* Andy Davidson: > OpenBGPd is therefore dropping the sessions when this update is > received. Unideal if this attribute is learned on multiple > upstreams... > > The impact today is fairly limited as there are relatively few bgp > speakers honouring the 4-byte ASN protocol extension rules, but as > code that support these features creeps around the internet, the next > time this happens the impact could be much greater, so we need to > understand which implementation of which BGP software caused this > illegal origination.
Uhm, shouldn't you just ignore invalid AS4_PATH attributes, instead of dropping the session? It's a transient, optional attribute, so you can't rely on your peers to filter it. -- Florian Weimer <[EMAIL PROTECTED]> BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99
