2 Dec
2011
2 Dec
'11
4:06 p.m.
On Fri, Dec 2, 2011 at 9:35 AM, Alexandre Snarskii <snar@snar.spb.ru> wrote:
This draft says that
...note it's a DRAFT, not a STANDARD...
If a BGP speaker receives a route which has an AS number of zero in the AS_PATH (or AS4_PATH) attribute, it SHOULD be logged and treated as a WITHDRAW. This same behavior applies to routes containing zero as the Aggregator or AS4 Aggregator.
but observed behaviour was more like following:
If a BGP speaker receives [bad route] it MUST close session immediately with NOTIFICATION Error Code 'Update Message Error' and subcode 'Error with optional attribute'.
hence this old behavor