Brocade Communications Systems Layer 3 Routing Configuration ICX 6650 - Manual (Page 263)

Brocade ICX 6650 Layer 3 Routing Configuration Guide 245
53-1002603-01
OSPF V3 configuration
Configuring the OSPF V3 LSA pacing interval
The Brocade device paces OSPF V3 LSA refreshes by delaying the refreshes for a specified time
interval instead of performing a refresh each time an individual LSA refresh timer expires. The
accumulated LSAs constitute a group, which the Brocade device refreshes and sends out together
in one or more packets.
The pacing interval, which is the interval at which the Brocade device refreshes an accumulated
group of LSAs, is configurable to a range from 10–1800 seconds (30 minutes). The default is 240
seconds (four minutes). Thus, every four minutes, the Brocade device refreshes the group of
accumulated LSAs and sends the group together in the same packets.
The pacing interval is inversely proportional to the number of LSAs the Brocade device is refreshing
and aging. For example, if you have approximately 10,000 LSAs, decreasing the pacing interval
enhances performance. If you have a very small database (40–100 LSAs), increasing the pacing
interval to 10–20 minutes might enhance performance only slightly.
To change the OSPF V3 LSA pacing interval to two minutes (120 seconds), enter the following
command.
Brocade(config)#ipv6 router ospf
Brocade(config-ospf6-router)#timers lsa-group-pacing 120
Syntax: [no] timers lsa-group-pacing seconds
The seconds parameter specifies the number of seconds and can be from 10–1800 (30 minutes).
The default is 240 seconds (four minutes).
To restore the pacing interval to its default value, use the no form of the command.
Modifying exit overflow interval
If a database overflow condition occurs on the Brocade device, the device eliminates the condition
by removing entries that originated on the device. The exit overflow interval allows you to set how
often a device checks to see if the overflow condition has been eliminated. The default value is 0. If
the configured value of the database overflow interval is 0, then the device never leaves the
database overflow condition.
For example, to modify the exit overflow interval to 60 seconds, enter the following command.
Brocade(config-ospf6-router)#database-overflow-interval 60
Syntax: [no] auto-cost reference-bandwidth number
The seconds parameter can be a value from 0–86400 seconds (24 hours).
To reset the exit overflow interval to its system default, enter the no form of this command.
Modifying external link state database limit
By default, the link state database can hold a maximum of 2000 entries for external (type 5) LSAs.
You can change the maximum number of entries from 500–8000. After changing this limit, make
sure to save the running-config file and reload the software. The change does not take effect until
you reload or reboot the software.
For example, to change the maximum number entries from the default of 2000 to 3000, enter the
following command.