Brocade Virtual ADX Switch and Router Guide (Supporting ADX v03.1.00) - Manual (Page 181)

Brocade Virtual ADX Switch and Router Guide 167
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Enabling OSPFv3
7
Configuring the OSPFv3 LSA pacing interval
The Brocade device paces OSPFv3 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, can be configured in a range from 10 through 1800 seconds (30 minutes). The
default is 240 seconds (4 minutes). Thus, every 4 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 through 100 LSAs), increasing the
pacing interval to 10 through 20 minutes might enhance performance only slightly.
To change the OSPFv3 LSA pacing interval to two minutes (120 seconds), enter the following
command:
Virtual ADX(config)# ipv6 router ospf
Virtual ADX(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 through 1800 (30
minutes). The default is 240 seconds (4 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 Virtual ADX 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:
Virtual ADX(config-ospf6-router)# database-overflow-interval 60
Syntax: [no] database-overflow-interval number
The number parameter can be a value from 0 through 60 seconds.
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 through8000. 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.