

43

Configuring Port Settings

43

Administration

43

Speed/Duplex for 1000 Mbps Connections

45

Link Aggregation

45

Spanning Tree per Port

47

Port Mirroring

49

QoS VoIP Traffic Settings

50

Security

53

RADIUS Client

53

802.1X Settings

54

Monitoring

56

Address Table

56

Cable Diagnostics

56

5

T

ROUBLESHOOTING

Resetting to Factory Defaults

59

Forgotten Password

59

Forgotten Static IP Address

60

Solving LED Issues

60

If the Problem Persists

61

A

O

BTAINING

 S

UPPORT

 

FOR

 Y

OUR

 P

RODUCT

Register Your Product

63

Purchase Value-Added Services

63

Troubleshoot Online

63

Access Software Downloads

63

Telephone Technical Support and Repair

64

Contact Us

64

B

S

AFETY

 I

NFORMATION

Important Safety Information

67

C

T

ECHNICAL

 I

NFORMATION

Related Standards

69

Environmental

69

Physical

69

Electrical

69

G

LOSSARY

I

NDEX

R

EGULATORY

 N

OTICES

Summary of Contents for 3C16476A - Baseline Switch 2250

Page 1: ...http www 3com com Baseline Switch 2250 Plus User Guide Installationsanleitung 3C16476CS Part No 10015237 Rev AA Published August 2006 ...

Page 2: ...95 or FAR 52 227 14 June 1987 whichever is applicable You agree not to remove or deface any portion 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 ar...

Page 3: ...lacing Units On Top of Each Other 16 Supplying Power to the Switch 16 Checking for Correct Operation 16 Connecting a Network Device 17 Using SFP Transceivers 18 Approved SFP Transceivers 18 Inserting an SFP Transceiver 18 Removing an SFP Transceiver 19 Performing Spot Checks 19 3 CONNECTING TO THE WEB INTERFACE Requirements for Accessing the Web Interface 21 Running the Discovery Application 21 Lo...

Page 4: ...VoIP Traffic Settings 50 Security 53 RADIUS Client 53 802 1X Settings 54 Monitoring 56 Address Table 56 Cable Diagnostics 56 5 TROUBLESHOOTING Resetting to Factory Defaults 59 Forgotten Password 59 Forgotten Static IP Address 60 Solving LED Issues 60 If the Problem Persists 61 A OBTAINING SUPPORT FOR YOUR PRODUCT Register Your Product 63 Purchase Value Added Services 63 Troubleshoot Online 63 Acce...

Page 5: ... World Wide Web site http www 3com com Conventions Table 1 and Table 2 list conventions that are used throughout this guide Table 1 Notice Icons Icon Notice Type Description Information note Information that describes important features or instructions Caution Information that alerts you to potential loss of data or potential damage to an application system or device Warning Information that alert...

Page 6: ...tions are very important to us They will help make our documentation more useful to you Please e mail comments about this document to 3Com at pddtechpubs_comments 3com com Please include the following information when con tacting us Document title Document part number on the title page Page number if appropriate Example 3Com Baseline Switch 2250 Plus User Guide Part number 10015237 Page 25 Please ...

Page 7: ...e SFP transceiver slots on the front panel Use these SFP transceiver slots for easy flexible connection to fiber based Gigabit media While there are four physical Gigabit ports only a maximum of two can be operational at any given time Autosensing of MDI MDIX Connections All ports on the Switch can autosense both medium dependent interface MDI and medium dependent interface crossover MDIX connecti...

Page 8: ...priority traffic is forwarded on a different queue from lower priority traffic and is given preference over that traffic This ensures that time sensitive traffic gets the highest level of service The 802 1D standard specifies eight distinct levels of priority 0 to 7 each of which relates to a particular type of traffic The priority levels and their traffic types are shown in the following table Ta...

Page 9: ...or unshielded data cables with shielded or unshielded jacks can be connected to these data sockets AVERTISSEMENT Points d accès RJ 45 Ceux ci sont protégés par des prises de données Ils ne peuvent pas être utilisés comme prises de téléphone conventionnelles standard ni pour la connection de l unité à un réseau téléphonique central privé ou public Raccorder seulement connecteurs de données RJ 45 sy...

Page 10: ... is active the associated RJ 45 port of the same number is disabled The 1000BASE T RJ 45 ports support automatic MDI MDI X operation so you can use straight through or crossover cables for all network connections to workstations or servers or to other switches or hubs The two SFP ports support fiber Gigabit Ethernet short wave SX and long wave LX SFP transceivers in any combination This offers you...

Page 11: ...e Status Meaning Green Link established operating at 1000 Mbps Yellow Link established operating at 10 or 100 Mbps Flashing Green Packets are being received or transmitted on the port at 1000 Mbps Flashing Yellow Packets are being received or transmitted on the port at 10 or 100 Mbps Status Meaning Flashing Yellow to Green Port disabled or link loopback error Off Link not established either nothin...

Page 12: ...on refer to Resetting to Factory Defaults on page 59 Package Contents The 3Com Baseline Switch 2250 Plus package includes the following items One 3Com Baseline Switch 2250 Plus unit One power cord Four standard height self adhesive rubber pads One mounting kit One CD ROM which contains this User Guide and the 3Com Discovery application One warranty flyer Before installing and using the Switch veri...

Page 13: ...m Switch entfernen oder dem Switch hinzufuegen oder Instandhaltungsarbe iten verrichten lesen Sie die Sicherheitsanweisungen die in Appendix B Anhang B in diesem Handbuch aufgefuehrt sind Positioning the Switch The Switch is suitable for use in an office environment where it can be free standing or mounted in a stan dard 19 inch equipment rack Alternatively the Switch can be rack mounted in a wiri...

Page 14: ...Feuchtigkeit in das Gehäuse eindringen kann Die Luftzirkulation um den Switch und durch die Öffnungen des Gehäuses nicht behindert wird 3Com empfiehlt das Sie 25mm 1 Inch Zwischenraum sicherstellen Die Luft so frei wie möglich von Staub ist Es unwahrscheinlich ist das die Betriebstemperatur überschritten wird 3Com empfiehlt das Sie den Switch in einer sauberen klimatisierten Umgebung installieren ...

Page 15: ...i der Montage der Baugruppe beachten Sie die Anweisungen aus Aufstellen des Switch Der Switch ist eine Baueinheit hoch und passt in einen Standard 19 Zoll Baugruppenträger ACHTUNG Entfernen Sie alle Kabel bevor Sie fort fahren Entfernen Sie die selbstklebenden Polster Füße von der Unterseite der Baugruppe falls diese bereits angebracht sind 1 Plazieren Sie die Baugruppe aufrecht auf einer harten e...

Page 16: ...is con nected to earth ground during normal use Installing proper grounding helps to avoid damage from light ning and power surges Before powering on the Switch verify that network cables and the power cable are securely connected CAUTION The Switch has no ON OFF switch the only method of connecting or disconnecting main power is by connecting or disconnecting the power cord To power on the Switch...

Page 17: ...ength for each connection is not longer than 100 m 328 ft Figure 3 Connecting Devices to the Switch To connect a device to the Switch 1 Connect one end of the cable to an RJ 45 port on the Switch 2 Connect the other end to the appropriate RJ 45 port on the connecting device For 1000BASE T operation 3Com recommends using Category 5e or 6 cables Yellow Power on self test or loopback test failed This...

Page 18: ...FP transceiver that is not supported the Switch will not recognize it Inserting an SFP Transceiver To be recognized as valid the SFP transceiver must be one of the following 1000BASE SX SFP transceiver Use this transceiver to connect the Switch directly to a multimedia fiber optic cable 1000BASE LX SFP transceiver Use this transceiver to connect the Switch directly to a single mode fiber optic cab...

Page 19: ...emove an SFP transceiver 1 Disconnect the cable from the transceiver 2 Move the wire release lever downwards until it is pointing toward you 3 Pull the wire release lever toward you to release the catch mechanism The SFP transceiver should slide out easily Performing Spot Checks At frequent intervals you should visually check the Switch Regular checks can give you an early warning of a possible fa...

Page 20: ...20 CHAPTER 2 INSTALLING THE SWITCH ...

Page 21: ...nts for Accessing the Web Interface To connect to the Web interface you need the following The Discovery application which is included on 3Com Baseline Switch 2250 Plus CD ROM that is supplied with your Switch A computer that is connected to the Switch and that has a Web browser Running the Discovery Application The 3Com Baseline Switch 2250 Plus CD ROM contains among others the Discovery applicat...

Page 22: ...ck Next If the computer has only one adapter click Next Discovery searches the network for 3Com devices When detection is complete the Discovered Devices screen displays detected network devices Figure 6 Discovered Devices Screen 3 On the Discovered Devices screen click Baseline Switch 2250 Plus and then click Next The Completing the 3Com Discovery Application screen appears 4 Click Finish The log...

Page 23: ...Logon Dialog Box To log on to the Web interface 1 In User name type admin 2 Leave the Password field blank 3 Click OK Navigating the Web Interface The Web interface has been designed to enable you to easily perform advanced configuration tasks and view information about the Switch Menu The menu is located on the left side of the Web interface When you click an item on the menu the related screen a...

Page 24: ...perform system reboot System Access Contains tabs that allow you to Display user summary information Create a new user Modify existing users Remove existing users System Time Allows you to set the system time SNMP Contains tabs that allow you to Display SNMP summary information Enable or disable SNMP Add community strings Remove community strings Device Configures the device VLAN Contains tabs tha...

Page 25: ...s VoIP Traffic Setting Contains tabs that allow you to Display Voice VLAN summary Configure Voice VLAN global settings Configure Voice VLAN port settings Display port information for Voice VLAN and Trunk details Display OUI summary Add or remove OUI Security Configures security settings Radius Client Contains tabs that allow you to Display Radius Client information Configure Radius Client settings...

Page 26: ...he IP address that the Switch will assign to itself during auto IP configuration check the sticker on the base of the Switch This sticker contains the MAC address and default IP address of the Switch DHCP Assigned IP Address If you set the IP address mode to DHCP check the DHCP server for the IP address that is assigned to the Switch and then use that IP address to access the Web interface For exa...

Page 27: ...assword to the Web interface Assign an IP address to the Switch Configure the Switch s advanced features Upgrade the firmware Device Summary Information The Device Summary screen which automatically loads after you log on to the Web interface provides a snapshot of the Switch s basic settings and versions of current components Click Device Summary on the menu A screen appears with three tabs that ...

Page 28: ...nterval Enter the interval in seconds you would like the Switch to refresh Range 10 to 180 seconds 0 to disable polling Figure 10 Device View To set the polling interval 1 Click the Device Summary menu click Polling Interval tab 2 Enter a number between 10 to 180 seconds for the polling interval Enter a 0 to disable polling Color Key Description of the color coding Figure 11 Color Key ...

Page 29: ...t IP address of the Switch To detect its IP information using the automatic configuration process the Switch goes through the following sequence of steps 1 The Switch tries to configure itself with the default IP address 169 254 x y where x and y are converted from the last two bytes of its MAC address For example if the MAC address is 08004E000102 the IP address would be 169 254 1 2 This address ...

Page 30: ...iguration settings 1 Click Administration then Backup Configuration on the menu The Backup Configuration screen appears Figure 13 Backup Configuration 2 Click OK You will be prompted to provide a location where the configuration file will be saved Restore Configuration To reload configuration settings that you previously saved to a file 1 Click Administration then Restore Configuration on the menu...

Page 31: ...s completed the Switch will restart Although the upgrade process has been designed to preserve your configuration settings 3Com recommends that you make a backup of the configuration beforehand in case the upgrade process fails for any reason for example the connection between the computer and the Switch is lost while the new firmware is being copied to the Switch A progress screen displays while ...

Page 32: ...tabs User Summary Create User Modify User Remove User To prevent unauthorized users from accessing the Web interface and modifying the Switch s settings the interface is password protected The default admin account settings are User name admin Password blank no password To ensure that unauthorized users do not access the Web interface 3Com recommends that you set an admin password when you first c...

Page 33: ...e access level and password for that user Figure 17 CreateUser Screen Modify User This page allows you to modify a user s access level and password Figure 18 Modify User Screen Remove User To remove a user from the Switch click on the user name then click Remove Figure 19 Remove User Screen ...

Page 34: ...ith SNMP includes switches routers and host computers SNMP is typically used to configure these devices for proper operation in a network environment as well as to monitor them to evaluate performance or detect potential problems Click Administration then SNMP on the menu A screen appears with four system access tabs Summary Setup SNMP Add SNMP Remove Summary Displays the list community access str...

Page 35: ... can use the Switch to create VLANs to organize any group of ports into separate broadcast domains VLANs confine broadcast traffic to the originating group and help eliminate broadcast storms in large networks This also provides for a more secure and cleaner network environment You can create up to 64 VLANs add specific ports to a chosen VLAN so that the port can only communicate with other ports ...

Page 36: ... examples on setting up VLANs refer to Sample VLAN Configurations CAUTION At least one port must always be an untagged member of VLAN 1 the management VLAN If you choose to connect all ports to VLANs other than VLAN 1 you will no longer be able to access the Web interface If this happens you will need to reset the Switch to factory settings By default all ports belong to VLAN 1 as an untagged memb...

Page 37: ...ciated with a single port Tagged Untagged 4 Select ports to associate with the membership then click Apply Modify Port Use the Modify Port screen to modify the VLAN membership of a port Figure 27 Modify Port Screen 1 Select a membership use Available options for each port include only one option can be associated with a single port Not a member Tagged Untagged 2 Select a port to associate with the...

Page 38: ...lect 2 From the list of selected VLANs choose a VLAN to rename Enter a new VLAN name and click Apply Remove Use the Remove screen to remove a VLAN Figure 29 Remove Screen 1 Enter a set of VLANs or select all VLANs to add to the remove list then click Select 2 From the list of selected VLANs choose a VLAN to remove or click the Select All button to select all the VLANs Click Remove to remove the VL...

Page 39: ...Figure 31 VLAN Detail Screen Forwarding Tagged Untagged Frames Each port on the Switch is capable of passing tagged or untagged frames The following describes how the Switch will handle tagged and untagged frames When a port receives a tagged frame with a VLAN ID and the port is a member untagged or tagged of that VLAN the frame is accepted Otherwise the if the port is not a member of that VLAN th...

Page 40: ...gure 32 so that the ports on the default VLAN1 and the ports on VLAN2 cannot communicate with each other do the following 1 Create a new VLAN and set the VLAN ID to 2 Refer to Setup for instructions VLAN1 is the default VLAN and already exists 2 Set ports 1 3 and 26 to associate with the Untagged membership in VLAN2 3 Click Apply Ports 1 3 and 26 now belong to VLAN2 and will not communicate with a...

Page 41: ...tworks and can be used to detect and disable network loops The spanning tree ensures that the optimal path is maintained between spanning tree compliant networked devices by Disabling redundant paths when the main paths are operational Enabling redundant paths if the main paths fail Spanning tree uses a distributed algorithm to select a bridging device that serves as the root of the spanning tree ...

Page 42: ...ecific multicast service It identifies the ports containing hosts requesting to join the service and sends data out to those ports only It then propagates the service request up to any neighboring multicast switch router to ensure that it will continue to receive the multicast service This procedure is called multicast filtering The purpose of IP multicast filtering is to optimize a switched netwo...

Page 43: ...ld Sets the broadcast storm threshold 64 to 1000000 kilobits per second Figure 37 Broadcast Storm Setup Screen Configuring Port Settings Using the Web interface you can configure the speed duplex flow control link aggregation and port mirroring settings of each port You can also view the current connection status of each port or shut down or disable ports The Port menu includes five items Administ...

Page 44: ...l for the entire Switch When flow control is enabled the Switch regulates the packet flow so that a sending device does not transmit more packets than a receiving device can process If flow control is disabled packets may be dropped under certain periods of high traffic Flow control is disabled by default Speed Sets the speed mode of the port Available options include auto 10 100 and 1000 For 1000...

Page 45: ...negotiate for a link manually set on this switch to full duplex they will always negotiate to half duplex resulting in a duplex mismatch This can result in a significant reduction in network performance If you are unsure of how to configure the speed duplex setting simply enable autonegotiation for the port You cannot modify the speed duplex settings of ports that are members of a trunk or aggrega...

Page 46: ...mmunication mode that is speed duplex mode and flow control Four tabs are available on the Port Link Aggregation page Summary Create Modify Remove Summary Use the Summary tab to display Group ID Port members and Link Type for a list of link aggregate groups Figure 41 Link Aggregation Summary Screen Create Use the Create tab to add ports to a group membership Figure 42 Link Aggregation Create Scree...

Page 47: ...p to remove 2 Click Remove Spanning Tree per Port This administrative tool supports the configuration of the Switch to forward or block and discard 802 1D spanning tree BPDU packets Spanning tree is a bridge based system for providing fault tolerance on networks and can be used to detect and disable network loops The spanning tree ensures that the optimal path is maintained between spanning tree c...

Page 48: ...ions with other bridges to reconfigure the network to re establish a valid network topology After all the bridges on the network have determined the configuration of their ports each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each network segment All other ports are blocked which means that they are prevented from forwarding traffic Th...

Page 49: ...priority the device with the lowest MAC address will then become the root device If you modify any of these settings click Apply to save your changes Figure 47 Spanning Tree Setup Screen Port Mirroring The Switch allows you to monitor traffic going in and out of a particular port For traffic monitoring to work you need to attach a network analyzer to one port and use it to monitor the traffic of o...

Page 50: ...ect the port number under Analyser Port to which you connected the network analyzer Traffic to and from the selected mirrored ports will be forwarded to this port 5 Under Mirror Type select to monitor incoming traffic outgoing traffic or both 6 Click Apply QoS VoIP Traffic Settings Using the Web interface you can configure the Voice over Internet Protocol VoIP settings The QoS VoIP Traffic Setting...

Page 51: ...ure a Voice VLAN Figure 50 QoS VoIP Setup Screen Port Setup Use the Port Setup tab to configure the port or trunk setting for Voice VLAN The following options are available Voice VLAN Port Mode Select between None Manual or Auto Voice VLAN Port Security Enable or disable the security To configure the Voice VLAN settings for the ports 1 Select Voice VLAN Mode and Security settings 2 Select the port...

Page 52: ...dify Use the OUI Modify tab to add to the list of Organizational Unique Identifier The following options are available Telephony OUI Input a new company identifier to add to the list Description Input a description for the new company identifier To add to the OUI list 1 Enter a Telephony OUI and description 2 Click Add To remove an OUI from the list 1 Select a Telephony OUI from the list 2 Click R...

Page 53: ... each user or group that require management access to a switch The RADIUS Client menu includes two tabs Detail Configure Detail Use the Detail tab to display the RADIUS Client settings Figure 55 RADIUS Client Detail Screen Configure Use the Configure tab to configure the RADIUS settings The following parameters are available Max Retries Sets the number of retries of sending authentication requests...

Page 54: ...uthorized access to a network by requiring users to first submit credentials for authentication The 802 1X settings menu includes three tabs Summary Detail Setup Summary Use the Summary tab to display the 802 1X authentication settings Figure 57 802 1X Summary Screen Detail Use the Detail tab to display detailed 802 1X authentication information for a port Figure 58 802 1X Detail Screen ...

Page 55: ...et to the client before it times out the authentication session Range 1 10 Default 2 Mode Reauthentication Sets the client to be re authenticated after the interval specified by the Re authentication Period Re authentication can be used to detect if a new device is plugged into a switch port Default Disabled Max Count The maximum number of hosts that can connect to a port when the Multi Host opera...

Page 56: ...ation You can query by selecting a port choosing a VLAN or entering in a MAC Address then click Select Figure 60 Address Table Screen Cable Diagnostics The Switch provides cable diagnostic which helps you detect and resolve issues with the attached cables The Cable Diagnostics menu includes two tabs Summary Diagnostics Summary Use the Summary tab to display information on Test Result Cable Fault D...

Page 57: ...Monitoring 57 Diagnostics Use the Diagnostics tab to display individual port information on Test Result Cable Fault Distance and Last Update Figure 62 Cable Diagnostic Screen ...

Page 58: ...58 CHAPTER 4 CONFIGURING THE SWITCH ...

Page 59: ...p of a pen or a similar object press the Recovery button on the rear panel of the Switch See Figure 1 for illustration 2 Power off the Switch and then power it back on while keeping the Recovery button pressed 3 Release the Recovery button 4 Reset the Switch either by Accessing the Web interface using Discovery and then pressing the RESET button on the Initialize tab of the Administration menu Aft...

Page 60: ...n s network interface is installed and configured correctly The correct category of cable is being used for the required link speed Category 3 cables can be used for 10BASE T operation only Category 5 cable is required for 100BASE TX or 1000BASE T 3Com recommends Category 5e or 6 cables for 1000BASE T operation A fiber cable is connected but the Module Active LED is off Verify that The fiber cable...

Page 61: ... was connected to that port is introducing an excessive amount of broadcast frames to the network Some pieces of network equipment operate by sending out broadcast frames regularly Refer to the documentation that accompanies the device for information on disabling the broadcast operation If the Problem Persists If the problem persists and the unit still does not operate successfully contact your 3...

Page 62: ...62 CHAPTER 5 TROUBLESHOOTING ...

Page 63: ...re upgrades onsite assistance or advance hardware replacement Experienced engineers are available to manage your installation with minimal disruption to your network Expert assessment and implementation services are offered to fill resource gaps and ensure the success of your networking projects More information on 3Com maintenance and Professional Services is available at http www 3com com Contac...

Page 64: ...umber and serial number Proof of purchase if you have not pre registered your product A list of system hardware and software including revision level Diagnostic error messages Details about recent configuration changes if applicable To send a product directly to 3Com for repair you must first obtain a return authorization number RMA Products sent to 3Com without authorization numbers clearly marke...

Page 65: ... 6348 Europe Middle East and Africa Telephone Technical Support and Repair From anywhere in these regions call 44 0 1442 435529 From the following countries you may use the numbers shown Austria Belgium Denmark Finland France Germany Hungary Ireland Israel Italy Luxembourg Netherlands Norway Poland Portugal South Africa Spain Sweden Switzerland U K 01 7956 7124 070 700 770 7010 7289 01080 2783 082...

Page 66: ... 800 998 2112 1 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 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 4894 1888 AT T 800 998 2112 1 800 998 2112 AT T 800 998 2112 1 800 998 2112 AT T 800 998 2112 AT T 800 998 2112 57 1 657 0888 Country Telephone Number You can also obtain support in this region using ...

Page 67: ...he 3Com Switch Family Safety and Regulatory Informa tion manual included with this product You can find the 3Com Switch Family Safety and Regulatory Information manual on the product CD ROM that was included with your switch You can also download the safety manual from the 3Com Web site www 3Com com ...

Page 68: ...68 APPENDIX B SAFETY INFORMATION ...

Page 69: ...issions EN 55022 Class A FCC Part 15 Subpart B Class A ICES 003 Class A VCCI Class A AS NZS 3548 Class A CNS 13438 Class A Immunity EN 55024 Operating Temperature 0 40 C 32 104 F Humidity 0 95 non condensing Standard EN 60068 IEC 68 various parts Width 440 mm 17 3 in Depth 215 mm 8 5 in Height 41 mm 1 6 in or 1U Weight 3 1 kgs 6 83 lbs Mounting Free standing or 19 in rack mounted using the mountin...

Page 70: ...70 APPENDIX C TECHNICAL INFORMATION ...

Page 71: ...alf duplex Autonegotiation is defined in the IEEE 802 3 standard for Ethernet and is an operation that takes place in a few milliseconds Autonegotiation must be enabled for the 1000BASE T ports to operate at 1000 Mbps full duplex bandwidth The information capacity measured in bits per second that a channel can transmit The bandwidth of Ethernet is 10 Mbps the bandwidth of Fast Ethernet is 100 Mbps...

Page 72: ... NT Server Ethernet A LAN specification developed jointly by Xerox Intel and Digital Equipment Corporation Ethernet networks use CSMA CD to transmit packets at a rate of 10 Mbps and 100 Mbps over a variety of cables Ethernet address See MAC address Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps Gigabit Ethernet An Ethernet system that is designed to operate at 1000 Mbps f...

Page 73: ...work number and a host number or a network number a subnet number and a host number IP Address Internet Protocol Address A unique identifier for a device attached to a network using TCP IP The address is written as four octets separated with periods full stops and is made up of a network section an optional subnet section and a host section LAN Local Area Network A network of end stations such as ...

Page 74: ...work services such as computer files and printer queues SFP Small Form Factor Pluggable SFP Connectors are based on an open standard that enables hot swapping of various types of fiber optic and copper based transceivers into the host equipment subnet address An extension of the IP addressing scheme that allows a site to use a single IP network address for multiple physical networks subnet mask A ...

Page 75: ...e destination network traffic monitoring Enables the monitoring of port traffic by attaching a network analyzer to one switch port in order to monitor the traffic of other ports on the Switch trunking A method which specifies how to create a single high speed logical link that combines several lower speed physical links VLAN Virtual LAN A collection of network nodes that share the same collision d...

Page 76: ...76 GLOSSARY ...

Page 77: ...n password 59 free standing 14 front panel Link Activity LEDs 10 Module Active LEDs 11 Power LED 12 RJ 45 ports 11 self adhesive pads 12 SFP ports 10 full duplex 72 G Gigabit Ethernet 72 H half duplex 72 I IEEE 72 IETF 73 installing 13 IP address auto configuration 29 modifying 29 IP defined 73 L LAN defined 73 LED issues 60 LEDs Link Activity 10 Module Active 11 Power 12 link aggregation 45 local...

Page 78: ...0 SFP transceivers 18 approved supported 18 inserting 18 removing 19 spot checks 19 subnet mask 74 switch defined 74 T TCP IP 73 defined 74 traffic 75 monitoring 49 troubleshooting 59 forgotten IP address 59 forgotten password 59 LED related issues 60 POST failed 17 trunking See link aggregation U user name default 32 V viewing status information 27 VLANs 35 creating 41 maximum supported 35 sample...

Page 79: ...ures Reorient the receiving antenna Relocate the equipment with respect to the receiver Move the equipment away from the receiver Plug the equipment into a different 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 pr...

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