Configuring a multiport ARP entry

A multiport ARP entry contains an IP address, MAC address, and VLAN ID. The VLAN and output interfaces are specified by a multiport unicast MAC address entry or a multicast MAC address entry.

A multiport ARP entry can overwrite a dynamic, short static or long static ARP entry. Conversely, a short static or long static ARP entry can overwrite a multiport ARP entry.

For a multiport ARP entry to be effective for packet forwarding, make sure the following conditions are met:

• A multiport unicast MAC address entry or a multicast MAC address entry exists.

• The IP address in the multiport ARP entry must reside on the same subnet as the VLAN interface of the specified VLAN.

1. Enter system view.

   system-view

2. Configure a multiport unicast MAC address entry or a multicast MAC address entry.

   • Configure a multiport unicast MAC address entry.

     mac-address multiport mac-address interface interface-list vlan vlan-id

     For more information about multiport unicast MAC address entries, see the mac-address command in Layer 2—LAN Switching Command Reference.

   • Configure a multicast MAC address entry.

     mac-address multicast mac-address interface interface-list vlan vlan-id

     For more information about multicast MAC address entries, see the mac-address multicast command in IGMP snooping commands in IP Multicast Command Reference.

3. Configure a multiport ARP entry.

   arp multiport ip-address mac-address vlan-id [ vpn-instance vpn-instance-name ]

   The specified MAC address and VLAN ID must be the same as those in the multiport unicast MAC address entry or the multicast MAC address entry.