From: Marko Milivojevic (markom@markom.info)
Date: Sun Jul 20 2008 - 16:46:57 ART
Yes -- read my previous post :-)
When you configure neighbor with any AS, you will receive the message
informing you of the remotely configured ASN.
In your example:
> BGP: 172.16.255.5 received NOTIFICATION 2/2 (peer in wrong AS) 2 bytes 000A
Look at the end. Hex number "000A" is remotely configured ASN. You
just change your configuration to peer with AS 10 and you're done.
Of course, in order for all this to happen, you need to configure BGP
first. As you correctly noticed, there is no way to know in advance,
so you need to think creatively if faced with this sort of question.
You know the sure way to find out the information you need -- active
BGP. Configure it using any remote as number you can think of. You
will receive information you need for proper configuration within
seconds.
In CCIE lab, this sort of question is used to test troubleshooting skills.
-- Marko CCIE #18427
This archive was generated by hypermail 2.1.4 : Mon Aug 04 2008 - 06:11:56 ART