3.1.5 Message Processing Events and Sequencing Rules

The deviations from the Border Gateway Protocol 4 (BGP-4) specification [RFC4271] are:

  1. The RFC section on "Security Considerations" states that implementations MUST support TCP MD5 ([RFC2385]) for authentication. Authentication is not implemented.

  2. The RFC states, "As part of Phase 3 of the route selection process, the BGP speaker has updated its Adj-RIBs-Out. All newly installed routes and all newly unfeasible routes for which there is no replacement route SHALL be advertised to its peers by means of an UPDATE message." This is not implemented. An External Border Gateway Protocol (EBGP) or (eBGP) learned route will not be re-advertised to another eBGP peer even if that’s the best route from the decision process.