From: Sandro Ciffali (sandyccie@xxxxxxxxx)
Date: Tue Jul 30 2002 - 15:52:37 GMT-3
R3 and R5 link is equidistance to R1, Thus all the
parameter for this link as seen by R1 are same, If you
make the loopback address of R2 smaller than R4, then
R1 will automaticaly send the traffic for that link
over R2.
Sandeep
--- ying c <bf5tgh1@yahoo.com> wrote:
> Hi,
>
> Here's one of the question that I wonder one of you
> smart guys may have an answer:
>
> R1------R2-------R3
> \ | |
> \-----R4-------R5
>
> R1 is in AS100, R2 and R4 are in AS200, R1, R2, R4
> are
> running BGP. R2, R4, R3 and R4 are running OSPF. R2
> and R4 both peer with R1 and send full ospf specific
> routes to R1.
>
> The requirement is to have R1 always use R1-R2 link
> as
> the primary route to reach the network between R3
> and
> R5. Normally, we would use MED, AS-PATH or aggregate
> routes to achieve this. However, here's the tricky
> part: you are not allowed to use MEDs and not to
> change the configuration on R1 or R4 to accomplish
> this.
>
> I did it by using a lower metric number when I
> redistribute ospf into bgp in R3, but I think this
> pretty much violated "not to use MEDs" rule. Is
> there
> any other way to solve it?
>
> Thanks,
> Chang
>
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