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NE20E-S2 V800R010C10SPC500 Configuration Guide - Security 01

This is NE20E-S2 V800R010C10SPC500 Configuration Guide - Security

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Configuring the DHCP Snooping Packet Sending Method

Configuring the DHCP Snooping Packet Sending Method

Usage Scenario

When DHCP snooping unicast packets are forwarded using CPU, the EXP values of MPLS packets sent to the tunnel side are mapped to the DSCP values (equal to the EXP values) of IP packets. After CPU forwarding is disabled for DHCP snooping unicast packets, DHCP snooping unicast packets are forwarded using hardware. The EXP values of MPLS packets sent to the tunnel side are mapped to the DSCP values (6 by default) of IP packets based on the DSCP-EXP mappings specified using the host-packet dscp map command.

Procedure

  1. Enable DHCP snooping.

    1. Run system-view

      The system view is displayed.

    2. Run dhcp enable

      DHCP is enabled globally.

    3. Run dhcp snooping enable

      DHCP snooping is enabled.

  2. Configure the DHCP snooping packet sending method.

    1. Run dhcp snooping unicast cpu-forward disable

      Hardware forwarding is configured for DHCP snooping unicast packets.

    2. Run commit

      The configuration is committed.

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Updated: 2019-01-02

Document ID: EDOC1100055397

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