Troubleshooting LAN Emulation | Cabletron Systems 04-0053-01

Troubleshooting LAN Emulation

Troubleshooting

5.If working through these questions does not solve the problem, contact Cabletron Systems Customer Service. (see Appendix B, "Technical Support").

9.2TROUBLESHOOTING LAN EMULATION

You have configured an Emulated LAN and your network applications are not working. Use these questions and tests to help determine the cause of the problem.

1.Check for connectivity. Try pinging between end nodes. Ping from the ATM SmartSwitch (using ping) to its end nodes. If you cannot ping, check physical connectivity (disconnected cable and so on).

2.Execute the show lecs command on the switch that contains the LECS. If the LECS is down, start it by executing the start lecs command.

-If running distributed LANE services (LECS on one switch and LES and BUS on another switch) execute the show les command on the switch running the LES and BUS. If the LES and BUS are down, start the LES and BUS by executing the start les command.

3.Check IP routes and addresses.

•Use show route command to check the ATM SmartSwitch route table.

-Are the destination addresses correct for the specified gateways?

-Are there any routing loops?

-Are one or more of the destination addresses mapped to the wrong subnet?

•Use show client to check the ATM SmartSwitch local ELAN client.

-Does the client have the correct IP address?

-Is the subnet correct?

-Is the ATM address correct?

-Is the server type correct?

•Check end nodes configurations.

-Are end nodes configured correctly?

4.If the ELAN spans multiple switches, check the following:

-Is the LECS address correct on all switches?

-Can all switches reach the switch providing LECS support?

-If using the Well Known LECS Address, are all switches correctly mapped?

5.Check the LECS database.

•Use show lecselan to check the names and numbers of ELANs.

-Are ELAN names correct?

-Is the ATM address of the LES correct?

6.Check whether LES is connected.

•Use show lesclient to check whether devices are registered with the LES. If clients are registered, check end node configuration. If not registered, check multi-point signaling.

•Use set leselan to turn off multi-point signaling on a per-ELAN basis.

9-2 SmartSwitch ATM User Guide

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Cabletron Systems 04-0053-01 manual Troubleshooting LAN Emulation

Contents

SmartSwitch ATM Switch User Guide Part Number 04-0053-01 Rev. a Order Number Ii SmartSwitch ATM Switch User Guide FCC Class a Notice Application of Council Directives Manufacturer’s NameManufacturer’s Address Product Name Safety Information Class 1 Laser Transceivers Fiber Optic Protective Caps Regulatory Compliance Summary Safety Revision History Document Name Table of Contents Virtual Ports and Static Connections Index Table of Contents Xii SmartSwitch ATM User Guide List of Figures List of Figures Xiv SmartSwitch ATM User Guide List of Tables List of Tables Xvi SmartSwitch ATM User Guide Contents of the User Guide Introduction Smartswitch ATM Switch Differences IP Over ATM and Lane Creating AN IP Over ATM VlanIP address is for example only Subnet mask is for example only Creating an IP over ATM Vlan IP Over ATM and Lane Default ATM Addressing for IP over ATM Default Netprefix for SmartSwitch 2500 Family SwitchesDefault Netprefix for SmartSwitch Default IP Over ATM Local Client Address Creating AN Emulated LAN Ilmi SmartSwitch 2500 Family Default Lane Addressing ATM Addressing for LAN Emulation SmartSwitch 6500 Default Lane Addressing Lecs address is constructed fromChassis MAC address = 0020D4144180 Then CPU MAC address = 0020D4144180 Elan number = Then ELANs Across Multiple Switches Chassis MAC address = 00001DA3870B ThenChassis MAC address = 00001DA3870B Elan number = Then Switch Clients Distributed Lane ServicesJust for this example Use the add leselan command to create an LES on switch SW2 Specify the LES address on SW2 Elan Join Policies Best Effort Elan Join TestSW1 # show client By MAC Address By Route Descriptor Weight the policy at Lecselanlec TableUse ? to see possible types Lane Over WAN Circuits Physical Versus Logical BUS MulticastingNo MAC address is specified Elan is specified by Elan number Single PVP connection between clients and Lane services Using Lnni Lane Service Redundancy Lane Load Sharing Lnni Redundant LECSs on same network Lnni call set up load sharing Setting up Lnni LECs How Lnni handles Elan join requests SW1 # stop lecs SW1 # stop lesSW1 # set lnniinfo SW2# set lnniinfo On SW1, create an Elan in this example, we create elan1 Similarly, create the same Elan elan1 on SW2SW1 # add elan SW2 # add elan Configuring Lnni Distributed LES/BUS Servers SW2 # show elanSW1 # show lecsneighborinfo On switch SW3, use the set lnniinfo to configure Lnni SW3 # start les SW1 # show lecsserverlist LESPage Default Pnni Addressing SmartSwitch 2500 Family Default Node IDSmartSwitch 6500 Family Default Node ID Pnni Routing SmartSwitch 2500 Family Default Node ATM Address SmartSwitch 6500 Default Node ATM Address Connecting Multiple Peer Groups MULTI-LEVEL Pnni Topology SWA1 # set pnnipeergroupid Change the tenth byte to Do the same for switch SWB3 Specifies node numberHighest priority in election process Do the same on switch SWB3 SWB3 # set pnnipglelectionSWA3 # show pnnipglelection Physical Connections Between Peer Groups Adding Higher-level Peer Groups Adding a third Pnni node for next level connectivity SmartSwitch # show pnniinterface Managing Parallel Pnni Links Perform the same operation on switch SWB2 in group B 7b2 Link on switch SWA2 comes from this port4a3 Link on switch SWB2 comes from this port Aggregation Tokens Pnni Link Timing Aggregation token values and parallel links SmartSwitch # set linkmonitortimeout Routing Additional Routing ProtocolsIisp Routes This is an exterior route Iisp Routing Considerations Iisp Routing Example One Iisp Routing Example Two Set linkmonitortimeout Iisp Link Timing Take the default to make this an internal route UNI RoutesYes Advertise this address into the Pnni domain UNI Link Timing Administrative Weights Route MetricsCreating Route Metrics Create the outgoing member of the metric pair Create the incoming member of the metric pairEnter show pnnimetric to view the newly created metric pair IP Routing for Management 6b2Index tag of our metric pair 90.1.1.254 To see the route, enter the show route command on SW2 Route NET Table SmartSwitch # add trafficdescriptor Virtual Ports and Static ConnectionsPVC Connections Point-to-Point PVCs Point-to-Multipoint PVCs Specify first portSpecify its Vpci Specify its VCI Take the default values Perform for ports 7a3 and 7a4Set PCRCLP01 to zero Connecting to Local Switch Client Through a PVC Connect the end node to port 7a1 of the ATM SmartSwitchUse add ipatmclient to create an IP over ATM local client Set client number Turn off signaling PVP ConnectionsTurn off Ilmi Use the show pvp command to display the PVP connection 7b1See note below Specify the first port Connecting PVPs Virtual Ports7a1.3, 5b2.3, A1.3, C5.3, and so on Creating Virtual Ports Available VPIs = 2MaxVpiBits Default MaxVpiBits = Default MaxVciBits =Instance of set portconfig Set to 1 this translates to VPIs = 2 1-1 = .1 means our Base VPI is one VPIs used = Base VPI + 2 0 1 = 1 + 0 =MaxVciBits decrements by Specify virtual port number and Base VPI Things To Watch Out For When Creating Virtual Ports Soft PVC and PVP ConnectionsSoft PVC and Soft PVP differences Making Soft PVC and PVP Connections Creating a soft PVC SmartSwitch # add spvcaddress 6b3 Port on target switchSmartSwitch # show spvcaddress 7a1 Port on source switch 102 Creating a Soft PVP We use VPI= SmartSwitch # show spvp PortNumberALL Soft PVC and PVP Connections Traffic Management Traffic Management CapabilitiesTraffic Descriptors No Traffic Descriptor PeakCellRate CLP0+1PeakCellRate CLP0+1, PeakCellRate CLP0 PeakCellRate CLP0+1, PeakCellRate CLP0, Tag CLP = Call Admission Control Policy SmartSwitch # set caceqbwallocscheme SmartSwitch # set cacserviceclassbwUbr Queue Buffers CPU UBR 7a3 Corresponds to CBRMinIndex for SmartSwitch # show switchtrafficcongestion SmartSwitch # set switchtrafficcongestionEFCI, EPD, and RM Cell Marking Traffic Management Capabilities Firmware Upgrades and Bootline Commands Update Firmware CommandsUnsuccessful Update IP address of Tftp server Bootline Commands Enter the go command to start the ATM SmartSwitch=df s Accessing the Bootline Prompt Bootline Commands Explanations Changes the slave TSM/CPU to the master ScsmSwms Upgrading Boot Load firmware =df b Upgrading Post Diagnostic firmware Changing the Default Boot Load Image=chpi =df p Upgrading Switch Operating firmware Bootline CommandsFirmware Upgrades and Bootline Commands Start the ATM SmartSwitch by entering the go command Bootline Commands ATM Filtering and Clocking Port ATM Address FiltersCreating ATM Address Filters How ATM Address Filters Work ATM Address Filter Example Source and Destination Address Masks Port Clock Configuration Filter Considerations Regarding Lane and IP over ATMFFFFFFFFFFFFFFFFFFFF00000000000000000000 Network Clocking Troubleshooting Troubleshooting IP Over ATM Troubleshooting LAN Emulation Troubleshooting Pnni Links Switches in Same Peer GroupSwitches in Different Peer Groups Troubleshooting Congestion Diagnosing CongestionGlobal Congestion Fewer than 100 connections on a port Min = 64, Max = Port Congestion Events and Alarms Event Categories Viewing Events and Alarms SmartSwitch # set eventdisplay Deleting Events and Alarms SmartSwitch # set alarmdisplay Login name on the server PasswordSaving Core Dumps IP address of my Tftp server Saving Core Dumps Appendix a Agent Support MIB, SMI, MIB Files and Internet MIB Hierarchy CSI ZeitNet Proprietary MIBs MIB, SMI, MIB Files and Internet MIB Hierarchy Relation Between Object Identifier and the Represented Value Supported protocols Supported SMI FormatsCSI ZeitNet Proprietary MIB Groups Ctron ATM SmartSwitch MIB Support MIB ExceptionsNon-Conformance Managing AN ATM Smartswitch Console Commands that Affect the AgentNot Supported Default Community Strings Update firmware Backup Restore Reboot FAX Service Electronic ServicesAppendix B Technical Support Telephone Assistance Hardware Warranty Software WarrantyRepair Services Accessing the boot load prompt Index 12,4-4,4-6 Fail-over timing Route type parameter Iisp routing considerations ZnSwitchDiscoveryTable ZnPortTrafficCongTableMulti-level Pnni topology PNN Changing EPD thresholds Enabling RM cell marking Vlan