Viewing OSPF external link-state information

Syntax:

show ip ospf external-link-state

When you enter this command, an output similar to the following is displayed:

Output for the show ip ospf external-link-state command

switch# show ip ospf external-link-state

 OSPF External LSAs

  Link State ID   Router ID       Age  Sequence #  Checksum
  --------------- --------------- ---- ----------- ----------
  10.3.7.0        10.0.8.37       232  0x80000005  0x0000d99f
  10.3.8.0        10.0.8.37       232  0x80000005  0x0000cea9
  10.3.9.0        10.0.8.37       232  0x80000005  0x0000c3b3
  10.3.10.0       10.0.8.37       232  0x80000005  0x0000b8bd
  10.3.33.0       10.0.8.36      1098  0x800009cd  0x0000b9dd

The table below shows the information the OSPF external link state displays:

CLI display of OSPF external link state information
Field	Content
Link State ID	LSA ID for this LSA. Normally, the destination of the external route, but may have some "host" bits set.
Router ID	Router ID of the router that originated this external LSA.
Age	Current age (in seconds) of this LSA.
Sequence #	Sequence number of the current instance of this LSA.
Chksum(Hex)	LSA checksum value.

Syntax:

show ip ospf external-link-state [status][subset-options]

router-id ip-addr: Subset option to filter displayed external-link-state data to show LSAs with the specified router ID only. Can also be filtered by using the link-state-id or sequence-number options.
sequence-number integer: Subset option to filter displayed external-link-state data to show LSAs with the specified sequence number. Can also be filtered by using the link-state-id or router-id options.
link-state-id ip-addr: Subset option to filter displayed external-link-state data to show LSAs with the specified ID only. Can also be filtered by using the sequence-number or router-id options.

Syntax:

show ip ospf external-link-state [status]advertise

Displays the hexadecimal data in the specified LSA packet, the actual contents of the LSAs. Can also be filtered by using the link-state-id, router-id, or sequence-number options.

Output for show ip ospf external-link-state advertise

switch# show ip ospf external-link-state advertise

OSPF External LSAs
 Advertisements
 ------------------------------------------------------------------------
 000302050a0307000a00082580000005d99f0024ffffff008000000a0000000000000000
 000302050a0308000a00082580000005cea90024ffffff008000000a0000000000000000
 000302050a0309000a00082580000005c3b30024ffffff008000000a0000000000000000
 000302050a030a000a00082580000005b8bd0024ffffff008000000a0000000000000000
 000002050a0321000a000824800009cdb9dd0024ffffff00800000010000000000000000