From: san (san.study@gmail.com)
Date: Sun Jun 05 2005 - 03:54:47 GMT-3
Tim,
I think its specific to ISIS.
ISIS does the summary at the outgoing of ISIS process only.
(configuring summary under router isis). will not effect
redistribute isis under router ospf in same router.....So we have to
summary- address again at router ospf process.
I dont have a reference link to explain more. But this same scenario
came across one IE excercises IE lab 2. (at R2 IGP section)
/SAN
On 4/4/05, ccie2be <ccie2be@nyc.rr.com> wrote:
> Hi guys,
>
> I recall an instance where I had created a summary route in ISIS and then on
> the same router where the summary was created, I also redist ISIS into
> another IGP - I think it was ospf but I'm not 100% sure. And, although I
> hadn't configured any filtering to block the ISIS summary from being redist
> into the 2nd IGP, by default, it was NOT redist.
>
>
> Unfortunately, at the time, I was on a rental rack and I didn't stop to see
> if this same behavior occurs with other IGP's.
>
> So, now I'm wondering about this more broadly.
>
>
> So, here's the scenario:
>
> IGP-1 routes (including a summary created on R1) R1 IGP-2
>
>
> For which combo's of IGP-1 and IGP-2 will the IGP-1 summary be redist into
> IGP-2?
>
>
> a) Never
>
> b) It depends only on IGP-1
>
> c) It depends only on IGP-2
>
> d) It depends on both IGP-1 and IGP-2
>
> Any feedback is greatly welcomed and warmly appreciated.
>
> TIA, Tim
>
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