Avaya Troubleshooting Routers Průvodce řešením problémů stáhnout pdf (Strana 125)

Troubleshooting a Network Layer Problem

308656-14.00 Rev 00

6-15

Troubleshooting OSPF

To troubleshoot an OSPF routing problem, do the following:

Use the Events Manager or the Technician Interface to filter the log to

display messages of all severity levels for OSPF running on the slots in

question.

The Technician Interface command is as follows:

log -fftwid -eOSPF -s

<slot_no.>

Example

If you are filtering events from slots 3 and 4, enter the following command:

log -fftwid -eOSPF -s3 -s4

Enter the following command to check the base records:

get wfOspfBase.*.0

The most important attributes are as follows:

• The State attribute shows whether OSPF is up (1), down (2), initializing

(3), or not present (4). You cannot change this setting.

• The Create attribute shows whether OSPF is created (1) or deleted

(a number other than 1).

• The Enable attribute shows whether OSPF is enabled (1) or disabled (2).

Check the OSPF neighbor states to compare the exchange state with

other OSPF routers on the network.

Neighbor states should be either two-way or full; the other states (init,

exchange start, and loading) are interim (or transition) states. Investigate any

routers or links that do not recover from these states.

Look at the link state database (LSDB) of the router.

This is the information from which the router builds its routing table.

Enter the following command to display the IP forwarding table:

get wfIpBaseRtEntry.7.*

Note:

In Versions 8.01 and later, you can restrict the amount of OSPF

information that appears in a log. Remove these filters when trying to

troubleshoot a problem.

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Avaya Troubleshooting Routers Průvodce řešením problémů Strana 125