Specifying An Advertisement Destination Address; Defining The Advertisement Interval; Setting The Maximum Advertisement Interval; Setting The Minimum Advertisement Interval - Alcatel OmniSwitch 6624 Network Configuration Manual

Configuring RDP
It is only necessary to change the above parameter values if the default value is not sufficient. The follow-
ing subsections provide information about how to configure RDP interface parameters if it is necessary to
use a different value.

Specifying an Advertisement Destination Address

Active RDP interfaces transmit advertisement packets at random intervals and in response to ICMP solici-
tation messages received from network hosts. These packets are sent to one of two supported destination
addresses: all systems multicast (224.0.0.1) or broadcast (255.255.255.255).
By default, RDP interfaces are configured to use the 224.0.0.1 as the destination address. To change the
RDP destination address, use the
example, the following command changes the destination address to the broadcast address:
-> ip router-discovery interface 17.255.10.2 advertisement-address broadcast
Enter all-systems-multicast when using this command to change the destination address to 224.0.0.1. For
example:
-> ip router-discovery interface 17.255.10.2 advertisement-address all-systems-multicast

Defining the Advertisement Interval

The advertisement interval represents a range of time, in seconds, in which RDP will transmit advertise-
ment packets at random intervals. This range is defined by configuring a maximum amount of time that
RDP will not exceed before the next transmission and configuring a minimum amount of time that RDP
will observe before sending the next transmission. Both of these values are referred to as the maximum
advertisement interval and the minimum advertisement interval.
Note that when an RDP interface becomes active, it transmits 3 advertisement packets at intervals no
greater than 16 seconds. This facilitates a quick discovery of this router on the network. After these initial
transmissions, advertisements occur at random times within the advertisement interval value or in
response to solicitation messages received from network hosts.

Setting the Maximum Advertisement Interval

To set the maximum amount of time, in seconds, that RDP will allow between advertisements, use the
ip router-discovery interface max-advertisement-interval
command sets this value to 1500 seconds for the 17.255.10.2 router RDP interface:
-> ip router-discovery interface 17.255.10.2 max-advertisement-interval 1500
Make sure that the value specified with this command is greater than the current minimum advertisement
interval value. By default, this value is set to 600 seconds.

Setting the Minimum Advertisement Interval

To set the minimum amount of time, in seconds, that RDP will allow between advertisements, use the
ip router-discovery interface min-advertisement-interval
command sets this value to 500 seconds for the 17.255.10.2. router RDP interface:
-> ip router-discovery interface 17.255.10.2 min-advertisement-interval 500
Make sure that the value specified with this command is less than the current maximum advertisement
interval value. By default, this value is set to 0.75 * default maximum interval value (450 seconds if the
maximum interval is set to its default value of 600 seconds).
OmniSwitch 6624/6648 Network Configuration Guide
ip router-discovery interface advertisement-address
April 2004
Creating an RDP Interface
command. For example, the following
command. For example, the following
command. For
page 14-9