Enable sending ICMP destination unreachable messages

About ICMP destination unreachable messages

A device sends ICMP destination unreachable messages by following these rules:

Restrictions and guidelines

If a DHCP-enabled device receives an ICMP echo reply without sending any ICMP echo requests, the device does not send any ICMP protocol unreachable messages to the source. For more information about DHCP, see Layer 3—IP Services Configuration Guide.

Procedure

  1. Enter system view.

    system-view

  2. Enable sending ICMP destination unreachable messages.

  3. ip unreachables enable

    By default, the sending of ICMP destination unreachable messages is disabled.