Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 693
53-1002269-02
Configuring OSPF
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Configure OSPF group Link State Advertisement
(LSA) pacing
The Layer 3 Switch 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 Layer 3 Switch refreshes and sends out together
in one or more packets.
The pacing interval, which is the interval at which the Layer 3 Switch 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 Layer 3 Switch 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 Layer 3 Switch 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 to two minutes (120 seconds), enter the following command.
PowerConnect(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.
PowerConnect(config-ospf-router)# no timers lsa-group-pacing
Modify OSPF traps generated
OSPF traps as defined by RFC 1850 are supported on routers. OSPF trap generation is enabled on
the router, by default.
When using the CLI, you can disable all or specific OSPF trap generation by entering the following
CLI command.
PowerConnect(config-ospf-router)# 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 routers, their corresponding CLI commands, and
their associated MIB objects from RFC 1850:
• interface-state-change-trap – [MIB object: OspfIfstateChange]
• virtual-interface-state-change-trap – [MIB object: OspfVirtIfStateChange
• neighbor-state-change-trap – [MIB object:ospfNbrStateChange]