From: Scott Morris (swm@emanon.com)
Date: Sat Sep 02 2006 - 21:54:49 ART
Guessing is always fun, but time consuming. :)
R2(config-router)#do sh ip bgp sum
BGP router identifier 150.7.2.2, local AS number 10
BGP table version is 2, main routing table version 2
1 network entries using 117 bytes of memory
1 path entries using 52 bytes of memory
2/1 BGP path/bestpath attribute entries using 248 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 417 total bytes of memory
BGP activity 1/0 prefixes, 1/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
100.100.100.1 4 400 0 0 0 0 0 never Active
R2(config-router)#
*Sep 3 00:37:13.610: %BGP-3-NOTIFICATION: received from neighbor
100.100.100.1 2/2 (peer in wrong AS) 2 bytes 000A
R2(config-router)#
So you'll get a notification that you are in the wrong AS immediately. but
it tells you what you are sending, not what the other side is expecting!
(0x000A = AS 10 which is what is configured locally, and all we know is the
peer is telling us it doesn't match)
So if you don't know what AS the peer is in, you can see it from these
messages... But what they expect YOU to be in is not exchanged. Even
"debug ip packet detail" doesn't give THAT much detail!
Perhaps a sniffer would, but AFAIK that hasn't been added into the lab!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPExpert VP - Curriculum Development
IPExpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
jnkmail4eva@yahoo.com
Sent: Saturday, September 02, 2006 8:20 PM
To: ccielab@groupstudy.com
Subject: Re: Re: RE: BGP question
unfortunately, guessing won't help in this situation ..
Any takers
This archive was generated by hypermail 2.1.4 : Sun Oct 01 2006 - 16:55:39 ART