Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 337)

• Intra-area routes
• Inter-area routes
• External routes
The default for all of these OSPFv3 route types is 110.
NOTE
This feature does not influence the choice of routes within OSPFv3. For example, an OSPF intra-area
route is always preferred over an OSPF inter-area route, even if the intra-area route’s distance is
greater than the inter-area route’s distance.
For example, to change the default administrative distances for intra-area routes to 80, inter-area routes
to 90, and external routes to 100, enter the following commands.
device(config-ospf6-router)# distance intra-area 80
device(config-ospf6-router)# distance inter-area 90
device(config-ospf6-router)# distance external 100
Syntax: [no] distance {external | inter-area | intra-area} distance
The external, inter-area, and intra-area keywords specify the route type for which you are changing
the default administrative distance.
The distance parameter specifies the new distance for the specified route type. You can specify a value
from 1 through 255.
To reset the administrative distance of a route type to its system default, enter the no form of this
command.
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’s refresh timer expires. The
accumulated LSAs constitute a group, which the 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 through 1800 seconds (30 minutes). The default is 240
seconds (four minutes). Thus, every four minutes, the 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 OSPFv3 LSA pacing interval to two minutes (120 seconds), enter the following
command.
device(config)# ipv6 router ospf
device(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 (four minutes).
To restore the pacing interval to its default value, use the no form of the command.
Configuring the OSPFv3 LSA pacing interval
FastIron Ethernet Switch Layer 3 Routing Configuration Guide 337
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