Evolution of a Standard
Step 1. MPLS: Multi-Protocol Label Switching
- IP packet based
- Traffic Engineering for Packet LSPs (MPLS-TE - Step 2)
Step 3. MPlS: Multi-Protocol Lambda Switching
- MPLS control applied on optical channels (wavelengths/lambda’s) & first “optical” IGP TE extensions
- New Protocol introduction for Link Management (LMP)
Step 4. GMPLS: Generalized MPLS
- MPLS control applied on layer2 (ATM/FR/Ethernet), TDM circuits (SDH/Sonet) and Optical channel and
- IGP TE extensions including OSPF & IS-IS
GMPLS: “separation” b/w Technology dependent and independent
- LMP extended to “passive devices” via LMP-WDM
- GMPLS covers G.707 SDH, G.709 OTN…