From: san (san.study@gmail.com)
Date: Sat Jun 04 2005 - 20:22:08 GMT-3
Yes Manoj,
I have seen filtering of updates using as-path to neighbor AS...so
this AS will not be used as a Transit AS.
But need to check, if question is asking not to use.
/SAN
On 6/4/05, Kumar, Manoj <manoj.kumar@citigroup.com> wrote:
> Hi Gents,
>
> My question is with reference to Task 6.5/6.6in IEWB Vol I, Lab 3.
>
> The tasks, in brief, ask us to ensure AS 100 doesn't allow a transit for traffic fromAS 300 and AS 200 towards
> AS 54. The configuraiton should be done only on R6 in AS 100.
>
> AS 200 (R5) --------- ------ (R1) ------- AS 54 (BB1)
> -------- AS 100 (R6)-------
> AS 300 (R2)---------- ------ (R3) ------- AS 54 (BB3)
>
> IEWB Solution Guide Suggests to using COMMUNITY (inbound) on the neighbor statement towards the two AS 54 EBGP Peers (BB1 and BB3).
>
> If I choose to use 'ip as-path access-list 10 permit ^$ ' using route-maps on to those BB routers , do you think that will be a correct solution - AS 100 will forward only the local-AS routes to AS54 and will not become a transit
>
> Appreciate your valuable comments please.
>
>
> Thanks,
> manoj
>
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