From: Eric Poulin (epoulins@yahoo.com)
Date: Mon Jun 25 2007 - 17:42:33 ART
I would definitely use option #2. It can be done with option #1, but keep in mind that
the "backup" command tracks the line protocol. If you use "backup" under the FR main
interface, it will only be down if you lose local LMI with the FR switch or if your
physical interface is down. FR subinterface will be down if end-to-end status is deleted
or inactive. In your task, you could still use "backup", but for end-to-end status, I
would put it under a GRE tunnel (with keepalive) between R4 and R5.
Eric
--- Ben <bmunyao@gmail.com> wrote:
> Hi group
>
> In the above task, routers R4 and R5 have a FR and a PPP link between them.
> The task requirement is for the network to be configured so that the PPP
> link is only used if the FR link is down.
>
> In my mind, this could be done in two ways:
>
> 1. int s0/0 (FR interface)
> backup int s0/1
>
> 2. int s0/1 (PPP interface)
> ip ospf cost 9999
>
>
> Based on the the task requirement, how do you determine which of the above
> ways is the most suitable?
>
> Thanks
>
> Ben
>
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