| 摘要 |
<p>A method for identifying the monitoring sub-layer with the use of EXP field includes: Step A, when enabling the monitoring sub-layer function of the label switched path in the multi-protocol label switching network, the label switching router at the incoming port of the monitoring sub-layer generating and forwarding the Operations, Administration and Maintenance OAM identification packet, the protocol data unit of the OAM identification packet including only one identification entry, and the EXP field of the identification entry being used for identifying the monitoring sub-layer; step B, the label switching router at the out-coming port of the monitoring sub-layer identifying and processing the OAM identification packet, if the EXP included in the received OAM protocol data unit belonging to the mapping value of the current monitoring sub-layer, then processing the payload of the OAM protocol data unit and terminating the forwarding of the OAM identification packet, otherwise, forwarding or discarding the received OAM identification packet. With the invention, the disadvantage of wasting the bandwidth resource of the MPLS path in the manner of identifications overlapping could be avoided, and the ability of the network in transmitting the client information could be increased.</p> |
