not necessary, it can appear in any place in the received AS-PATH.
regards
Song
在 2015/1/27 22:20, Carlos M. Martinez 写道:
Is 'local as' the same as the origin-as ? That is, the first item in the
AS-PATH list ?
regards
Carlos
On 1/27/15 12:16 PM, Song Li wrote:
For example, My AS# is 23910 and the 'local AS' is 23910. If our BGP
router received a route from the BGP neighbor AS1 with the AS-PATH: 1 .*
23910, then the route is what we are looking for.
在 2015/1/27 22:05, Carlos M. Martinez 写道:
Can you clarify what do you mean by 'local AS' ?
regards
Carlos
On 1/27/15 11:48 AM, Song Li wrote:
Hi everyone,
Recently I studied the BGP AS path looping problem, and found that in
most cases, the received BGP routes containing local AS# are suspicious.
However, we checked our BGP routing table (AS23910,CERNET2) on juniper
router(show route hidden terse aspath-regex .*23910.* ), and have not
found such routes in Adj-RIB-In.
We believe that the received BGP routes containing local AS# are related
to BGP security problem. Hence, we want to look for some real cases in
the wild. Could anybody give us some examples of such routes?
Thanks!
Best Regards!
--
Song Li
Room 4-204, FIT Building,
Network Security,
Department of Electronic Engineering,
Tsinghua University, Beijing 100084, China
Tel:( +86) 010-62446440
E-mail: [email protected]
