H3C Technologies H3C S12500 Series Switches - Manual (Page 18)

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Step Command Remarks
1. Enter system view. system-view N/A
2. Configure a static ARP
entry.
• Configure a long static ARP entry:
arp static ip-address mac-address [ vlan-id
interface-type interface-number ]
[ vpn-instance vpn-instance-name ]
• Configure a short static ARP entry:
arp static ip-address mac-address
[ vpn-instance vpn-instance-name ]
Use either command.
Configuring a multiport ARP entry
For a multiport ARP entry, the multicast or multiport unicast MAC address entry specifies the VLAN ID and
outbound ports, and the short static ARP entry specifies the VPN and the IP address. A multiport ARP
entry is never overwritten by a dynamic, short static, or long static ARP entry.
Configuration guidelines
When you configure a multiport ARP entry, follow these guidelines:
• The multiport ARP entry does not take effect if the corresponding VLAN interface is not created, is
down, or does not match the specified VPN. Thus, packets matching it are discarded. It takes effect
when the VLAN interface is up and matches the specified VPN.
• The short static ARP entry uses its MAC address to find a matching multicast or multiport unicast
MAC address entry. If the MAC address exists in multiple VLANs, the short static ARP entry uses the
MAC address that has the smallest VLAN ID to generate the multiport ARP entry.
• When multiport ARP entries reach the maximum number, the short static ARP entry and the
matching multicast or multiport unicast MAC address entry cannot generate a multiport ARP entry.
In addition, they cannot automatically generate the multiport ARP entry when any existing multiport
ARP entries are removed. You need to manually configure them again.
• When an Ethernet interface is added to an aggregate group, you can configure the multicast or
multiport unicast MAC address entry only in the aggregate interface view corresponding to the
aggregate group. Otherwise, you cannot configure them.
• A switch can use the MAC address in a multicast or multiport unicast MAC address entry only as the
destination MAC address to send packets through multiple ports. When it receives a packet whose
source MAC address is the one in the multicast or multiport unicast MAC address entry from a
server, the switch discards it.
Configuration procedure
To configure a multiport ARP entry:
Step Command Remarks
1. Enter system view. system-view N/A