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Configure OSPF-Specific Options

Purpose

When unexpected events or problems occur, or if you want to diagnose OSPF neighbor establishment issues, you can view more detailed information by configuring options specific to OSPF.

To configure OSPF options, follow these steps:

  1. Diagnose OSPF Session Establishment Problems
  2. Analyze OSPF Link-State Advertisement Packets in Detail

Diagnose OSPF Session Establishment Problems

Action

To trace OSPF messages in detail, follow these steps:

  1. In configuration mode, go to the following hierarchy level:
    [edit]user@host# edit protocols ospf traceoptions
  2. Configure OSPF hello messages:
    [edit protocols ospf traceoptions]user@host# set flag hello detail
  3. Verify the configuration:
    user@host# show

    For example:

    [edit protocols ospf traceoptions]
    user@host# show
    file ospf size 5m world-readable;
    flag hello detail;
  4. Commit the configuration:
    user@host# commit
  5. View the contents of the file containing the detailed messages:
    user@host# run show log filename

    For example:

    user@host# run show log ospf
    Dec 2 16:14:24 Version 2, length 44, ID 10.0.0.6, area 1.0.0.0
    Dec 2 16:14:24 checksum 0xf01a, authtype 0
    Dec 2 16:14:24 mask 0.0.0.0, hello_ivl 10, opts 0x2, prio 128
    Dec 2 16:14:24 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0
    Dec 2 16:14:24 OSPF sent Hello (1) -> 224.0.0.5 (so-1/1/2.0)
    Dec 2 16:14:24 Version 2, length 44, ID 10.0.0.6, area 1.0.0.0
    Dec 2 16:14:24 checksum 0xf01a, authtype 0
    Dec 2 16:14:24 mask 0.0.0.0, hello_ivl 10, opts 0x2, prio 128
    Dec 2 16:14:24 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0
    Dec 2 16:14:26 OSPF rcvd Hello 10.10.10.33 -> 224.0.0.5 (so-1/1/1.0)
    Dec 2 16:14:26 Version 2, length 48, ID 10.10.134.12, area 0.0.0.0
    Dec 2 16:14:26 checksum 0x99b8, authtype 0Dec 2 16:14:26 mask 255.255.255.252, hello_ivl 10, opts 0x2, prio 1
    ec 2 16:14:26 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0
    Dec 2 16:14:29 OSPF rcvd Hello 10.10.10.29 -> 224.0.0.5 (so-1/1/0.0)
    Dec 2 16:14:29 Version 2, length 48, ID 10.108.134.11, area 0.0.0.0
    Dec 2 16:14:29 checksum 0x99b9, authtype 0Dec 2 16:14:29 mask 255.255.255.252, hello_ivl 10, opts 0x2, prio 1
    Dec 2 16:14:29 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0

Meaning

Table 1 lists OSPF tracing flags and presents example output for some of the flags.

Table 1: OSPF Protocol Tracing Flags

Tracing Flags

Description

Example Output

database-descripttion

All database description packets

Dec 2 15:44:51 RPD_OSPF_NBRDOWN: OSPF neighbor 10.10.10.29 (so-1/1/0.0) state changed from Full to Down
Dec 2 15:44:51 RPD_OSPF_NBRDOWN: OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Full to Down
Dec 2 15:44:55 RPD_OSPF_NBRUP: OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Init to ExStart
Dec 2 15:44:55 OSPF sent DbD (2) -> 224.0.0.5 (so-1/1/1.0)
Dec 2 15:44:55 Version 2, length 32, ID 10.0.0.6, area 0.0.0.0
Dec 2 15:44:55 checksum 0xf76b, authtype 0
Dec 2 15:44:55 options 0x42, i 1, m 1, ms 1, seq 0xa009eee, mtu 4470
Dec 2 15:44:55 OSPF rcvd DbD 10.10.10.33 -> 224.0.0.5 (so-1/1/1.0)
Dec 2 15:44:55 Version 2, length 32, ID 10.10.134.12, area 0.0.0.0
Dec 2 15:44:55 checksum 0x312c, authtype 0
Dec 2 15:44:55 options 0x42, i 1, m 1, ms 1, seq 0x2154, mtu 4470

error

OSPF errored packets

Dec 2 15:49:34 OSPF packet ignored: no matching interface from 172.16.120.29
Dec 2 15:49:44 OSPF packet ignored: no matching interface from 172.16.120.29
Dec 2 15:49:54 OSPF packet ignored: no matching interface from 172.16.120.29
Dec 2 15:50:04 OSPF packet ignored: no matching interface from 172.16.120.29
Dec 2 15:50:14 OSPF packet ignored: no matching interface from 172.16.120.29

event

OSPF state transitions

Dec 2 15:52:35 OSPF interface ge-2/2/0.0 state changed from DR to DR
Dec 2 15:52:35 OSPF interface ge-3/1/0.0 state changed from DR to DR
Dec 2 15:52:35 OSPF interface ge-3/2/0.0 state changed from DR to DR
Dec 2 15:52:35 OSPF interface ge-4/2/0.0 state changed from DR to DR
Dec 2 15:53:21 OSPF neighbor 10.10.10.29 (so-1/1/0.0) state changed from Full to Down
Dec 2 15:53:21 RPD_OSPF_NBRDOWN: OSPF neighbor 10.10.10.29 (so-1/1/0.0) state changed from Full to Down
Dec 2 15:53:21 OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Full to Down
Dec 2 15:53:21 RPD_OSPF_NBRDOWN: OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Full to Down
Dec 2 15:53:25 OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Down to Init
Dec 2 15:53:25 OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Init to ExStart
Dec 2 15:53:25 RPD_OSPF_NBRUP: OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Init to ExStart
Dec 2 15:53:25 OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from ExStart to Exchange
Dec 2 15:53:25 OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Exchange to Full
Dec 2 15:53:25 RPD_OSPF_NBRUP: OSPF neighbor 10.10.10.33 (so-1/1/1.0) state changed from Exchange to Full

flooding

Link-state flooding packets

Dec 2 15:55:21 OSPF LSA Summary 10.218.0.0 10.0.0.6 flooding on so-1/1/0.0
Dec 2 15:55:21 OSPF LSA Summary 10.218.0.0 10.0.0.6 flooding on so-1/1/1.0
Dec 2 15:55:21 OSPF LSA Summary 10.218.0.0 10.0.0.6 on no so-1/1/2.0 rexmit lists, no flood
Dec 2 15:55:21 OSPF LSA Summary 10.218.0.0 10.0.0.6 on no so-1/1/3.0 rexmit lists, no flood

Dec 2 15:55:21 OSPF LSA Summary 10.245.0.1 10.0.0.6 on no so-1/1/2.0 rexmit lists, no flood
Dec 2 15:55:21 OSPF LSA Summary 10.245.0.1 10.0.0.6 on no so-1/1/3.0 rexmit lists, no flood

hello

Hello packets

Dec 2 15:57:25 OSPF sent Hello (1) -> 224.0.0.5 (ge-3/1/0.0)
Dec 2 15:57:25 Version 2, length 44, ID 10.0.0.6, area 2.0.0.0
Dec 2 15:57:25 checksum 0xe43f, authtype 0
Dec 2 15:57:25 mask 255.255.0.0, hello_ivl 10, opts 0x2, prio 128
Dec 2 15:57:25 dead_ivl 40, DR 10.218.0.1, BDR 0.0.0.0
Dec 2 15:57:25 OSPF rcvd Hello 10.10.10.33 -> 224.0.0.5 (so-1/1/1.0)
Dec 2 15:57:25 Version 2, length 48, ID 10.10.134.12, area 0.0.0.0
Dec 2 15:57:25 checksum 0x99b8, authtype 0
Dec 2 15:57:25 mask 255.255.255.252, hello_ivl 10, opts 0x2, prio 1
Dec 2 15:57:25 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0
Dec 2 15:57:27 OSPF sent Hello (1) -> 224.0.0.5 (ge-3/2/0.0)
Dec 2 15:57:27 Version 2, length 44, ID 10.0.0.6, area 2.0.0.0
Dec 2 15:57:27 checksum 0xe4a5, authtype 0
Dec 2 15:57:27 mask 255.255.0.0, hello_ivl 10, opts 0x2, prio 128
Dec 2 15:57:27 dead_ivl 40, DR 10.116.0.1, BDR 0.0.0.0
Dec 2 15:57:28 OSPF rcvd Hello 10.10.10.29 -> 224.0.0.5 (so-1/1/0.0)
Dec 2 15:57:28 Version 2, length 48, ID 10.10.134.11, area 0.0.0.0
Dec 2 15:57:28 checksum 0x99b9, authtype 0
Dec 2 15:57:28 mask 255.255.255.252, hello_ivl 10, opts 0x2, prio 1
Dec 2 15:57:28 dead_ivl 40, DR 0.0.0.0, BDR 0.0.0.0

lsa-ack

Link-state acknowledgment packets

Dec 2 16:00:11 OSPF rcvd LSAck 10.10.10.29 -> 224.0.0.5 (so-1/1/0.0)
Dec 2 16:00:11 Version 2, length 44, ID 10.10.134.11, area 0.0.0.0
Dec 2 16:00:11 checksum 0xcdbf, authtype 0
Dec 2 16:00:11 OSPF rcvd LSAck 10.10.10.33 -> 224.0.0.5 (so-1/1/1.0)
Dec 2 16:00:11 Version 2, length 144, ID 10.10.134.12, area 0.0.0.0
Dec 2 16:00:11 checksum 0x73bc, authtype 0
Dec 2 16:00:16 OSPF rcvd LSAck 10.10.10.33 -> 224.0.0.5 (so-1/1/1.0)
Dec 2 16:00:16 Version 2, length 44, ID 10.10.134.12, area 0.0.0.0
Dec 2 16:00:16 checksum 0x8180, authtype 0

lsa-request

Link-state request packets

Dec 2 16:01:38 OSPF rcvd LSReq 10.10.10.29 -> 224.0.0.5 (so-1/1/0.0)
Dec 2 16:01:38 Version 2, length 108, ID 10.10.134.11, area 0.0.0.0
Dec 2 16:01:38 checksum 0xe86, authtype 0

lsa-update

Link-state update packets

Dec 2 16:09:12 OSPF built router LSA, area 0.0.0.0
Dec 2 16:09:12 OSPF built router LSA, area 1.0.0.0
Dec 2 16:09:12 OSPF built router LSA, area 2.0.0.0
Dec 2 16:09:13 OSPF sent LSUpdate (4) -> 224.0.0.5 (so-1/1/0.0)
Dec 2 16:09:13 Version 2, length 268, ID 10.0.0.6, area 0.0.0.0
Dec 2 16:09:13 checksum 0x8047, authtype 0
Dec 2 16:09:13 adv count 7
Dec 2 16:09:13 OSPF sent LSUpdate (4) -> 224.0.0.5 (so-1/1/1.0)
Dec 2 16:09:13 Version 2, length 268, ID 10.0.0.6, area 0.0.0.0
Dec 2 16:09:13 checksum 0x8047, authtype 0
Dec 2 16:09:13 adv count 7

packets

All OSPF packets

Not available.

packet-dump

Dump the contents of selected packet types

Not available.

spf

SPF calculations

Dec 2 16:08:03 OSPF full SPF refresh scheduled
Dec 2 16:08:04 OSPF SPF start, area 1.0.0.0
Dec 2 16:08:04 OSPF add LSA Router 10.0.0.6 distance 0 to SPF list
Dec 2 16:08:04 SPF elapsed time 0.000525s
Dec 2 16:08:04 Stub elapsed time 0.000263s
Dec 2 16:08:04 OSPF SPF start, area 2.0.0.0
Dec 2 16:08:04 OSPF add LSA Router 10.0.0.6 distance 0 to SPF list
Dec 2 16:08:04 SPF elapsed time 0.000253s
Dec 2 16:08:04 Stub elapsed time 0.000249s
Dec 2 16:08:04 OSPF SPF start, area 0.0.0.0
Dec 2 16:08:04 OSPF add LSA Router 10.0.0.6 distance 0 to SPF list
Dec 2 16:08:04 OSPF add LSA Router 10.10.134.11 distance 1 to SPF list
Dec 2 16:08:04 IP nexthop so-1/1/0.0 0.0.0.0
Dec 2 16:08:04 OSPF add LSA Router 10.10.134.12 distance 1 to SPF list
Dec 2 16:08:04 IP nexthop so-1/1/1.0 0.0.0.0


Analyze OSPF Link-State Advertisement Packets in Detail

Action

To analyze OSPF link-state advertisement packets in detail, follow these steps:

  1. In configuration mode, go to the following hierarchy level:
    [edit]user@host# edit protocols ospf traceoptions
  2. Configure OSPF link-state packages:
    [edit protocols ospf traceoptions]user@host# set flag lsa-update detail
  3. Verify the configuration:
    user@host# show

    For example:

    [edit protocols ospf traceoptions]
    user@host# show
    file ospf size 5m world-readable;
    flag hello detail;
    flag lsa-update detail;
  4. Commit the configuration:
    user@host# commit
  5. View the contents of the file containing the detailed messages:
    user@host# run show log filename

    For example:

    user@host# run show log ospf
    Dec 2 16:23:47 OSPF sent LSUpdate (4) -> 224.0.0.5 (so-1/1/0.0) ec 2 16:23:47 Version 2, length 196, ID 10.0.0.6, area 0.0.0.0
    Dec 2 16:23:47 checksum 0xcc46, authtype 0
    Dec 2 16:23:47 adv count 6 Dec 2 16:23:47 OSPF sent LSUpdate (4) -> 224.0.0.5 (so-1/1/1.0)
    Dec 2 16:23:47 Version 2, length 196, ID 10.0.0.6, area 0.0.0.0 Dec 2 16:23:47 checksum 0xcc46, authtype 0
    Dec 2 16:23:47 adv count 6

Published: 2012-12-10

Published: 2012-12-10

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