anyone else seeing very long AS paths?

Jon Lewis jlewis at lewis.org
Mon Feb 16 12:00:39 CST 2009


Why do you say that?  I counted 78 instances of 47868 in this long 
as-path, and our maxas-limit settings did trigger and reject these.

On Mon, 16 Feb 2009, Leland E. Vandervort wrote:

>
> bgp maxas-limit has a default value of 75 if you don't include it
> explicitly in the config so in this case it wouldn't have made much of a
> difference.
>
> L.
>
>
> On Mon, 16 Feb 2009, Jon Lewis wrote:
>
>> On Mon, 16 Feb 2009, John van Oppen wrote:
>>
>>> Yep we saw the same, every customer with old IOS had their sessions die
>>> to us at the same time...   That always makes for an interesting time
>>> when watching the NMS system...
>>
>> Is there a reason you don't use something like "bgp maxas-limit NN" on
>> your transit sessions?
>>
>> We saw this too, but it stopped at our transit routers.  There was
>> actually another a few days ago.
>>
>> Feb 13 18:46:07: %BGP-6-ASPATH: Long AS path 4323 1299 12887 12741 39412
>> 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625
>> 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625 39625
>> 39625 39625 39625 39625...
>>
>> Feb 16 11:24:53: %BGP-6-ASPATH: Long AS path 4323 3257 29113 47868 47868
>> 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868
>> 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868 47868
>> 47868 47868 47868 47868...
>>
>>
>> ----------------------------------------------------------------------
>>   Jon Lewis                   |  I route
>>   Senior Network Engineer     |  therefore you are
>>   Atlantic Net                |
>> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
>>
>

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________




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