arp-miss message-cache disable

Function

The arp-miss message-cache disable command disables the device from packetizing ARP Miss messages.

The undo arp-miss message-cache disable command enables the device to packetize ARP Miss messages.

By default, the device is enabled to packetize ARP Miss messages.

Only the S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-HI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.

Format

arp-miss message-cache disable

undo arp-miss message-cache disable

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

If a host sends an IP packet with an irresolvable destination IP address to the device (there is a routing entry matching the destination IP address but there is no ARP entry matching the next hop of the routing entry), ARP Miss messages are generated on the device. By default, the device packetizes ARP Miss messages and sends them to the CPU, improving the efficiency in processing ARP Miss messages.

When the device is enabled to packetize ARP Miss messages, the device cannot send ICMP Host Unreachable packets or ICMP Redirect packets. To enable these cards to send ICMP Host Unreachable packets and ICMP Redirect packets, run the arp-miss message-cache disable command to disable the device from packetizing ARP Miss messages.

Example

# Disable the device from packetizing ARP Miss messages.

<HUAWEI> system-view
[HUAWEI] arp-miss message-cache disable