[111903] in North American Network Operators' Group
RE: anyone else seeing very long AS paths?
daemon@ATHENA.MIT.EDU (Jon Lewis)
Mon Feb 16 13:00:49 2009
Date: Mon, 16 Feb 2009 13:00:39 -0500 (EST)
From: Jon Lewis <jlewis@lewis.org>
To: "Leland E. Vandervort" <leland@taranta.discpro.org>
In-Reply-To: <Pine.LNX.4.44.0902161751320.22705-100000@taranta.discpro.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
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_________
