Download - MAL M PLS A daptation L ayer
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