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Enabling MAC Address Triggered ARP Entry Update
On the Ethernet, MAC address entries are used to guide Layer 2 data forwarding. The ARP entries that define the mapping between IP addresses and MAC addresses guide communication between devices on different network segments.
The outbound interface in a MAC address entry is updated by packets, whereas the outbound interface in an ARP entry is updated after the aging time is reached. In this case, the outbound interfaces in the MAC address entry and ARP entry may be different. To address this issue, run the mac-address update arp command to enable the switch to update outbound interfaces in ARP entries when outbound interfaces in MAC address entries change.
# Enable the MAC address triggered ARP entry update function.
<HUAWEI> system-view [HUAWEI] mac-address update arp