[Sigh. Again with the right source email address.]
On May 29, 2012, at 2:24 PM, John G. Scudder wrote:
>> Philosophically, the thing that makes me worry the most is that we're cutting out one of BGP's fundamental elements and replacing it with one which provides only a subset of its semantics. Specific things missing include:
>> - Confederations. But we are discussing ways to fix this.
>> - Extensibility to include new segment types. In principle this is a fairly serious omission, but one can argue that new segment types can't be introduced in practice, since existing implementations will treat them as fatal errors.
- AS_SETs. SIDR has decided not to support these, and IDR has published RFC 6472 / BCP 172 "Recommendation for Not Using AS_SET and AS_CONFED_SET in BGP". Nonetheless, they remain part of the protocol and have not (yet) been formally deprecated, so I mention them for completeness.