| 摘要 |
A packet transport network system includes a first node to transmit a control packet through a secondary port, when the first node does not periodically receive, through a primary port, a continuity check packet transmitted on the first MLSP set in the first direction; and a second node, when the second node receives the control packet through a secondary port, to relay or terminate packets on the first and second active MLSPs, to receive, through the primary port, the multicast packet transmitted on the second MLSP set in the second direction, and to bridge the received multicast packet to a recovery path set in an interested link, the second node periodically receiving, through a primary port, the continuity check packet transmitted on the second MLSP set in the second direction, wherein the first node receives, through the second port, the multicast packet bridged to the recovery path. |
| 主权项 |
1. A packet transport network system comprising:
a plurality of nodes connected to one another by a plurality of links to form a network, each of the nodes being configured to relay or terminate packets on first and second active multicast label switched paths (MLSPs) of an active MLSP set, the plurality of nodes including
a starting node configured to distribute a multicast packet and to branch the multicast packet in a first direction and a second direction different than the first direction,a first node configured to receive the multicast packet from the starting node in the first direction when periodically receiving, from the starting node, continuity check packets through a primary port of the first node on the active MLSP set in the first direction, and transmit a control packet provided for a request for recovery through a secondary port of the first node, when the first node not receiving, through the primary port of the first node, continuity check packets provided for path monitoring and transmitted on the active MLSP set in the first direction, anda second node, when the second node receives the control packet through a secondary port of the second node, configured to receive, through a primary port of the second node, the multicast packet transmitted on the active MLSP set in the second direction, and bridge the received multicast packet to a recovery MLSP set, the second node periodically receiving, through the primary port of the second node, continuity check packets transmitted on the active MLSP set in the second direction,wherein the first node receives, through the secondary port of the first node, the multicast packet bridged to the recovery MLSP set. |
