Subject: [OSPF] Link LSA generation in OSPFv3

From: "fabien.verhaeghe" <[email-masked]>
Date: Tue, 13 Jun 2006 11:30:27 +0200

Hello All,

>From draft-ietf-ospf-ospfv3-update-09.txt section 3.4.3.6 "A router originates a separate link-LSA
for each attached link that supports 2 or more (including the originating router itself) routers"
I understand that a router originates a link LSA only if it has at least one fully adjacent neighbor.

But in section 3.4.3 the link-lsa is note mentionned in the item:

   o  A neighbor transitions to/from "Full" state.  The router may need
      to (re)originate or flush the link's network-LSA and one or more
      router-LSAs and/or intra-area-prefix-LSAs.

Instead it is put in the first item about interface state change.

   o  The state or interface ID of one of the router's interfaces
      changes.  The router may need to (re)originate or flush its link-
      LSA and one or more router-LSAs and/or intra-area-prefix-LSAs.  If
      the router is DR, the router may also need to (re)originate and/or
      flush the network LSA corresponding to the interface.

Does this mean link LSA has to be originate when the interface is up and not when a
first full neighbor appears?

Another point concerning network LSA origination. Shouldn't we have an item stating that
network LSA may be re-originated upon receipt (or purged) of a link-LSA because it may 
entail a change in the option field.

Thanks
Fabien Verhaeghe
Atos Origin 

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