Configuring IP Unicast Routing Configuring ICMP Router Discovery Protocol Command or Action Purpose Step 4 ip irdp Example: Device(config-if)#ip irdp Enables IRDP processing on the interface. Step 5 ip irdp multicast Example: Device(config-if)#ip irdp multicast (Optional) Sends IRDP advertisements to the multicast address (224.0.0.1) instead of IP broadcasts. Note This command allows for compatibility with Sun Microsystems Solaris, which requires IRDP packets to be sent out as multicasts. Many implementations cannot receive these multicasts; ensure end-host ability before using this command. Step 6 ip irdp holdtime seconds Example:
Device(config-if)#ip irdp holdtime 1000 (Optional) Sets the IRDP period for which advertisements are valid. The default is three times the maxadvertinterval value. It must be greater than maxadvertinterval and cannot be greater than 9000 seconds. If you change the maxadvertinterval value, this value also changes. Step 7 ip irdp maxadvertinterval seconds Example: Device(config-if)#ip irdp maxadvertinterval 650 (Optional) Sets the IRDP maximum interval between advertisements. The default is 600 seconds. Step 8 ip irdp minadvertinterval seconds Example: Device(config-if)#ip irdp minadvertinterval 500 (Optional) Sets the IRDP minimum interval between advertisements.
The default is 0.75 times the maxadvertinterval. If you change the maxadvertinterval, this value changes to the new default (0.75 of maxadvertinterval). Step 9 ip irdp preference number Example: Device(config-if)#ip irdp preference 2 (Optional) Sets a device IRDP preference level. The allowed range is –231 to 231. The default is 0. A higher value increases the router preference level. Step 10 ip irdp address address [number] Example: Device(config-if)#ip irdp address 10.1.10.10 (Optional) Specifies an IRDP address and preference to proxy-advertise. Configuring IP Unicast Routing 21