The MPLS WG Archive

[Eric Gray <eric.gray@sandburst.com>]

Kireeti,

    Out of curiosity, how many un-numbered interfaces can
B have that are known to it as interface 1?

--
Eric Gray

You wrote:

Vach, Yakov,

> > The other aspect is the first clause of the quoted sentence above from the
> > rsvp-unnum draft: "all initial subobjects that refer to itself."
>
> The text needs to be clarified to say something like "all initial subobjects
> of type other than Unnumbered Interface ID"...".

While the change in text is possible, it is clear that, unless the
interface is physically looped back to itself, the second subobject
does *not* refer to "itself".

             1       1       1
         A ----- B ----- C ----- D

B receives an ERO of (1, 1, 1) from A (PHOP).  B checks that (A, 1)
refers to itself, removes it.  Now it sees unnum interface 1, which
clearly points at C.  Why would B think that this "1" refers to B?

Kireeti.