Brocade BigIron RX Series Configuration Guide - Manual (Page 295)

BigIron RX Series Configuration Guide 217
53-1002484-04
Configuring forwarding parameters
7
BigIron RX(config)# ip irdp
This command enables IRDP on the IP interfaces on all ports. Each port uses the default values for
the IRDP parameters. The parameters are not configurable when IRDP is globally enabled.
Enabling IRDP on an individual port
To enable IRDP on an individual interface and change IRDP parameters, enter commands such as
the following.
BigIron RX(config)# interface ethernet 1/3
BigIron RX(config-if-e10000-1/3)# 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 device uses to send Router
Advertisement.
• broadcast – The device sends Router Advertisement as IP broadcasts. This is the default.
• multicast – The device 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 device should consider the advertisement to be valid. When a host
receives a new Router Advertisement message from the device, the host resets the hold time for
the device 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 device 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 device 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 the device. 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.