Arp Static Multi-Port - 3Com 8807 Command Reference Manual

810 C 45: ARP C
HAPTER ONFIGURATION

arp static multi-port

C
OMMANDS
Syntax
arp static ip-address mac-address vlan-id multi-port interface-type
interface-number [ vpn-instance vpn-instance-name ] ]
undo arp ip-address multi-port interface-type interface-number [ vpn-instance
vpn-instance-name ]
View
System view
Parameter
ip-address: IP address of the ARP mapping entry.
mac-address: MAC address of the ARP mapping entry, in the format of H-H-H. For
a multiple-outgoing-port ARP entry, this is a multicast MAC address.
vlan-id: ID of the VLAN of the static ARP entry, in the range of 1 to 4094.
interface-type: Port type.
interface-number: Port number.
For details about the above two parameters, refer to the interface command in
port command manual.
vpn-instance-name: The VPN instance name of the VPN which the IP address
belongs to.
Description
Use the arp static multi-port command to add a multicast ARP port. When you
add the first port, the system generates a multicast ARP entry.
Use the undo arp multi-port command to remove a multicast ARP port. When
you remove the last port, the system removes the multicast ARP entry.
The multicast ARP feature allows you to associate a common unicast route to a
Layer 2 multicast group, that is, add multiple outgoing ports for an outgoing ARP
packet so that the packet can be sent to multiple ports. As a result, a static
multicast ARP entry is generated. In brief, a multicast ARP entry is a static ARP
entry with a multicast MAC address, which may correspond to multiple ports.
According to the multi-port keyword in this command, the switch decides that
the port to be added is for a multicast ARP entry. Only one port can be added
every time the command is executed. If the multicast ARP entry does not exist, a
new multicast ARP entry is generated. If the multicast ARP entries exist with the
same egress, the switch will not add a multicast ARP port.
Note that:
You cannot configure multicast ARP for aggregation ports. Otherwise, the
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system will prompt error message.
At present, the outgoing ports in the same multicast ARP entry cannot be in
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different modules.