From: Doan Dung Chi (dungchid@gmail.com)
Date: Sun Jul 20 2008 - 16:32:17 ART
I also agree with Vinod because Local Router receive message
"%BGP-3-NOTIFICATION: received from neighbor" will never know which AS
Remote router need ?
I remember in IE workbook (when doing the LAB18 Task5.2, I also ask myself
if they don't provide AS how can I do), they have same scenario but IE
provide AS to complete the task.
Do anyone have any ideas to solve this problems ?
Thanks
----- Original Message -----
From: "Vinod Lodhi" <vinodlodhi@airtelmail.in>
To: "'Lars Christensen'" <perseusdk@gmail.com>; <ccielab@groupstudy.com>
Sent: 20 July, 2008 21:57
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 Lars,
>
> Thank you for the reply.
>
> The solution mentioned provides the AS information you configured under
> BGP
> process. But we need to know what AS Number is remote as is expecting.
> That
> will show only by the debug at neighbor router (which I considered here is
> BB2 (Backbone). Your router will not tell anything as the connected what
> AS
> is expected by neighbor router so that you can configure thru "neighbor
> X.X.X.X local-as YY'.
>
> Either proctor has to give access to BB router or tell us as what AS is
> expected by the BB router.
>
> Thanks..
>
> -----Original Message-----
> From: Lars Christensen [mailto:perseusdk@gmail.com]
> Sent: Sunday, July 20, 2008 7:33 PM
> To: 'Vinod Lodhi'; ccielab@groupstudy.com; ccie-rs@ieoc.com
> 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 Vinod
>
> I believe you won't get any other answer from the proctor that: "You are a
> CCIE candidate, hence you are able to figure out which AS number the BB
> router has been configured with."
>
> And the proctor is right... You actually can identify the right remote AS
> number from the debug output. Try take a look at
> http://fengnet.com/book/Optimal%20Routing%20Design/ch06lev1sec1.html or
> http://www.groupstudy.com/archives/ccielab/200711/msg01765.html
>
> Regards,
> Lars Christensen
> CCIE #20292
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Vinod Lodhi
> Sent: 20. juli 2008 15:51
> To: ccielab@groupstudy.com; ccie-rs@ieoc.com
> Subject: Peer in wrong AS at BB2 router | Will proctor tell us the right
> AS
> or will provide the access to BB router?
>
> 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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>
>
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