Re: BGP Debug question (How to know what AS, neighbor is using

I wanted to follow up on this with the group. I think I misunderstood the
original question. So I think you are asking is there a way to know what the
incorrectly configured AS number is? There is no way I know of.

R2(config-router)#do sh run | s bgp
router bgp 2
 no synchronization
 bgp log-neighbor-changes
 neighbor 100.100.24.4 remote-as 99
 no auto-summary

router bgp 4
 no synchronization
 bgp log-neighbor-changes
 neighbor 100.100.24.2 remote-as 2
 no auto-summary

R2(config-router)#
*Jul 11 00:18:42.815: %BGP-3-NOTIFICATION: sent to neighbor 100.100.24.4 2/2
(peer in wrong AS) 2 bytes 0004 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 002D
0104 0004 00B4 6464 1804 1002 0601 0400 0100 0102 0280 0002 0202 00

R4(config-router)#
*Aug 10 09:31:46.319: %BGP-3-NOTIFICATION: received from neighbor
100.100.24.2 2/2 (peer in wrong AS) 2 bytes 0004

On Mon, Aug 10, 2009 at 2:57 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> It actually tells you exactly what you need there. 0x0021 is the AS
> number. Convert that to decimal and you are all set. So in this case,
> 0x0021 = AS 33
>
>
>
> On Mon, Aug 10, 2009 at 2:16 AM, Pradeep Malik <pradeepmlk_at_gmail.com>wrote:
>
>> Hi All,
>>
>> My question is; what debug cmds could we use to find out AS that neighbor
>> has configured for my peering i.e If I am X.X.X.X and this statement is
>> at neighbor " bgp X.X.X.X remote-as Y" How to know AS Y ? If I
>> troubleshoot on my router, it only gives below notification and it shows
>> hexa decimal value of AS configred at my side but not on neighbor side..
>>
>> *Dec 9 14:25:00.010: %BGP-3-NOTIFICATION: received from neighbor
>> 150.2.3.254 2/2 (peer in wrong AS) 2 bytes 0021
>>
>> any suggestions ???
>>
>> Cheerz,
>> PM
>>
>>
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>
>
> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
> Cell: +1.586.212.6107
> Fax: +1.810.454.0130
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-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
Blogs and organic groups at http://www.ccie.net