What Are the Common LSA Types of OSPF? Why Is Type 6 LSA Unavailable?

Created Apr 18, 2017 08:34:52Latest reply Apr 18, 2017 17:14:14 755 2 0 0
What Are the Common LSA Types of OSPF? Why Is Type 6 LSA Unavailable?
  • x
  • convention:

user_2790689  Expert   Created Apr 18, 2017 12:01:28 Helpful(0) Helpful(0)

ding
  • x
  • convention:

Adamcolob     Created Apr 18, 2017 17:14:14 Helpful(0) Helpful(0)

Common link-state advertisement (LSA) types of OSPF are as follows:

Type 1 LSA: router LSA;
Type 2 LSA: network LSA;
Type 3 LSA: summary LSA;
Type 4 LSA: ASBR-summary LSA;
Type 5 LSA: AS-external-LSA;
The original OSPF packet coding is not Type Length Value (TLV)-based. For the extension of OSPF functions, only the LSA types of OSPF can be extended.

Type 6 LSAs are Group-Membership-LSAs used to identify multicast group membership in the Multicast Open Shortest Path First (MOSPF) protocol. Type 6 LSAs are not supported on the router.

Type 8 LSAs are External-Attributes-LSAs used to redistribute Border Gateway Protocol (BGP) routes into OSPF and reserve the BGP autonomous system (AS) path information. Type 8 LSAs are not supported on the router.

RFC 2370 defines an important LSA type, namely, Opaque LSA, which allows for TLV-like structures. OSPF applications, such as OSPF traffic engineering, are based on the Opaque LSA extension abilities:

Type 9 LSAs are Opaque LSAs that are advertised within the local link only;
Type 10 LSAs are Opaque LSAs that are advertised within the local area only;
Type 11 LSAs, similar to Type 5 LSAs, are Opaque LSAs that are advertised within the local AS.
  • x
  • convention:

Responses

Reply
You need to log in to reply to the post Login | Register

Notice:To ensure the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but not limited to politically sensitive content, content concerning pornography, gambling, drug abuse and trafficking, content that may disclose or infringe upon others' intellectual properties, including commercial secrets, trade marks, copyrights, and patents, and personal privacy. Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see“ Privacy Policy.”
If the attachment button is not available, update the Adobe Flash Player to the latest version!
Fast reply Scroll to top