Ciena

Aspects of the subject disclosure may include, for example, generating, by a processing system including a processor, an error estimate based on information from a carrier phase recovery system that digitally recovers a carrier phase associated with a signal, deriving, by the processing system, filter coefficients based on the error estimate, and using, by the processing system, the filter coefficients to perform EEPN compensation relating to the signal, wherein a correlation time of at least one of the filter coefficients is substantially equal to a relative delay associated with digital compensation of chromatic dispersion relating to the signal. Other embodiments are disclosed.

Systems and methods for building routing tables for use in a data center network are provided. In one embodiment, a switch is arranged in a network environment having a plurality of switches. The switch includes a plurality of inward-directed ports configured for direct connection with a plurality of servers and a plurality of outward-directed ports configured for direct connection with a subset of the plurality of switches. The switch also includes a processor configured to generate a Routing Table (RT) in an RT build process and to create a Forwarding Table (FT) for forwarding packets when the RT build process is complete. The outward-directed ports are configured to forward packets to one or more switches of the subset of switches according to the RT. The FT includes at least a Shortest Path (SP) route and one or more Off-Shortest Path (OSP) routes for forwarding the packets to the one or more switches.

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