OSPF Process Question

[jjbennett9]

Since ospf process ids are locally significant, can I use multiple processes to advertise separate interfaces?

For example:

router ospf 1

network 10.0.0.1 0.0.0.0 area 0

router ospf 2

network 10.0.1.1 0.0.0.0 area 0

Now I tried this on one router, and setup ospf on the other router (R2).

Now R2 shows them as neighbors but network for 10.0.1.1 does not

show up in the routing table. Is this Possible?

[Edison Ortiz]

They are locally significant but if R1 established its neighbor interface with R2 via 10.0.0.1, it will only advertise routes to R2 learned via OSPF Routing Instance 1.

In order for R2 to learn routes learned via OSPF Routing Instance 2 from R1, they need to be redistributed into OSPF Routing Instance 1.

When you see references about being locally significance is that you can flip the routing instances, for instance

router ospf 2

network 10.0.0.1 0.0.0.0 area 0

router ospf 1

network 10.0.1.1 0.0.0.0 area 0

and let's say R2 has:

router ospf 1

network 10.0.0.2 0.0.0.0 area 0

As you see, the OSPF process ID does not match but they can become neighbors.

HTH,

__

Edison.