MPLS-TP NETWORK AND LINK TRACE METHOD THEREOF

摘要

A MPLS-TP network includes a first router, at least one second router, and a third router. The first router is set to a MEP and generates and transmits a link trace packet. The second router is set to an MIP, generates a response packet in response to reception of the link trace packet, transmits the response packet in a direction of the first router, and forwards the link trace packet. The third router is set to the MEP, generates a response packet in response to reception of the forwarded link trace packet, and transmits the response packet in the first router direction.

主权项

1. A multi-protocol label switching-transport profile (MPLS-TP) network, comprising:
a first router that is set to a maintenance entity group (MEG) end point (MEP) and that generates and transmits a link trace packet; at least one second router that is set to an MEG intermediate point (MIP) and that generates a response packet in response to reception of the link trace packet and that transmits the response packet in a direction of the first router and forwards the link trace packet; and a third router that is set to the MEP and that generates a response packet in response to reception of the forwarded link trace packet and transmits the response packet in the first router direction, wherein the link trace packet and the response packet each comprise a first label representing a transmitting segment in which the link trace packet and the response packet each are transmitted and a message representing a link trace function, and the message comprises packet kind information representing one of the link trace packet and the response packet, a label switched path (LSP) identifier representing an LSP between the first and third routers, a tunnel identifier representing a tunnel used, and a node identifier representing a router on the LSP.