nanog mailing list archives

Re: anyone else seeing very long AS paths?


From: Michael Ulitskiy <mulitskiy () acedsl com>
Date: Tue, 17 Feb 2009 11:07:12 -0500

My bgp speaking devices are a couple of 7200s running 12.2(40). 
Not the newest IOS out there, but it's been doing the job just fine up until yesterday.
Yesterday, when that malformed announcement hit my routers they didn't crash, 
but they did reset bgp sessions (even though I didn't accept the route) and they kept doing so 
until I got my upstream to filter it out.
According to cisco bug toolkit CSCdr54230 should be fixed in 12.2, so obviously it's not enough.
Does anybody know what IOS version has fix this problem, 'cause I couldn't find this info at CCO?
Thanks,

Michael

On Tuesday 17 February 2009 10:21:07 am Etaoin Shrdlu wrote:
Jared Mauch wrote:

On Tue, Feb 17, 2009 at 08:07:36AM +0200, Hank Nussbacher wrote:

"They" will keep trying and until a vast majority of ISPs implement 
maxas, this will keep happening.

    Or until people who are still running multi-year old cisco code
actually upgrade?  This seems to primarily impact:

    1) Old cisco code
    2) PC based bgp daemons

Both of which likely just need to be upgraded.  I actually suspect 
that a lot of people who dropped their bgp sessions did not notice
something happened, and still will not upgrade their code....I
suspect these people don't even know they have a bgp speaking device
anymore.

On the other hand, the fact that various entities have gone out of their 
way to advertise that they're running old hardware/out-of-date software 
has been noted elsewhere. I'd strongly suggest, if you're reading NANOG, 
  that you update, before someone less pleasant and friendly than myself 
finds you. Please.





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