Cisco IOS in a Nutshell, 2nd Edition

Name

ip irdp — interface

Synopsis

ip irdp [multicast | holdtime seconds | maxadvertinterval seconds |
minadvertinterval seconds | preference value | address ip-address
[preference]]
no ip irdp

Configures

IRDP

Default

Disabled

Description

This command enables ICMP Router Discovery Protocol (IRDP) on an interface. Other hosts on the network can use this protocol to negotiate a default router based on the preference parameter.

This command has many options. Instead of writing a single long command, it’s often more convenient to issue a number of shorter commands, each setting one option.

multicast

Optional. Tells the router to use the multicast address instead of the broadcast address for IRDP.

holdtime seconds

Optional. The time in seconds that advertisements are held. By default, this value is three times the maxadvertinterval.

maxadvertinterval seconds

Optional. Sets the maximum interval in seconds between advertisements. The default is 600 seconds.

minadvertinterval seconds

Optional. Sets the minimum interval in seconds between advertisements. The default is the maximum interval.

preference value

Optional. Sets the preference value for this router, which is used by the routers running IRDP to select the default gateway. The default preference is 0. The higher the preference, the more preferred this router is to hosts.

address ip-address [ preference ]

Optional. Tells the router to generate proxy advertisements for the given ip-address. If you specify a preference, it is associated with ...