Take a watch on this route: show route 195.128.231.0/24 detail [..omitted..] AS path: AS2 PA[5]: 39792 35320 AS_TRANS AS_TRANS 35748 AS path: AS4 PA[4]: 35320 3.21 AS_TRANS 35748 AS path: Merged[5]: 39792 35320 3.21 AS_TRANS 35748 I [...omitted...] AS4_PATH contain AS_TRANS, it's also RFC violation, isn't it ? sthaug@nethelp.no пишет:
Anyone else seeing this: *> 91.196.186.0/24 62.237.167.25 0 3292 3549 15703 43531 23456 i
http://www.ietf.org/rfc/rfc4893.txt 6. Transition An OLD BGP speaker MUST NOT use AS_TRANS as its Autonomous System number.
Seeing it here too. On our 4-byte capable routers:
91.196.186.0/24 *[BGP/170] 1d 13:36:53, MED 0, localpref 105, from 193.75.0.204 AS path: 16150 15703 43531 AS_TRANS I AS path: 3356 6461 15703 43531 AS_TRANS I AS path: 1299 3549 15703 43531 AS_TRANS I
And on our non 4-byte capable routers it is simply shown as 23456. This ASN should not be used to originate prefixes, agreed.
Steinar Haug, Nethelp consulting, sthaug@nethelp.no
-- С уважением, Егор Зимин