[c-nsp] core OSPF configurations

[Brian Spade]

Thanks Pete & Pete for your insight.  :-)

  I was hoping to get more feedback from engineers, but this definitely
helps.

/bs

On Tue, Feb 3, 2009 at 7:20 AM, Pete Templin <petelists at templin.org> wrote:

> Brian Spade wrote:
>
>  What is the best way to configure OSPF to inject all 50+ SVIs into the
>> routing domain?
>>
>> Would you configure network statements for all SVI networks and passive
>> the
>> interfaces?
>> Would you configure OSPF on the uplink interfaces only and redistributed
>> connected to create type-5 externals?
>>
>
> If it were me, the SVIs would be announced into BGP, so that my OSPF world
> stayed small and clean.
>
> That said, remember that the network statement(s) only have to match,
> through wildcard math, the _IP addresses_ of the interfaces to be included
> in OSPF.  If you run a single area, 'network 0.0.0.0 255.255.255.255 area 0'
> is all you need.  Flipside, if you want to lock down OSPF to the point that
> shifting an interface within a subnet causes OSPF to drop so you can catch
> the culprit in the act, 'network 10.20.30.254 0.0.0.0 area 0' matches
> exactly that one address (but the interface's correct netmask is used when
> inserting the route into OSPF).
>
> pt
>