Re: Off Subject - OPSF best practice

I'm not sure that it makes sense to put each location in its own area,
but it would definitely make sense for the entire WAN distribution
block to be in it's own area. In fact, it's best practice to follow
the physical network design when desiging OSPF areas. If you have
implemented a hierarchical design, then you would want all core
interfaces and distribution interfaces that point to the core to be in
area 0, making the distribution switches the ABRs. Each individual
distribution block should be placed in its own totally stubby area if
possible, so you would have separate areas for WAN, Campus, Data
Center, etc.

You could argue that the network is simple enough to implement OSPF in
a single area, or that you don't need to run OSPF period. However,
this multiarea design takes advantage of the natural two tier
hierarchical design of OSPF, which will ultimately provide improved
convergence, fault isolation, and deterministic traffic patterns. Not
to mention how clean it is when you login to a branch router and all
you see is a single 0.0.0.0 and directly connected routes!

Thanks,
Ronnie

On Tue, Jan 19, 2010 at 7:11 PM, Charles T. Alexander
<charles.t.alexander_at_verizon.net> wrote:
> B
>
> Does it make sense in OSPF from performance for, a firm of 1000 users in
> 16 WAN locations to have different OSPF areas for each office rather than
> putting everyone in Area 0?
>
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Ronald Angello
CCIE 17846
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