Avaya 882 사용자 설명서

Document No. 10-300077, Issue 2

12-83

Configuring IP Routing

ICMP Router Discovery Protocol (IRDP) is an alternative router discovery 
protocol using ICMP messages on multicast links. ICMP uses router 
discovery messages, known as router advertisements and router 
solicitations. 

Each router periodically multicasts a router advertisement from each of its 
multicast interfaces, announcing the IP address of that interface, and other 
router IP addresses. Hosts discover the addresses of their neighbor routers 
by listening for the advertisements. When a host attached to a link starts up, 
it may multicast a router solicitation to ask for immediate advertisements, 
rather than waiting for the next periodic one to arrive. 

If no advertisements arrive, the host re-transmits the solicitation, but does 
not send additional solicitations. Routers that subsequently start up, or were 
not discovered because of packet loss or temporary link partitioning, are 
eventually discovered by reception of their periodic (unsolicited) 
advertisements.

You can enable IRDP on an interface using either the Web Agent or the 
CLI.

To enable IRDP on an interface using the Web Agent:

1.  In the navigation pane, expand the Routing > IP > Configuration 

folders, and then click IRDP. 

The ICMP Router Discovery Protocol Web page is displayed in the 
content pane. See