MAL Slide 1

MALMAL

MMPLSPLSAAdaptationdaptationLLayerayer

SG13 – futures session

25 July 2003

Yaakov (J) Stein

MAL Slide 2

Q5 Q5 Service InterworkingService InterworkingBrainstormingBrainstorming

MAL is a BAD name for this talk

it is about Service Interworking

Temporary new definition of SI (broader than Y.1401 definition)

CONSTRUCTION OF ROBUST CLIENT CONNECTIVITY

FROM A CONCATENATION OF SUBNETWORKS

OF DISSIMILAR TECHNOLOGIES

WHILE PRESERVING KEY SERVICE ATTRIBUTES

MAL Slide 3

Focus on MPLSFocus on MPLS

MPLS benefits from experience with

ATM, SDH, FR, Ethernet, IP, etc.

Many of us believe that MPLS will last forever

or for 10 years, whichever comes first

We don’t yet sell an MPLS service

and we don’t want to

MAL Slide 4

Coexistence & MigrationCoexistence & Migration

SDH

MPLS

ATM

interface

user services

user services

services sold

FR IP

MAL Slide 5

Traffic TypesTraffic Types

Real-time constant rate

Real-time variable rate

Non-real-time packet

MAL Slide 6

MatchingMatchingTraffic to networkTraffic to network

Network-specific interfaces increase interworking complexity

Not equally easy to put traffic types on networks

For example:

– RT constant-rate on SDH easy

– RT constant-rate on ATM harder

– RT constant-rate on MPLS challenging

MAL Slide 7

MALMAL

To facilitate co-existence and migration to MPLS

define a single interface per traffic type

MAL-0 type agnostic

MAL-C for real-time constant rate

MAL-V for real-time variable rate

MAL-P for non-real-time packet