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In the current PWE3 standard, although there is no
requirement for fate-sharing on the outer LSP tunnels, bidirectional service,
including CES, ATM and FR, can be supported well over PWE3. Is there some
difference between the service requirements on PWE3 and those on bidirectional
TE LSP? With the deployment of P2MP TE LSP, the bandwidth consumption
over a link will become more asymmetric. The bidirectional TE LSP without
fate-sharing requirement will maximize the utilization of the total network bandwidth
resource because the forward LSP and backward LSP can travel over the different
physical paths. Any comment is welcomed. Best regards, Steven Xu |