OSPF Address-Family

jskfan
jskfan used Ask the Experts™
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OSPF Address-Family

I have seen  in some examples EIGRP configured with   address-family ipv4 vrf <VRF Name>  autonomous-system <AS Number>
However I have not seen examples where OSPF  is configured with  address-family ipv4 vrf <VRF Name>

for instance, in the topology below Customer Edge CB_1 uses OSPF  and  it is connect to PE_1

Thanks

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Distinguished Expert 2018

Commented:
OSPFv2 does not support address families. Address-families can be configured only if OSPFv3 is in use, and OSPFv3 has less examples around.
Since only IPv4 addresses are present in example above and OSPFv2 is what engineers are familiar with, with typically OSPFv2 example will be easy to find.

Author

Commented:
Thanks JustInCase,

in the topology above, imagine Customer C_B1  use OSPF and the network is 192.168.0.0/24 and also Customer  C_A2 uses OSPF with the same network 192.168.0.0/24

If I understand MPLS, without configuring VRF , there will be no way to separate traffic from each Customer...
in this Case how are you going to deal with 2 Customers using OSPF and have the same Network prefixes ?

Thanks
Distinguished Expert 2018
Commented:
If we are talking about OSPF between PE - CE routers... OSPFv2 can be configured for specific vrf without configuring address-family (it is generally needed just on PE side).

R1(config)# router ospf 1 vrf ?
  WORD  VPN Routing/Forwarding Instance (VRF) name

Author

Commented:
Got it ..Thank you

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