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Signaling interwork issues: Bi-directionality In GMPLS, the bidirectional LSP can be created: forward and reverse data paths follow the same route. In MPLS, forward and backward LSPs must be created in different signaling sessions – Coordination between them is required. GMPLS GMPLS MPLS G1 G3 G4 G6 G2 G5 GPLS MPLS G1 G3 G4 G6 G2 G5 GMPLS-MPLS GMPLS-MPLS-GMPLS (same as 00version) |