Wednesday, August 18, 2021

OSPF topology design

I'm having some difficulties to sort out how to implement areas in my OSPF network - I need areas for summarization. The physical topo looks like this - https://imgur.com/a/54hnXEe

If all routers was in area0, no problem. But how to fix this? As pr OSPF design, DC1 and DC2 must be area0 for traffic being able to travel from area X to Y as it has to be via 0.

Leg1 as area0 with (backup) virtual-link over leg2?

Putting the different legs in separate areas will make area0 ( DC1 and DC2) non-contiguous which will screw things up. That can be be mitigated via virtual-links - but can you duck-tape area0 together via multiple virtual-links over separate areas?

I really appreciate any ideas here. Most textbook stuff about virtual-links seems to be covering simpeler topos.



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