From: Vinod Lodhi (vinodlodhi@airtelmail.in)
Date: Sun Jul 20 2008 - 12:00:50 ART
Hi, Thanks for the reply.
In my scenario the expected AS is 30, but that is derived from the debug at
neighbor router not the local router. Consider if that router is BB then how
will we get to know about the expected AS, as we don't have access to BB
routers.
Appreciate any inputs.
Thanks in advance..
Vinod
From: Ahmed Elhoussiny [mailto:aelhoussiny@gmail.com]
Sent: Sunday, July 20, 2008 7:29 PM
To: Vinod Lodhi
Subject: Re: Peer in wrong AS at BB2 router | Will proctor tell us the right
AS or will provide the access to BB router?
Hi ,
You dont get access the BB routers , for this you may use Local AS cmd
( nei BB local-as xx )
If they didn advise the BB AS i think the debugs will show you the
correct AS ..which is 10 in your example..
Kindly correct me guys if im wrong as im not sure from my 2nd statment.
B.regards
Ahmed.elhoussiny
CCNP-CCDP-CCIP-CCAI
Cisco IOS security Specialist
Cisco Design Specialist
On 7/20/08, Vinod Lodhi <vinodlodhi@airtelmail.in> wrote:
Hi:
How to attempt the question if the BB (Backbone router) is configured in
wrong AS for neighbor. Will we get the access to BB routers in LAB exam or
proctor will tell us the configured AS for that neighbor.
This question I got from the Jeff Doyle book, I was wondering if this
happened with BB router, how will we get the right information as we don't
have access.
Question details:
===================================================
2: Example 3-167 shows debug output from routers R1 and R5 in Figure 3-37.
What problem do the messages indicate?
Example 3-167 debug Output from R1 and R5 in Figure 3-37
R1#debug ip bgp
BGP debugging is on
R1#
BGP: 172.16.255.5 open active, local address 172.16.255.6
BGP: 172.16.255.5 sending OPEN, version 4
BGP: 172.16.255.5 received NOTIFICATION 2/2 (peer in wrong AS) 2 bytes 000A
BGP: 172.16.255.5 closing
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