System information

Configuring Interfaces and TCP/IP Features
5-23
number is the minimum time between IRDP advertisements, expressed in
seconds; valid entries are 3 to 1800; default is 450.
6. To send IRDP advertisements with Multicast packets, use the ip irdp multicast
command in Interface Configuration mode, as shown below:
MOT(config-if)#ip irdp multicast
The default is IRDP broadcast.
7. To set the IRDP routing preference level, use the ip irdp preference command in
Interface Configuration mode, as shown below:
MOT(config-if)#ip irdp preference <number>
where:
number is the IRDP routing preference level; valid entries are -2147483648
to 2147483647; default is 0.
Enabling ICMP
Once IRDP is enabled, follow the steps in this section to enable ICMP.
1. Use the ip mask-reply command to enable ICMP netmask reply.
MOT(config-if)#ip mask-reply
Use the no ip mask-reply command to disable the function.
2. Use the ip redirects command to enable the sending of IP redirect messages.
MOT(config-if)#ip redirects
Use the no ip redirects command to disable the sending of redirect messages.
3. Use the ip unreachables command to enable the generation of ICMP
unreachable messages, as shown in the example below:
MOT(config-if)#ip unreachables
Use the no ip unreachables command to disable the function.
4. You can send ICMP echo request packets to a specified address. You can set an
optional packet count for a destination. To do this, use the ping command from
Privileged EXEC mode, as shown below: