AS path question.

Greg Whynott Greg.Whynott at oicr.on.ca
Wed Nov 10 14:22:20 CST 2010


Recently I adjusted the maxas-limit option on our router,    logs started reporting routes being refused because the AS path is to long.   seems to work as expected.

when I looked at the logs I was a bit confused at what i was looking at...   why is it there are multiple AS's in the path that appear to be the same AS?  I expected an AS path comprised of mostly unique ASs.

instead of this:

476330: Nov 10 14:55:07.247 EDT: %BGP-6-ASPATH: Long AS path 549 26677 6939 21011 43022 43022 43022 43022 43022 47359 47359 47359 47359 47359 47359 47359 47359 received from isp router: More than configured MAXAS-LIMIT



i expected it would look more like:

476330: Nov 10 14:55:07.247 EDT: %BGP-6-ASPATH: Long AS path 549 26677 6939 21011 43022  47359 received from … .. .




thanks for your time again,
greg






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