look for BGP routes containing local AS#

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!
>>>
> 
>