The MPLS WG Archive

["Paul Tasillo" <Paul.tasillo@tivoli.com>]

Hi-
	In draft-ietf-mpls-ldp-applic-02.txt it says,

  LDP, together with an IP routing plane and software to program ATM
   switch or Frame Relay switch cross-connect tables, can implement IP
   in a network of ATM and/or Frame Relay switches without requiring an
   overlay or the use of ATM-specific or Frame Relay-specific addressing
   or routing.

In the absence of ATM/FR specific addressing or routing, what is being used
for addressing? If the answer is IP, then am I safe in assuming that this
requires each ATM switch to have an IP address? I understand the ATM
switches will be participating in L3 routing protocols (BGP, OSPF, etc).

Is there also an overlay MPLS model? Where MPLS make decisions on a frame
basis rather then cell and uses ATM/FR specifc addressing and routing?

And are there other MPLS over ATM models that I haven't listed?

Thanks in advance,
Paul