From: Peter van Oene (pvo@xxxxxxxxxxxx)
Date: Sat Aug 03 2002 - 14:52:13 GMT-3
Hey Tom,
There is no need to synchronize IGP and BGP next hops. In most if not all
cases, they will not match, nor are they intended to. You do however need
to have an IGP route toward the BGP next-hop in order to use a particular
BGP route.
At 12:51 PM 8/3/2002 -0400, Tom Larus wrote:
>I am working on a practice scenario in which we cannot disable
>synchronization, and I am finding that I am several "no valid path" errors
>in my BGP debug output. I thought that when we have to use synchronization,
>we should redistribute BGP into the IGP at the edges of the IGP. That would
>not, however, make the next hop of each IGP route match up with the next-hop
>of the BGP route. Any advice on this.
>
>Do we redistribute just at the edge of each IGP, or on each router?
>
>Am I supposed to put "next-hop-self" on every BGP router? Even then, I
>might have to tinker with IGP metrics and ADs to make sure the IGP next-hop
>and BGP next-hop agree.
>
>"No syn" makes everything work fine, but that is not an option.
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