Abstract: A transit/egress node in a communication network uses a performance measured flow (PMF) identifier for statistics collection for a given PMF. The PMF identifier is carried in the piggy backed information without the use of separate SR label. The Piggy backed information carries the node information role of the node used by the transit egress node to collect statistics for a given PM segment. The node collects the statistics for multiple segments and multiple PM types using a metadata present in single received packet.

Abstract: A transit/egress node in a communication network uses a performance measured flow (PMF) identifier for statistics collection for a given PMF. The PMF identifier is carried in the piggy backed information without the use of separate SR label. The Piggy backed information carries the node information role of the node used by the transit egress node to collect statistics for a given PM segment.

Abstract: The present disclosure provides performance measurement (PM) for segment routing (SR) with flexibility to have PM information piggy backed, preferably using service function chaining (SFC) to data packet itself or dedicate PM packet avoiding change in data packet. A performance measured flow (PMF) identifier is used by transit/egress nodes for statistics collection for a given PMF. The PMF identifier is carried in the piggy backed information without the use of separate SR label. The Piggy backed information carries the node information role of the node used by transit egress nodes to collect statistics for a given PM segment. The present disclosure collects the statistics for multiple segments and multiple PM types using a metadata present in single received packet, saving bandwidth and making PM calculation fast and more accurate. Using the present disclosure, the timer/configuration requirement per performance measurement instance from transit/egress node is avoided.

Abstract: The present disclosure provides system, method and apparatus for implementing fast reroute (FRR). The present disclosure provides a mechanism to associate working LSPs with a FRR LSP to protect against the node/link failures and can switch the traffic immediately upon LSP failure. Further, the present disclosure enables to communicate the status of FRR in use to the PCE so as to have centralized control over the FRR mechanism.

Abstract: The present disclosure provides system, method and apparatus for implementing fast reroute (FRR). The present disclosure provides a mechanism to associate working LSPs with a FRR LSP to protect against the node/link failures and can switch the traffic immediately upon LSP failure. Further, the present disclosure enables to communicate the status of FRR in use to the PCE so as to have centralized control over the FRR mechanism.

Abstract: The present disclosure provides performance measurement (PM) for segment routing (SR) with flexibility to have PM information piggy backed, preferably using service function chaining (SFC) to data packet itself or dedicate PM packet avoiding change in data packet. A performance measured flow (PMF) identifier is used by transit/egress nodes for statistics collection for a given PMF. The PMF identifier is carried in the piggy backed information without the use of separate SR label. The Piggy backed information carries the node information role of the node used by transit egress nodes to collect statistics for a given PM segment. The present disclosure collects the statistics for multiple segments and multiple PM types using a metadata present in single received packet, saving bandwidth and making PM calculation fast and more accurate. Using the present disclosure, the timer/configuration requirement per performance measurement instance from transit/egress node is avoided.