From: Gabriel.Neagoe@xxxxxx
Date: Mon Apr 30 2001 - 06:33:19 GMT-3
the catch here is that as1 is double connected to AS254
AS1 will never be a transit area for 254 beacuse of BGP's routing loop
avoidance algorythm, so you have nothing to do about it
BGP will do it itself
:-)
-----------------------------------------------
Gabriel Neagoe, GN379-RIPE
Networking solutions consultant
Cisco Certified Network Professional
Cisco Certified Design Associate
S&T Romania
tel: +401 20 40 300
fax: +401 20 40 310
-----------------------------------------------
> -----Original Message-----
> From: caolw [SMTP:caolw@fosco.com.cn]
> Sent: Monday, April 30, 2001 10:26 AM
> To: Groupstudy
> Subject: about transit AS
>
> Hi,All:
>
> I have a question about BGP.
>
> (AS254)---r1-(AS1)-r2-(AS1)-r3--(AS254)
>
> 1. r1,r2,r3 are in AS1,
> 2. r1,r3 are border router.r2 is RR.
> peer is AS254
> 3. the request is:donot let AS1 become a transit AS
> 4. Donot use as-path filter.
>
> My answer is use Commumity attri.
> I let r1 and r3's incoming routes set no-export.
> and send-community to r2.
> r2 send-community to r1 r3.
>
> But I know my answer is wrong.
>
> Is anyone have any other solutions?
> Thanks.
> **Please read:http://www.groupstudy.com/list/posting.html
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