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Example of ROADM Ring LSPs in ROADM Rings LSPs from West Tributary Ports are terminated at East Tributary Ports This is also true for the case of vice versa. Label Allocation Approach 1 Routing Solve Label Allocation (Bit-map advertisement) (draft-shiba-ccamp-gmpls-lambda-labels-01.txt) Approach 2 Signaling Solve Label Allocation (Label Set + Null Upstream) IP Router #B NNI-W TE-Link of Tributary-W IP Router #B TE-Link of Tributary-E NNI-E IP Router #A IP Router #A NNI-E TE-Link of Tributary-E TE-Link of Tributary-W NNI-W |