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New Member

multi-vrf ce and ospf domain-tag

I have configured an mpls vpn between two customer's sites. In every site I have installed two cat35xx with a multi-vrf ce.

I have a multi access ospf neighbour ship to the customer equipments and a bgp session to mpls backbone.

The ospf routes are redistributed on bpg and vice versa.

On ospf process can I use domain-tag to prevent routing loop?

How can i do to verify the domain-tag's functionality in this architecture?

I've tried to configure domain-tag but the ospf database contains all tagged routes but how can i be confident that these routes'll not be announce back to mpls backbone through bgp session between catalyst 35xx and Pe?

Is the the domain-tag functionality supported with vrf-lite?

Thanks in advance


Re: multi-vrf ce and ospf domain-tag


you can check the OSPF database of your PE and its routing table. The respective routes should be visible in the database, but not in the routing table.

Regards, Martin

New Member

Re: multi-vrf ce and ospf domain-tag

Hi Martin,

I've ospf process running only on catalyst 3550 with vrf-lite, the ospf routes are announced to the PE through bgp session configured between the catalyst 3550 and the PE.

Does the vrf-lite support the same functionalities of native PE-CE ospf in the mpls vpn, as domain-tag?

Thanks in advance


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