I think this would work, but why would you want to do it? Why not make those
two parts of Area 5 different areas? Simply from a documenation and human
communication point of view, you don't want the design to be confusing. When
someone refers to Area 5, you don't want someone else to have to say "which
Area 5?"

You'll notice that the OSPF RFC covers partitioned areas but only as
something that will work when an area becomes partitioned due to a network
problem. In other words, they don't consider it a good design practice, but
a workaround.

What addressing will you use? OSPF does support discontigous subnets, so you
should be OK. However, avoid making this too complex and remember that it's
important to be able to summarize prefixes when injecting routes into Area 0.

Design books always say to design OSPF hierarchically (and even go so far as
to say that OSPF requires a hierarchical design). But I think a partitioned
area is actually still allowed, just not a good idea? Comments, anyone else?
Thanks.

Priscilla



alaerte Vidali wrote:
> 
> Can you see any mistake in the following network?
> 
> 
> Rx ---area 5------R2----area 0-------R3-------------
>                    |                                |
>                area 0                             |                
>                    |                                |
> Ry ---area 5------R1-------------------------area 0--
> 
> 
> R1, R2 and R3 are connected through area 0.
> 
> R1 and R2 are ABRs for area 5.
> 
> I am wondering if R1 and R2 should be connected through area 5
> for a better design.
> 
> The bad situation I see is that Rx and Ry will have different
> databases, although they are in the same area.  From the
> routing table standpoint there will be conectivity.
> 
> Any Thoughts?




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