The MPLS WG Archive

["Thomas D. Nadeau" <tnadeau@cisco.com>]

         Alex,

>Thomas,
>
> >>Note too that the interface index cannot be made bigger than 2^24;
> >>this is so that the distinction between IP addresses and interface
> >>indices is clear.  Given that, and given the fact the SNMP ifIndexes
> >>can be 32 bits, ifIndexes are ruled out as potential interface
> >>indices.
>
> >          Personally, this seems like a flaw in the design. The type
> > ifIndex has been around for quite a long time. I don't see how
> > the ifIndex in OSPF/ISIS was allowed to use a different size
> > while claiming that one could put use an ifIndex from the Interfaces
> > MIB.
>
>I don't want confusion here,

         Neither do I. *)

>ifIndex is 32-bit, so is the Link Data field in OSPF router-LSA.
>So OSPF is fine, actually. You won't find "IfIndex" in ISIS
>spec :)
>
>But in fact we're not much concerned about legacy OSPF/ISIS,
>we should be talking about TE extensions. And they also use 32 bits.
>So, the size is fine again :)

         Okay, perhaps I misunderstood the original
question. Thanks for the clarification.

         --Tom