OSPF between DLR and external router via ESG?

[rbaevergreen]

I'm working on my VMUG Advantage home lab, now with NSX!

My home router is a Sophos UTM, so it supports OSPF.

DLR <-- area A --> ESG <-- area B --> Sophos UTM

The DLR and ESG are exchanging routes, as are the ESG and UTM. How do I get the UTM and DLR to know that they need to reach each other through the ESG?

Looks like "route redistribution" from OSPF to OSPF is grayed out.

Thanks.

[Sreec · Accepted solution]

So we have two areas in the configuration . Firstly you need to make sure Interface to Area mapping is correct . Going via your topology it would be like this

DLR Transit (Area A)

ESXG Intenral(AreaA)

ESXG External(Area B) and UTM Internal Internal (Area B) -I would configure this as the backbone area -0

Once after that we need to update dLR which subnets need redistribution -so select Connected and learner protocol OSPF -

[rbaevergreen]

I have those as that except Area A = 23 and Area B = 28

Is the backbone area special in some way?

[rbaevergreen]

Changing it to the backbone area worked.