On Wed, May 06, 2015 at 04:10:49PM +0000, Andreas Schultz wrote:
> I have a router that gets it default route from OSPF from two different
> routers. Both send different metrics, but ospfd is always importing
> both routes. I've tried playing with different metrics and metric-type
> without success.
> 
> As far as I can tell the metric are received correctly
> (show ip ospf database external contains the correct metrics), but they
> are not applied.
> 
> Any idea????

It's probably correct behaviour -- only the first route/LSA entry is
used, but I'm guessing its forwarding address is reachable with equal
cost through the two nexthops you have in the final table.

>   LS Type: AS-external-LSA
>   Link State ID: 0.0.0.0 (External Network Number)
>   Advertising Router: 172.20.16.49
>         Metric Type: 1
>         Metric: 50
>         Forward Address: 172.20.16.1
>
>   LS Type: AS-external-LSA
>   Link State ID: 0.0.0.0 (External Network Number)
>   Advertising Router: 172.20.16.50
>         Metric Type: 1
>         Metric: 100
>         Forward Address: 172.20.16.1

The second LSA should indeed be ignored;  however, the first LSA uses
172.20.16.1 as nexthop, which in turn is probably reached at equal cost
through .9 and .10, resulting in both paths installed.

> O>* 0.0.0.0/0 [110/70] via 172.29.0.9, vnf-xe1p1, 00:22:13
>   *                    via 172.29.0.10, vnf-xe1p1, 00:22:13

Can you show the route table entry for 172.20.16.1 to confirm this?


-David

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