Subject: if-stack and link bundling

From: John Muston <[email-masked]>
Date: Mon, 20 Aug 2001 11:22:05 -0500

I'm curious when stacking for link bundling, if a physical interface
might have an mpls interface layered above it in addition to the teLink
interface.

Adapting a picture from section 9.2 of draft-dubuc-mpls-bundle-mib-02.txt,
if a physical interface supports MPLS, might the stack table look
as follows?

           +---------------+
           | mpls          |
           +---------------+
                   |
+-------+  +---------------+  +-------+
| mpls  |  | teLink        |  | mpls  |
+-------+  +---------------+  +-------+
    |          |        |         |
+-----------------+ +-------------------+   
|     oTrans      | |    oTrans         |
+-----------------+ +-------------------+

The idea being either that a physical interface can have LSPs
even if it is participating in a link bundle (if this is possible)
or that joining a link bundle implicitly admin-down's but does
not delete the overlying MPLS interface.