l3vpn diffserv-mode short-pipe enhance enable

Usage Scenario

In L3VPN scenarios, packets sent by the device enter queues based on the following default rules:

• In Uniform mode, the ingress PE puts the packets into queues based on DSCP values, and the egress PE puts the packets into queues based on EXP values.
• In Pipe mode, both the ingress PE and egress PE put the packets into queues based on EXP values.
• In Short Pipe mode, the ingress PE puts the packets into queues based on EXP values, and the egress PE puts the packets into queues based on DSCP values.
  In L3VPN scenarios with the Short Pipe mode configured, if the ingress PE and egress PE are the same node, packets enter queues based on EXP values by default, which does not comply with the rule of putting packets leaving the public network into queues based on DSCP values in Short Pipe mode. To resolve this issue, set the enhanced Short Pipe mode so that packets on the ingress PE enter queues based on DSCP values.

Precautions

The l3vpn diffserv-mode short-pipe enhance enable command configuration takes effect only after the DiffServ mode is set to Short-Pipe.

In an NG MVPN scenario, if the MPLS DiffServ mode of the ingress is set to Short Pipe, packets for multicast traffic entering the public network tunnel and packets forwarded by the local VPN instance are put into queues all based on carrier-specified priorities. After the l3vpn diffserv-mode short-pipe enhance enable is run, these packets are put into queues all based on the DSCP values of user packets.