Foundry Networks Switch and Router Installation And Configuration Manual page 509

USING THE WEB MANAGEMENT INTERFACE
1. Log on to the device using a valid user name and password for read-write access. The System configuration
panel is displayed.
2. Click on the plus sign next to Configure in the tree view to display the list of configuration options.
3. Click on the plus sign next to IP to display the list of IP configuration options.
4. Select the General link to display the IP configuration panel.
5. Select Enable next to IRDP.
6. Click the Apply button to save the change to the device's running-config.
7. Select the Save link at the bottom of the dialog. Select Yes when prompted to save the configuration change
to the startup-config file on the device's flash memory.
Enabling IRDP on an Individual Port
To enable IRDP on an individual port and configure IRDP parameters, use either of the following methods.
USING THE CLI
To enable IRDP on an individual interface and change IRDP parameters, enter commands such as the following:
BigIron(config)# interface ethernet 1/3
BigIron(config-if-1/3)# ip irdp maxadvertinterval 400
This example shows how to enable IRDP on a specific port and change the maximum advertisement interval for
Router Advertisement messages to 400 seconds.
NOTE: To enable IRDP on individual ports, you must leave the feature globally disabled.
Syntax: [no] ip irdp [broadcast | multicast] [holdtime <seconds>] [maxadvertinterval <seconds>]
[minadvertinterval <seconds>] [preference <number>]
The broadcast | multicast parameter specifies the packet type the Layer 3 Switch uses to send Router
Advertisement.
• broadcast – The Layer 3 Switch sends Router Advertisement as IP broadcasts. This is the default.
• multicast – The Layer 3 Switch sends Router Advertisement as multicast packets addressed to IP multicast
group 224.0.0.1.
The holdtime <seconds> parameter specifies how long a host that receives a Router Advertisement from the
Layer 3 Switch should consider the advertisement to be valid. When a host receives a new Router Advertisement
message from the Layer 3 Switch, the host resets the hold time for the Layer 3 Switch to the hold time specified in
the new advertisement. If the hold time of an advertisement expires, the host discards the advertisement,
concluding that the router interface that sent the advertisement is no longer available. The value must be greater
than the value of the maxadvertinterval parameter and cannot be greater than 9000. The default is three times
the value of the maxadvertinterval parameter.
The maxadvertinterval parameter specifies the maximum amount of time the Layer 3 Switch waits between
sending Router Advertisements. You can specify a value from 1 to the current value of the holdtime parameter.
The default is 600 seconds.
The minadvertinterval parameter specifies the minimum amount of time the Layer 3 Switch can wait between
sending Router Advertisements. The default is three-fourths (0.75) the value of the maxadvertinterval
parameter. If you change the maxadvertinterval parameter, the software automatically adjusts the
minadvertinterval parameter to be three-fourths the new value of the maxadvertinterval parameter. If you want
to override the automatically configured value, you can specify an interval from 1 to the current value of the
maxadvertinterval parameter.
The preference <number> parameter specifies the IRDP preference level of this Layer 3 Switch. If a host
receives Router Advertisements from multiple routers, the host selects the router interface that sent the message
with the highest interval as the host's default gateway. The valid range is -4294967296 to 4294967295. The
default is 0.
December 2000
Configuring IP
15 - 67