Configuring IRDP
21-6 IPv4 Basic Routing Protocols
Refer to the CLI Reference for your fixed switch platform for details about the commands listed in
the following procedure. All commands are entered in router interface configuration mode.
advertisement holdtime The length of time this advertised address
should be considered valid.
Can be no less than the max advertisement
interval.
three times the maximum
advertisement interval.
(1800 seconds)
preference level The preference value for this advertised
address.
0
advertisement address IP destination address for advertisements. 224.0.0.1
(all-systems multicast address)
Procedure 21-2 Basic IRDP Configuration
Step Task Command(s)
1. Enable IRDP on the interface ip irdp enable
2. Optionally, change the maximum advertisement
interval. Valid values range from 4 to 1800
seconds.
Use the no form of the command to return to the
default value.
ip irdp maxadvertinterval interval
3. Optionally, change the minimum advertisement
interval. Valid values range from 3 to 1800
seconds.
Use the no form of the command to return to the
default value.
ip irdp minadvertinterval interval
4. Optionally, change the valid lifetime of the IP
address in the advertisement. Valid values range
from 0 to 9000 seconds.
Use the no form of the command to return to the
default value.
ip irdp holdtime holdtime
5. Optionally, change the preference level for this
interface. Valid values range from -2147483648
to 2147483648.
Setting preference to the minimum value
indicates that the address should not be used by
neighboring hosts as a default router address.
Use the no form of the command to return to the
default value of 0.
ip irdp preference preference
6. Optionally, change the advertisement address to
255.255.255.255.
The default of 224.0.0.1 should be used if the
router supports IP multicast on the interface.
Use the no form of the command to return to the
default value.
ip irdp broadcast
7. Display IRDP information. show ip irdp [vlan vlan-id]
Table 21-3 IRDP Default Values (continued)
Parameter Description Default Value
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