From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Mon Oct 30 2006 - 17:43:28 ART
Is the real AS 100 somewhere else in the topology? If so what happens
when it receives the routes passed through BB3 if the no-prepend option
was not configured?
Brian McGahan, CCIE #8593 (R&S/SP)
bmcgahan@internetworkexpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Mohamed Saeed
> Sent: Monday, October 30, 2006 1:34 PM
> To: ccielab@groupstudy.com
> Subject: IEWB - Ver3 - Lab 2 - Task 5.3 (Local-as)
>
> Hi All,
>
>
>
> In this task, it was required to configure SW1 to appear to BB3 as if
it
> was in AS 100. The solution guide solved it as follow:
>
>
>
> On SW1:
>
>
>
> router bgp 400
>
> neighbor 204.12.1.254 local-as 100 no-prepend
>
>
>
> This way, BB3 will see the routes received from SW1 with AS path 100
> 400.
>
>
>
> The "no-prepend" option was used here to prevent SW1 from prepending
> this imaginary AS number (100) to the routes received from BB3. I do
> agree that this should be done.
>
>
>
> My question is that using the "no-prepend" option was not explicitly
> required in the task, will we lose points in a real lab exam for using
> it. What if we used the "replace-as" option also. It could be used to
> make BB3 sees the routes received from SW1 with AS path of 100.
>
>
>
> Regards
>
> Mohamed Saeed, CCNP - CCIP
>
>
This archive was generated by hypermail 2.1.4 : Wed Nov 01 2006 - 07:29:07 ART