Enables a Layer 3 device to respond to IPv6 ICMP unreachable messages.
By default, the device does not respond to ICMP unreachable messages.
Interface configuration mode.
Use the no form of the command to disable the feature.
The following example enables a device to respond to ICMP unreachable notifications to the indicated source.
device# configure terminal device(config)# interface ve 2 device(config-int-ve-2)# ip address 200::1/64 device(config-int-ve-2)# ip icmp unreachable