Which of the following commands will display information about Type 4 LSAs? mn

Last Updated on July 31, 2021 by Admin 1

Which of the following commands will display information about Type 4 LSAs?

  • show ip ospf database external
  • show ip ospf database asbr-summary
  • show ip ospf database summary
  • show ip ospf database router
Explanation:
The command show ip ospf database asbr-summary will display information about Type 4 LSAs. These LSAs provide next-hop information for areas that are receiving Type 5 or external LSAs. Consider the following sample output of the show ip ospf database asbr-summary command:

300-410 Part 04 Q16 054
300-410 Part 04 Q16 054

The output shows that the router that sent this LSA is at 172.16.241.75. The router functioning as the ASBR is at 172.16.245.63. The advertising router, located at 172.16.241.75, is broadcasting that its best metric to reach the ASBR at 172.16.254.63 is 1.

The command show ip ospf database external will not display information about Type 4 LSAs. It will display information about Type 5 LSAs, or External Link LSAs, instead of ASBR summary links, which are Type 4 LSAs.

The command show ip ospf database summary will not display information about Type 4 LSAs. It will display information about summary links, or Type 3 LSAs, that are generated by an ABR, not summary links generated by an ASBR.

The command show ip ospf database router will not display information about Type 4 LSAs. It will display information about router links, or Type 1 LSAs, instead of ASBR summary links, which are Type 4 LSAs.

Objective:
Layer 3 Technologies
Sub-Objective:
Describe OSPF packet types

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