[c-nsp] OSPF areas?

[Peter Salanki]

Are you building a service provider network or an enterprise/campus  
network?

For all networks with fully deployed BGP (SP networks), it is  
recommended that you only have loopbacks in IGP, and all customer  
routes in iBGP. If this is the case, then only a single area is  
required.

If you are building an enterprise/campus network without BGP  
deployment, areas could be a good idea.

/Peter Salanki
Bahnhof AB
Stockholm, Sweden

On Mar 23, 2006, at 10:22 AM, Vincent De Keyzer wrote:

> Hello,
>
>
>
> in a real network, what are the pros and cons of using OSPF areas ?
>
>
>
> I see the following pros:
>
> *	reduced routing tables (visually when doing a 'sh ip ro', and in
> RAM) thanks to summarisation
> *	reduced CPU usage since route flaps are not seen outside of the area
>
>
>
> and the following con: additional complexity.
>
>
>
> Did I forget something?
>
>
>
> Vincent
>
>
>
>
>
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