Configuring Irdp; Enabling Irdp On An Interface - Avaya Cajun P882 User Manual

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Configuring IRDP

Using the Web

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

To enable IRDP on an interface using the Web Agent:

1. Select IRDP from the Routing > IP > Configuration group

on the Web Agent window. The ICMP Router Discovery

Protocol dialog box opens (Figure 9-42).

Figure 9-42. ICMP Router Discovery Protocol Dialog Box

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