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Wavelength Continuity Constraint RFC3471 defines port and wavelength labels to have only significance between two neighbors Label Set is used to limit the label choices of a downstream node to a set of acceptable labels. This statement seems to imply that the labels carried need to have “global” meaning Key issue is wavelength continuity The port/wavelength label as defined today do not provide global meaning to be used in the Label Set Subchannels field Impossible to differentiate port label from wavelength label Inconsistency between port and wavelength labels makes Explicit Label in ERO difficult to manage RRO with port/wavelength label mix without being able to distinguish the value type is not very useful |