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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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(Optional) Configuring TTL and EXP Processing Modes for MPLS Packets with Label 7

(Optional) Configuring TTL and EXP Processing Modes for MPLS Packets with Label 7

This section describes how to configure the mode of handling the TTL and EXP fields carried in MPLS packets with label 7 on the egress PE.

Prerequisites

When MPLS packets with label 7 are sent out of a public network, the mode of handling TTL and EXP fields can be set to uniform or pipe.

NOTE:

This configuration task is supported only on the Admin-VS.

To configure TTL and EXP handling modes for MPLS packets with label 7, configure MPLS functions.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run mpls

    The MPLS view is displayed.

  3. Run entropy-label ttl-mode { uniform | pipe }

    A mode of handling the TTL field in MPLS packets with label 7 is set.

    • uniform: The egress reduces the MPLS TTL by one, compares it with the IP TTL, and propagates the smaller value to the IP TTL field before forwarding the packet.
    • pipe: The egress reduces the IP TTL by one, without propagating the MPLS TTL to the IP TTL.

  4. Run entropy-label exp-mode { uniform | pipe }

    A mode of handling the EXP field in MPLS packets with label 7 is set.

    • uniform: The egress PE copies the EXP value in an MPLS packet to the EXP field in the IP or inner packet.
    • pipe: The egress PE does not copy the EXP value in an MPLS packet to the EXP field in the IP or inner packet.

  5. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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