Opaque LSA in OSPF

[sudha.chandrashekar]

Hi,

Has anyone deployed Opaque LSA feature of ospf which has type 9,10 and 11 LSA's . If so can you please explain scenario used, here application specific information means is it like using labels in MPLS .

My understanding is that instead of using LDP or TDP we can use OSPF to distribute labels to the OSPF domain.

Thanks in anticipation.

[nuno.morais]

Hi.

OSPF Opaque LSAs are used with MPLS TE. They are used to transport info such as link utilization. In a MPLS network with TE RSVP with TE extensions is used for label distribution and tunnel establishment.

Hope this helps.

NM

[sudha.chandrashekar]

Thanks for the information,

I wanted to know any realtime scenario that has been using this already, is it only MPLS TE that used opaque lsa, or any other applications that use this.

Also I wanted to know when is domain-id and domain-tag configurations required in OSPF.

Sudha

[xavierchang]

Nope, only MPLS. The domain-id and domain-tag are also used only for MPLS implementations. So basically, it's only important if you're doing MPLS (which very few organizations are doing).