Disabling ICMP Messages

By default, RUCKUS devices are enabled to respond to broadcast ICMP echo packets or ICMP Unreachable messages.

You can selectively disable the following types of Internet Control Message Protocol (ICMP) messages:

Echo messages (ping messages)

Destination Unreachable messages: You can disable all types of ICMP unreachable messages, or individual types.

Note: Disabling an ICMP Unreachable message type does not change the RUCKUS device ability to forward packets. Disabling ICMP Unreachable messages prevents the device from generating or forwarding the Unreachable messages.

Enter global configuration mode.
```
device# configure terminal
```

Disable the response to broadcast ICMP echo packets (ping requests).
```
device(config)# no ip icmp echo broadcast-request
```

Disable all ICMP Unreachable messages.
```
device(config)# no ip icmp unreachable
```

Disable ICMP Host Unreachable messages.
```
device(config)# no ip icmp unreachable host
```
For more options, refer to the ip icmp unreachable command in the RUCKUS FastIron Command Reference.

IP Addressing

Disabling ICMP Messages