ip unreachables

To enable the router to send an ICMP unreachable message to the source if the router receives a packet that has an unrecognized protocol or no route to the destination address, use the command ip unreachables in Global Configuration Mode. The no form of this command disables sending ICMP unreachable messages. ICMP provides a mechanism that enables a router or destination host to report an error in data traffic processing to the original source of the packet. This informs the source that the packet is dropped.

ip unreachables

ip unreachables { [vrf } { <vrf-name>] }

no ip unreachables

no ip unreachables { [vrf } { <vrf-name>] }

Parameters

Parameter	Type	Description
`vrf`		Enter for vrf.
<vrf-name>		Enter vrf-name.

Mode

Global Configuration Mode

Default

Sending of ICMP unreachable messages is enabled.

Examples

iS5Comm(config)# ip unreachables vrf default