From: Antonio Soares (amsoares@netcabo.pt)
Date: Tue Mar 20 2007 - 10:43:27 ART
Whenever you have a misconfiguration, your local router will send a BGP
notification to the other peer like this:
%BGP-3-NOTIFICATION: sent to neighbor 54.1.1.254 2/2 (peer in wrong AS) 2
bytes 0036 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 002D 0104 0036 00B4 D412
0301 1002 0601 0400 0100 0102 0280 0002 0202 00
Here 0x0036 means BGP AS54. So the local router is saying to its peer that
it's in the wrong AS=54. This way is know the remote AS.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
iyux2000@gmail.com
Sent: segunda-feira, 19 de Margo de 2007 23:17
To: ccielab@groupstudy.com
Subject: Debug BGP Question
Good morning, GS
I have a question regarding to the real lab exam, i'am sure that it
awlays ask you configure "local-as" command due to the neighbor configured
with the wrong as. But if the question didn't tell you the wrong AS number
that is configured on the other side (e.g. on BB1). Is there possible a way
to find the wrong-AS-number from the BGP debug command? I tried serveral
debug commands, but i can not figure it out.
Thank you for your reply.
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:52 ART