From: Stephen Fisher (stephentfisher@yahoo.com)
Date: Tue May 24 2005 - 23:49:43 GMT-3
On Wed, May 25, 2005 at 10:13:31AM +0800, Loi, Choon Ho wrote:
> r1
> |
> |
> r3-----------r2
>
> If I have r1 and r3 running ospf and r2 and r3 running eigrp, How can
> I select the route updates base on the IGP routing protocol? Let's say
> I want r3 to use the eigrp advertised route if the r2--r3 link is
> available. Use the ospf advertised route only if r2--r3 link is not
> available.
I assume there are the same route(s) coming from R1 & R2 just through
different protocols into R3? This would be handled with administrative
distances and the fact that when the link to r2 goes down, its routes
are removed from the routing table anyway.
Default administrative distances: OSPF = 110, EIGRP Internal = 90, EIGRP
External = 170. The lowest distance route is inserted into the IP
routing table. These default distances can be overridden with
configuration commands.
Steve
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