Avaya Troubleshooting Routers Guide de dépannage télécharger pdf (Page 121)

Troubleshooting a Network Connection Problem

6-15

Troubleshooting Open Shortest Path First (OSPF)

Do the following to troubleshoot an OSPF routing problem:

1. 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

log -fftwid -eOSPF -s

<slot_no.>

Example

If you are ﬁltering events from Slots 3 and 4, you enter

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 reveals whether OSPF is created (1) or deleted

(not 1).

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

3. Check the OSPF neighbor states to determine 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, or loading) are interim or transition states. Investigate any

routers or links that do not recover from these states.

4. Look at the link state data base (LSDB) of the router.

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

Note: In Version 8.01 and higher, you can restrict the amount of OSPF

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

troubleshoot a problem.

1 2 ... 116 117 118 119 120 121 122 123 124 125 126 ... 253 254

Pas de commentaire

Avaya Troubleshooting Routers Guide de dépannage Page 121