Cabletron Systems 6A000 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 SmartCell 6A000 (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 SmartCell 6A000 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 SmartCell 6A000) 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 SmartCell 6A000).

-Are there entries in the table?

-Are the ATM addresses correct?

Use show clientarp (ARP server is not on SmartCell 6A000) 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?

4.Check ILMI, UNI routes, and PVCs (if applicable).

If using SVCs, use show ATMRoute to check whether static UNI routes are correct and whether dynamic UNI routes are established and correct. If dynamic routes are incorrect or missing, try creating static routes instead.

If using PVCs, use show pvc to check if PVCs connect the correct resources through the correct ports.

If using PVCs, use show ipatmpvc to check if local switch clients are mapped to the correct end node IP addresses.

SmartCell 6A000 User Guide 5-1

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Contents SmartCell 6A000 User Guide Ii SmartCell 6A000 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 SmartCell 6A000 User Guide List of Figures List of Figures Xiv SmartCell 6A000 User Guide List of Tables List of Tables Xvi SmartCell 6A000 User Guide Introduction Introduction SmartCell 6A000 User Guide Check Accessory Carton Contents Switch Installation and SetupUnpacking the Switch Inspecting the Switch6A-IOM-29-4-IR Face Plate Number Physical Specification 6A-IOM-21-46A-IOM-22-4 6A-IOM-29-41 DS3 and E3 I/O Module Configuration Installing the SwitchInstalling the Switch Switch Installation and Setup Configuring the SwitchConfiguring the Switch 6A000 console and network connections Console Commands Using the ConsoleSmartCell ZX # show portconfig a1 Creating an Alias Console Time-outConsole Help Ambiguous CommandsSmartswitch ATM Administrator SmartCell ZX # ? add laneclientExterior MB RAM Installation StepsUser Name Access Level Default Password Starting SmartSwitch ATM Administrator the First TimeAccessing Online Help SmartSwitch ATM Administrator Creating AN IP Over ATM Vlan IP Over ATM and LaneServer Is local Server Connection Established ATM Addressing for IP over ATM Creating AN Emulated LANNo Lane server address is specified see note below Ilmi ELANs Across Multiple Switches Switch ClientsATM Addressing for LAN Emulation Elan1 ›amV˜m˜h¤d›F=˜/2 ˜˜,6˜3F˜1˜m=˜/2 SmartCell 6A000 User Guide Switch Administration Backing UP and Restoring Switch ConfigurationPath /backdir/config-1 ATM Routing Creating an Iisp RouteSmartCell ZX # show netprefix b2 AtmAddress Iisp Routing ConsiderationsIisp route across Pnni domain UNI Routes 750 Route MetricsCbr 200# show Pnnimetrics IP RoutingRoute NET ZX # show routeEvent Categories Events and AlarmsSmartCell ZX # set eventdisplay Viewing Events and AlarmsDeleting Events and Alarms SmartCell ZX # set alarmdisplayPVC Connections 100 Point-to-Point PVCsPoint-to-Multipoint PVCs SmartCell ZX # show trafficdescriptorMd1 #add trafficdescriptor 10.1.1.0 Connecting to Local Switch Client Through a PVCNon-zero VPIs LocalZX # set vccmask VCC Mask Index VPI Bits VPI Values VCI Bits VCI ValuesSmartCell ZX # set portconfig a1 Use show portconfig to see the change to port A1Traffic Descriptors Traffic ManagementSmartCell ZX# show trafficdescriptor Type Number Descriptor CharacteristicsZX# add pvc Call Admission Control Policy8000 5000Ubr Min for CBR queue QoS Queue Recommended Settings SmartCell ZX # 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 Software214.95.77.240 Using the Update Firmware CommandSaving 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 Congestion Troubleshooting Pnni LinksGlobal Congestion Diagnosing CongestionPort Congestion Troubleshooting Congestion Function Appendix a SpecificationsEjector Specification ValueTable A-3 Physical Specifications UNI Protocol StandardRJ-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 Name Object Identifier Function Supported protocolsSupported SMI Formats Zeitnet Cabletron Proprietary MIB GroupsSmartCell 6A000 MIB Support Non-Conformance MIB ExceptionsConsole Commands that Affect the Agent Update firmware Backup Restore RebootManaging the Smartcell 6A000 Managing the SmartCell 6A000 Telephone Assistance FAX ServiceElectronic Services Appendix C Technical SupportHardware Warranty Software WarrantyRepair Services Isdn Appendix D AcronymsBootp DTE FCS Ilmi LES Netbeui PDU RMA SVC VBR/RT Acronyms Appendix D-12 SmartCell 6A000 User Guide Numerics IndexElan Lane Snmp Lane VPI