Method and system for managing network traffic

A system for managing network traffic, comprising:

• an internet protocol (IP) network for communicating traffic, the IP network comprising a plurality of nodes coupled by IP links;
• a wavelength division multiplex (WDM) topology coupled to the IP network, the WDM topology comprising a plurality of lightpaths operable to communicate optical traffic;
• and
• a controller operable to:
• provision the IP network for communicating traffic;
• monitor the IP network for a congestion event;
• upon detecting a congestion event, select a label switched path (LSP) of the IP network for reroute;
• compute a hybrid path route for the selected LSP between a first node and a second node of the plurality of nodes, the hybrid path route comprising at least one of the plurality of lightpaths of the WDM topology;
• determine whether performance of the hybrid path route for the selected LSP reduces costs;
• and
• if the hybrid path route reduces costs:
• activate a new IP link on each of the at least one lightpaths of the plurality of lightpaths of the WDM topology;
• and
• reroute the selected LSP according to the hybrid path route.

Logic for managing network traffic, the logic encoded in media and operable when executed to:

• provision an internet protocol (IP) network for communicating traffic, the IP network comprising a plurality of nodes coupled by IP links;
• monitor the IP network for a congestion event;
• upon detecting a congestion event, select a label switched path (LSP) of the IP network for reroute;
• compute a hybrid path route for the selected LSP between a first node and a second node of the plurality of nodes, the hybrid path route comprising at least one lightpath of a wavelength division multiplex (WDM) topology coupled to the IP network;
• determine whether performance of the hybrid path route for the selected LSP reduces costs;
• and
• if the hybrid path route reduces costs:
• activate a new IP link on each of the at least one lightpaths of the WDM topology;
• and
• reroute the selected LSP according to the hybrid path route.

A system for managing network traffic, comprising:

• means for provisioning an internet protocol (IP) network for communicating traffic, the IP network comprising a plurality of nodes coupled by IP links;
• means for monitoring the IP network for a congestion event;
• means for, upon detecting a congestion event, selecting a label switched path (LSP) of the IP network for reroute;
• means for computing a hybrid path route for the selected LSP between a first node and a second node of the plurality of nodes, the hybrid path route comprising at least one IP link and at least one lightpath of a wavelength division multiplex (WDM) topology coupled to the IP network;
• means for determining whether performance of the hybrid path route for the selected LSP reduces costs;
• and
• if the hybrid path route reduces costs:
• means for activating a new IP link on each of the at least one lightpaths of the WDM topology;
• and
• means for rerouting the selected LSP according to the hybrid path route.

A method for managing network traffic, comprising:

• provisioning an internet protocol (IP) network for communicating traffic, the IP network comprising a plurality of nodes coupled by IP links, each of the plurality of nodes comprising an IP router;
• monitoring the IP network for a congestion event;
• upon detecting a congestion event, selecting a label switched path (LSP) of the IP network for reroute;
• receiving a transformed topology constructed by an optical transport service provider of a wavelength division multiplex (WDM) topology, the transformed topology comprising a subset of available lightpaths of the WDM topology, each lightpath of the WDM topology coupling optical crossconnects of the WDM topology;
• computing, based on the transformed topology, a hybrid path route for the selected LSP between a first node and a second node of the plurality of nodes, the hybrid path route comprising at least one IP link and at least one lightpath of the WDM topology coupled to the IP network;
• determining whether performance of the hybrid path route for the selected LSP reduces costs;
• if the hybrid path route reduces costs:
• activating a new IP link on each of the at least one lightpaths of the WDM topology;
• and
• rerouting the selected LSP according to the hybrid path route;
• and
• decommissioning an idle IP link after rerouting the selected LSP.