Appendix B. Changes from RFC 3065

The primary trigger for an update to RFC 3065 was regarding issues associated with AS path segment handling, in particular what to do when interacting with BGP peers external to a confederation and to ensure AS_CONFED_[SET|SEQUENCE] segment types are not propagated to peers outside of a confederation.

As such, the "Error Handling" section above was added and applies not only to BGP confederation speakers, but to all BGP speakers.

Other changes are mostly trivial and surrounding some clarification and consistency in terminology and denoting that AS_CONFED_[SET|SEQUENCE] Segment Type handling should be just as it is in the base BGP specification [BGP-4].