Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 288)

Configure OSPF group Link State Advertisement (LSA) pacing
The device paces 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 device refreshes and sends out together in one or more packets.
The pacing interval, which is the interval at which the 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 device refreshes the group of accumulated LSAs and sends
the group together in the same packets.
Usage guidelines
The pacing interval is inversely proportional to the number of LSAs the 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 slightly.
Changing the LSA pacing interval
To change the LSA pacing interval, use the following CLI method.
To change the LSA pacing interval to two minutes (120 seconds), enter the following command.
device(config-ospf-router)# timers lsa-group-pacing 120
Syntax: [no] timers lsa-group-pacing secs
The secs 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, enter the following command.
device(config-ospf-router)# no timers lsa-group-pacing
Modify OSPF traps generated
OSPF traps as defined by RFC 1850 are supported on device.
You can disable all or specific OSPF trap generation by entering the following CLI command.
device(config)# no snmp-server trap ospf
To later re-enable the trap feature, enter snmp-server trap ospf .
To disable a specific OSPF trap, enter the command as no snmp-server trap ospf ospf-trap.
These commands are at the OSPF router Level of the CLI.
Here is a summary of OSPF traps supported on device, their corresponding CLI commands, and their
associated MIB objects from RFC 1850. The first list are traps enabled by default:
• interface-state-change-trap - [MIB object: OspfIfstateChange]
• virtual-interface-state-change-trap - [MIB object: OspfVirtIfStateChange
• neighbor-state-change-trap - [MIB object:ospfNbrStateChange]
• virtual-neighbor-state-change-trap - [MIB object: ospfVirtNbrStateChange]
• interface-config-error-trap - [MIB object: ospfIfConfigError]
• virtual-interface-config-error-trap - [MIB object: ospfVirtIfConfigError]
Configure OSPF group Link State Advertisement (LSA) pacing
288 FastIron Ethernet Switch Layer 3 Routing Configuration Guide
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