Scribe Notes by Satyaki Mahalanabis  ( Y3111042 )  Lecture 32
MPLS and Packet Engineering

Circuit Switching Versus Packet Switching

Multi Protocol Label Switching

Multi Protocol Header Format

Label ( 20 bits )
Class of Service
 S ( Presence of Label Stack )
TTL ( Time to Live  8 bits)


 L2 header
MPLS header
L3 header      L3 data

L2 Header
MPLS Header
MPLS header
L3 header
L3 Data

Recovery from failures