Upstream label allocation on ethernets for MP2MP LSPS

摘要

An apparatus or method for upstream label allocation on LANs for multipoint (MP) label switched paths (LSPs). In one embodiment of the method, a first router receives a first incoming labeled data packet, wherein the first incoming labeled data packet comprises a first data packet and one or more first labels. The first router creates a first outgoing labeled data packet, wherein creating the first outgoing labeled data packet includes the step of swapping the one or more first labels of the first incoming labeled data packet with a context label and a forwarding label, wherein the first outgoing labeled data packet comprises the first data packet, the context label, and the forwarding label. Ultimately, the first router transmits the first outgoing labeled data packet to second and third routers via a LAN.

主权项

1. A method comprising:
a first router receiving a context label and a forwarding label from a second router, wherein
the first and second routers are coupled to a LAN,the second router is an upstream router to the first router, andthe context label distinguishes the second router that is coupled to the LAN from other routers coupled to the LAN; the first router receiving a first incoming labeled data packet, wherein
the first incoming labeled data packet comprises a first data packet and one or more first labels; the first router creating a first outgoing labeled data packet, wherein
the creating the first outgoing labeled data packet comprises an act of swapping the one or more first labels of the first incoming labeled data packet with the context label and the forwarding label, andthe first outgoing labeled data packet comprises the first data packet, the context label, and the forwarding label; a LAN switch receiving a first frame at a first LAN port that is coupled to the first router, wherein
the first frame comprises the first outgoing labeled data packet, andthe first frame comprises a MAC address; and the LAN switch transmitting a copy of the first frame out of second and third LAN ports that are coupled to the second router and a third router, respectively.