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Understanding OSPF For MPLS Superbackbone.

LSA1 is Router LSA And LSA2 is Network LSA.What is the difference between them?In which direction are they propogated?I need to understand it neatly as I am studying it for MPLS Superbackbone .

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Cisco Employee

Re: Understanding OSPF For MPLS Superbackbone.

In short, the router LSA is generated by all routers and describe all the connected interfaces on that router.

The network LSA is generated by the Designated Router (DR) only and describe all the routers connected to the broadcast or NBMA network for which this router is the DR.

If you need more information on what the LSA are for and the details of OSPF in general, I would recommend you read RFC2328.

Here's the link for it:

http://www.ietf.org/rfc/rfc2328.txt?number=2328

Hope this helps,

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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