Re: OSPF filtering

so that causes the route to only go through the virtual link as opposed to
"shorter" path that it might find by default

what does the ospf database show you before and after the 'no capability
transit' command?

--
Garry L. Baker
"There is no 'patch' for stupidity." - www.sqlsecurity.com
On Thu, Dec 9, 2010 at 9:39 AM, Rares Donca <rares.donca_at_gmail.com> wrote:
> Hello all,
>
> I'm having a problem with OSPF filtering wtih distributed-list.
>
> The scenario is something like this. R6 is connected to R4 via Area 1, and
> to R1 through a virtual-link.
> R6 has two paths to network 150.1.3.3, which is in Area 0, learned from R4
> and R1 respectively.
> Since Area 1 has the transit capability and the path through R4 has a
> better
> cost, this route is
> placed in the routing table. However on R6 I filtered this specific route
> from R4 with distributed-list
> and route-map.
>
>         Area 1
>  R6 ------------- R4
>    \
>     \
>      \Virtual-link
>       \
>        \
>         R1
>
> After filtering, R6 is not placing the route through Area0 from R1 in the
> routing table.
>
> R6#show ip route 150.1.3.3
> % Subnet not in table
>
> If i disabled the transit capability on R6, then the route through R1 will
> be in the routing table.
>
> R6(config)#router ospf 1
> R6(config-router)#no capability transit
> R6(config-router)#end
> R6#show ip route 150.1.3.3
> Routing entry for 150.1.3.3/32
>  Known via "ospf 1", distance 110, metric 1564, type intra area
>  Redistributing via eigrp 10
>  Advertised by eigrp 10 metric 100000 1000 255 1 1500
>  Last update from 155.1.146.1 on FastEthernet0/0.146, 00:00:09 ago
>  Routing Descriptor Blocks:
>  * 155.1.146.1, from 150.1.3.3, 00:00:09 ago, via FastEthernet0/0.146
>      Route metric is 1564, traffic share count is 1
>
> I don't really understand what is happening here.
>
> Thanks,
> Rares
>
>
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