Re: [CCIE R&S] Peer in wrong AS at BB2 router | Will proctor

From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sun Jul 20 2008 - 18:00:03 ART

On the line of the log that says "(peer in wrong AS)" the field after
that "2 bytes 000A" is the ASN in hex. This means that they are in
0x000A (hex), which is 10 decimal.

HTH,

Brian McGahan, CCIE #8593 (R&S/SP/Security)
bmcgahan@internetworkexpert.com <mailto:bmcgahan@internetworkexpert.com>
 
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Vinod Lodhi 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
>
> ____________________________________________________________________________
> _____
>
> R5#debug ip bgp
>
> 6d08h: BGP: 172.16.255.6 open active, delay 28272ms
>
> 6d08h: BGP: 172.16.255.6 open active, local address 172.16.255.5
>
> 6d08h: BGP: 172.16.255.6 sending OPEN, version 4
>
> 6d08h: BGP: 172.16.255.6 OPEN rcvd, version 4
>
> 6d08h: BGP: 172.16.255.6 bad OPEN, remote AS is 10, expected 30
>
> 6d08h: BGP: 172.16.255.6 sending NOTIFICATION 2/2 (peer in wrong AS) 2 bytes
> 000A
>
> 6d08h: BGP: 172.16.255.6 remote close, state CLOSEWAIT
>
> 6d08h: BGP: 172.16.255.6 closing
>
> ___________________________________________________________________________
>
>  
>
> Thanks!!
>
>
> _______________________________________________________________________
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