| 摘要 |
An apparatus comprising a processor configured to send a first notification message to a first label switch router (LSR) to discover the upstream multipoint Label Distribution Protocol (mLDP) LSR, wherein the apparatus is configured to couple to the first LSR, and wherein the first LSR is not an mLDP LSR, receive a second notification message from the upstream mLDP node, and in response to receiving the second notification message, establish an mLDP Label Switch Path (LSP) to the upstream mLDP node via the first LSR.
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