Configuring Transparent Transmission of Protocol Packets in a VLAN

Transparent transmission of protocol packets in a VLAN allows the switch to transparently transmit protocol packets in a specified VLAN without sending the protocol packets to the CPU, improving forwarding efficiency.

The switch can transparently transmit the following protocol packets: CFM/ARP/BFD/DHCP/DHCPV6/HTTP/IGMP/MLD/ND/PIM/PIMv6/PPPoE/TACACS.

Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this function.

Procedure

• Configure transparent transmission of protocol packets in a VLAN.
  1. Run system-view

     The system view is displayed.

  2. Run vlan vlan-id

     A VLAN is created and the VLAN view is displayed. If the specified VLAN has been created, the VLAN view is directly displayed.

  3. Run protocol-transparent

     Transparent transmission of protocol packets in a VLAN is configured.

     By default, transparent transmission of protocol packets in a VLAN is disabled.

• Configure transparent transmission of protocol packets in multiple VLANs.
  1. Run system-view

     The system view is displayed.

  2. Run vlan batch { vlan-id1 [ to vlan-id2 ] } &<1-10>

     One or more VLANs are created.

  3. Run vlan range { vlan-id1 [ to vlan-id2 ] } &<1-10>

     A temporary VLAN range is created and its view is displayed. If the VLAN range has been created, this command directly displays the VLAN-Range view.

     Uncreated VLANs cannot be added to a temporary VLAN range.

  4. Run protocol-transparent

     Transparent transmission of protocol packets in VLANs is configured.

     By default, transparent transmission of protocol packets is disabled in VLANs of a temporary VLAN range.

• The vlan range command configuration is not saved in the configuration file. After services are configured in the VLAN-Range view, the service configurations of all the VLANs in the VLAN range will be saved in the configuration file.
• After transparent transmission of protocol packets is configured in a VLAN, the VLAN cannot be configured as a multicast VLAN or control VLAN.
• Before running this command, ensure that IGMP or MLD snooping has been disabled in the VLAN. Otherwise, the configuration may fail.