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Interface ID in kompella-unnum-02

  • From: Yakov Rekhter <yakov@cisco.com>
  • Date: Thu, 05 Oct 2000 13:30:41 -0700
  • cc: "'mpls@uu.net'" <mpls@UU.NET>

Jeff,

> I may be wrong but..
> 
> The two values are never used in the same field without any other
> indication, right?
> 
> In a router-LSA, the router-ID is the IP of the router, and if the link type
> is point-to-point, then this is indicated with the type field in the link
> information.  The Link Data field can either be a network mask(type 2 or 3)
> or an ifIndex (type 1). (p133 RFC2328)  Where else is the ifIndex used in
> OSPF?

For numbered p2p links (type 1) the Link Data field "specifies the IP interface
address of the associated router interface" (p128 RFC2328).

Yakov.