Link state advertisements

Brocade devices support the following types of LSAs, which are described in RFC 2328 and 3101:

  • Router link
  • Network link
  • Summary link
  • Autonomous system summary link
  • AS external link
  • Not-So-Stubby Area (NSSA) external link
  • Grace LSAs

Communication among areas is provided by means of link state advertisements (LSAs). The LSAs supported for each area type are as follows:

  • Backbone (area 0) supports LSAs 1, 2, 3, 4, 5, and 7.
  • Nonbackbone area supports LSAs 1, 2, 3, 4, and 5.
  • Stub area supports LSAs 1, 2, and 3.
  • Totally stubby area (TSA) supports LSAs 1 and 2, and also supports a single LSA 3 per ABR, advertising a default route.
  • No so stubby area (NSSA) supports LSAs 1, 2, 3, and 7.
Parent topic: OSPFv2