Router Discovery Protocol Commands 1235
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Router Discovery Protocol
Commands
Routers can be configured to periodically send router discovery messages to
announce their presence to locally attached hosts. The router discovery
message advertises one or more IP addresses on the router that hosts can use
as their default gateway. Hosts can send a router solicitation message asking
any router that receives the message to immediately send a router
advertisement, so that the host does not have to wait for the next periodic
message.
Router discovery enables hosts to select from among multiple default
gateways and switch to a different default gateway if an initially designated
gateway goes down.
Commands in this Chapter
This chapter explains the following commands:

ip irdp

Use the ip irdp command in Interface Configuration mode to enable Router
Discovery on an interface. Use the no form of t he comm and to di sable R outer
Discovery.
Syntax
ip irdp [multicast | holdtime seconds | maxadvertinterval seconds |
minadvertinterval seconds | preference number | address address]
no ip irdp holdtime
ip irdp ip irdp minadvertinterval
ip irdp address ip irdp multicast
ip irdp holdtime ip irdp preference
ip irdp maxadvertinterval show ip irdp
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