Enterasys Networks ENTERASYS ATX manual ATX Port Mirroring

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Chapter 6

ATX Port Mirroring

Using Port MIrroring; conﬁguring port mirroring locally; conﬁguring port mirroring remotely

The Port Mirroring utility allows you to capture network trafﬁc appearing on one or more of the ATX’s ports, and to reproduce that trafﬁc on a designated “diagnostic” port for monitoring purposes. The diagnostic port may be another of the ATX’s ports (Ethernet, Token Ring, or FDDI), or a remote port on another ATX in your network.

The Port Mirroring window (Figure 6-1) allows you to deﬁne port mirrors and specify a diagnostic port. If mirrored packets are to be sent to a remote diagnostic port, this window is also used to conﬁgure the remote ATX to direct mirrored packets to the desired diagnostic port in its domain.

Port mirroring introduces a certain amount of latency to the switch’s trafﬁc, depending upon the load at the mirrored ports, the types of packets being captured, and whether the diagnostic port is local or remote. To remedy this situation, you can establish “mirror ﬁlters” using the ATX’s Port Filtering utility. Mirror ﬁlters are especially helpful when you are using a remote diagnostic port, since the physical connection to the remote port imposes bandwidth constraints on the mirrored trafﬁc. Using a mirror ﬁlter you can restrict the amount of monitored trafﬁc by ﬁltering inbound or outbound packets according to source and destination addresses, vendors, types, and frame protocols. You can also ﬁlter out packets based on a designated portion of their data ﬁeld. Mirror ﬁlters can also be used when you are using a local diagnostic port, if necessary. See Chapter 4, Using ATX Port Filtering, for details on deﬁning mirror ﬁlters.

The Port mirroring window also allows you to discard or truncate oversized packets when using a local diagnostic port.

NOTE

When mirroring trafﬁc to a remote diagnostic port, the mirrored packets are encapsulated and routed to the speciﬁed port. Oversized packets are segmented during this process, and therefore do not need to be discarded or truncated.

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Contents ATX User’s Guide Page Virus Disclaimer Page Restricted Rights Notice Page Contents Chapter ATX Port Mirroring Chapter Using ATX TrunkingChapter Using ATX Port Filtering Chapter Workgroup ConﬁgurationIntroduction Related Manuals Using the ATX Switch User’s GuideSoftware Conventions Common ATX Switch Window FieldsUsing Window Buttons Getting Help Using On-line HelpGetting Help from the Global Technical Assistance Center Login ATX Switch Chassis View Viewing Chassis Information ATX Switch Chassis ViewConnection Status Front Panel InformationPort Status Menu Structure Boot PromFirmware Port Status Menu Device MenuHelp Menu Utilities MenuPPE Module Menu Port Menu Port Status DisplaysModule Menu PPE Port MenuStatus Selecting a Port Status ViewPort Status Color Codes Viewing Hardware Types Chassis Manager WindowInterface Description Module Type Text BoxesIPX Routing Managing the HubSelecting the Frame Type for a Port Conﬁguring IPX Routing on a portIP Conﬁg/Routing window IP RoutingConﬁguring IP Routing on a Port Conﬁguring the IP Address TableIndex Port IP MaskBroadcast Protection Port ConﬁgurationBridge Port Conﬁguration Local SwitchingRing Speed 11. Bridge Conﬁguration window Setting the Bridge ModeBridge Number Transmitting BPDUsSource Route Conﬁguration Ring NumberToken Ring Translation Setting the Spanning Tree Explorer ModeIPX Source Route IPX FramingARP Translate ARP Source Route Netbios Source RouteTo set the Token Ring Translation Parameters Viewing I/F Summary Information Using the Find Source Address FeatureLogical Status IndexRaw Counts Interface Performance Statistics/Bar GraphsViewing Interface Detail RateNon-Unicast DescriptionAddress UnicastMaking Sense of Detail Statistics Enabling and Disabling Ports Administratively Enabling and Disabling PortsATX Switch Chassis View Managing the Hub Using ATX Trunking State Port Trunking WindowRmt Bridge Id Last ErrorRmt IP Address Last Change Enabling and Disabling TrunkingLink Ordinal Link CountUsing ATX Trunking Using ATX Trunking Port Trunking Window Using ATX Port Filtering Using ATX Port Filtering Protocol Port Filters Table InformationId Identiﬁer PseudoEditing the Port Filters Table Adding a New Filter Using ATX Port Filtering Using ATX Port Filtering Using ATX Port Filtering Using ATX Port Filtering Packets Viewing Filter StatisticsDeleting a Port Filter Last Frame AddressWorkgroup Conﬁguration Workgroup Conﬁguration Virtual Workgroups Window Total Conﬁguring a WorkgroupDeleting a Workgroup Workgroup Conﬁguration Conﬁguring a Workgroup ATX Port Mirroring ATX Port Mirroring Port Mirroring WindowConﬁguring Port Mirroring If the ports being mirrored are remote From the device where the mirrored ports are locatedFrom the device where the diagnostic port is located ATX Port Mirroring Port Mirroring Window IPX Routing Tables IPX Network IPX StatisticsIPX Interface Port#IPX Route Tick Count Hop CountNext Hop AgeSocket NodeIDIPX Routing Tables Index Index-2 Index-3 Index Index-4