Cabletron Systems 9A100 manual Troubleshooting IP Over ATM

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5 TROUBLESHOOTING

This chapter provides basic troubleshooting for diagnosing and fixing problems with VLAN, emulated LANs, and ATM traffic congestion.

5.1TROUBLESHOOTING IP OVER ATM

You have configured an IP over ATM VLAN, but 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 and from the SmartSwitch 9A100 (using start ping) to its end nodes. If you cannot ping, check physical connectivity (disconnected cable and so on).

2.Check IP routes and addresses.

•Use the show route command to check the SmartSwitch 9A100 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 (ARP server is on SmartSwitch 9A100) to check the local 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 node configurations.

-Are end nodes configured correctly?

3.Check ARP statistics.

•Use show ipatmarp (if the ARP server is on the SmartSwitch 9A100).

-Are there entries in the table?

-Are the ATM addresses correct?

•Use show clientarp (ARP server is not on SmartSwitch 9A100) to check local client’s ARP Table.

-Are there entries in the table? If not, recheck client and end node configuration.

-Are the ATM addresses correct?

SmartSwitch 9A100 User Guide 5-1

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Contents SmartSwitch 9A100 User Guide SmartSwitch 9A100 User Guide FCC Class a Notice Declaration of Conformity Addendum Safety Information Class 1 Laser Transceivers Fiber Optic Protective Caps Regulatory Compliance Summary Safety Revision History Table of Contents Specifications Acronyms Index Xii SmartSwitch 9A100 User Guide List of Figures List of Figures Xiv SmartSwitch 9A100 User Guide List of Tables List of Tables Xvi SmartSwitch 9A100 User Guide Introduction Introduction SmartSwitch 9A100 User Guide Switch Installation and Setup Unpacking the SwitchCheck Accessory Carton Contents SmartSwitch 9A100-04 front panel Inspecting the Switch1 DS3 and E3 I/O Module Configuration Installing the Switch Installing the SmartSwitch 9A100 Configuring the Switch SmartSwitch 9A100 console and network connections Console Commands Using the ConsoleSmartSwitch # show portconfig a1 Traffic SmartSwitch # set consoletimeoutConsole Time-out Creating an AliasSwitchTrafficCongestion. For example Ambiguous CommandsExterior Smartswitch ATM AdministratorSmartSwitch # ? add laneclient Console HelpSmartSwitch ATM Administrator MB RAM Installation StepsStarting SmartSwitch ATM Administrator the First Time Accessing Online HelpUser Name Access Level Default Password SmartSwitch ATM Administrator SmartSwitch # add ipatmclient IP Over ATM and LaneCreating AN IP Over ATM Vlan Server Is local Server Connection Established Creating AN Emulated LAN ATM Addressing for IP over ATM3900000000000000000014418000005A01010100 No Lane server address is specified see note below Add ElanIlmi ATM Addressing for LAN Emulation ELANs Across Multiple SwitchesSwitch Clients SmartSwitch# add laneclientElan1 Page Switch Administration Backing UP and Restoring Switch ConfigurationPath /backdir/config-1 Creating an Iisp Route SmartSwitch# restore switchSmartSwitch # show netprefix b2 ATM RoutingAtmroute AtmAddressIisp route across Pnni domain UNI Routes Route Metrics IP Routing SmartSwitch # show pnnimetricsRoute NET Table 90.1.1.254Event Categories Events and AlarmsSmartSwitch # set eventdisplay Viewing Events and AlarmsDeleting Events and Alarms SmartSwitch # set alarmdisplayPVC Connections 100 SmartSwitch # add trafficdescriptorSmartSwitch # show trafficdescriptor Point-to-Point PVCsMd1 #add trafficdescriptor Point-to-Multipoint PVCsConnecting to Local Switch Client Through a PVC Local10.1.1.0 VCC Mask Index VPI Bits VPI Values VCI Bits VCI Values Non-zero VPIsSmartSwitch # set portconfig a1 Use show portconfig to see the change to port A1Traffic Descriptors Traffic ManagementTraffic Descriptor with CLP and best effort Type Number Descriptor CharacteristicsCall Admission Control Policy 80005000 Ubr Min for CBR queue SmartSwitch # set porttrafficcongestionQoS Queue Recommended Settings SmartSwitch # show switchtrafficcongestionEFCI, EPD, and RM Thresholds Upgrading and Changing Software Accessing the Boot Load PromptCommand Action Parameters Boot Load CommandsUpgrading Boot Load Software Boot PromFlash RAM =df b Upgrading Post Diagnostic Software =chpi=df p =df s Upgrading Switch Operating SoftwareUsing the Update Firmware Command SmartSwitch # update firmware214.95.77.240 Saving Core Dumps Bobr Tftpboot/bobr/coreSet CoreDump command 204.95.77.240Error IP e0103288 PFP e04be080 R0pfp e04be040 R1sp e04be0c0 Troubleshooting IP Over ATM TroubleshootingTroubleshooting LAN Emulation Troubleshooting Pnni Links Troubleshooting Congestion Diagnosing CongestionGlobal Congestion Port Congestion Troubleshooting Congestion Function Appendix a SpecificationsFigure A-1 SmartSwitch 9A100 front panel ¢ %+2,%/˜96%,,%,329 Specification ValueProtocol Standard Table A-4 ATM port specificationsRJ-45 Pin RJ-45 Color DB-9 Pin DB-9 Description Management Protocol Supported MIBsTechnical Specifications MIB, SMI, MIB Files and Internet MIB Hierarchy Appendix B Agent SupportMIB, SMI, MIB Files and Internet MIB Hierarchy ZeitNet Cabletron Proprietary MIBsRelation Between Object Identifier and the Represented Value Supported SMI Formats Supported protocolsName Object Identifier Function Zeitnet Cabletron Proprietary MIB GroupsMIB Exceptions SmartSwitch 9A100 MIB SupportManaging the SmartSwitch 9A100 Update firmware Backup Restore Reboot Console Commands that Affect the AgentTelephone Assistance FAX ServiceElectronic Services Appendix C Technical SupportHardware Warranty Software WarrantyRepair Services Appendix D Acronyms Bootp DTE FCS Ilmi LES Netbeui PDU RMA SVC VBR/RT Acronyms SmartSwitch 9A100 User Guide Numerics IndexElan Lane Snmp Lane Pnni Non-zero values