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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Configuring a Static Multicast MAC Address

Configuring a Static Multicast MAC Address

After a static multicast MAC address is configured on interfaces, multicast packets destined for the multicast MAC address are forwarded only to the interfaces.

Pre-configuration Tasks

Before configuring a static multicast MAC address, complete the following task:
  • Creating a VLAN and adding the interface that needs to be configured with a static multicast MAC address to the VLAN

Context

By default, Layer 2 devices broadcast all the received multicast data packets in VLANs. This wastes network bandwidth and threatens network security. To suppress broadcast packets, you can configure IGMP snooping on the switch modules to create Layer 2 multicast forwarding entries or manually configure multicast MAC addresses on interfaces to create multicast MAC address entries.

After multicast MAC addresses are configured on interfaces, multicast packets destined for a multicast MAC address are forwarded only to interfaces configured with this multicast MAC address in a VLAN.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Configure a static multicast MAC address using the following two methods:

    • Configure a static multicast MAC address on an interface:

      1. Run:
        interface interface-type interface-number

        The interface view is displayed.

      2. Run:
        mac-address multicast mac-address vlan vlan-id 

        A multicast MAC address is configured on an interface.

    • Configure a static multicast MAC address on multiple interfaces:

      Run:
      mac-address multicast mac-address interface { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-10> vlan vlan-id
      A static multicast MAC address is configured on multiple interfaces.

      The interface numbers must be consecutive. interface-number2 must be greater than interface-number1.

  3. Run:

    commit

    The configuration is committed.

Checking the Configuration

After the configuration is complete, run the following commands in any view to check configuration of static multicast MAC addresses.

  • Run the display mac-address multicast [ [ mac-address ] vlan vlan-id ] command to check the configured static multicast MAC address entries.
  • Run the display mac-address multicast [ vlan vlan-id ] total-number command to check the number of configured static multicast MAC address entries.
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Updated: 2019-08-09

Document ID: EDOC1000041694

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