Configuring OSPF

The pacing interval, which is the interval at which the routing 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 routing switch refreshes the group of accumulated LSAs and sends the group together in the same packet(s).

Usage Guidelines

The pacing interval is inversely proportional to the number of LSAs the routing 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, use the following CLI method.

USING THE CLI

To change the LSA pacing interval to two minutes (120 seconds), enter the following command:

HP9300(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:

HP9300(config-ospf-router)# no timers lsa-group-pacing

USING THE WEB MANAGEMENT INTERFACE

You cannot configure this option using the Web management interface.

Modify OSPF Traps Generated

OSPF traps as defined by RFC 1850 are supported on HP routing switches. OSPF trap generation is enabled on the routing switch, by default.

USING THE CLI

When using the CLI, you can disable all or specific OSPF trap generation by entering the following CLI command:

HP9300(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 HP routing switches, 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]

•

virtual-neighbor-state-change-trap

[MIB object: ospfVirtNbrStateChange]

•

interface-config-error-trap

[MIB object: ospfIfConfigError]

•

virtual-interface-config-error-trap

[MIB object: ospfVirtIfConfigError]

•

interface-authentication-failure-trap

[MIB object: ospfIfAuthFailure]

•

virtual-interface-authentication-failure-trap

[MIB object: ospfVirtIfAuthFailure]

•

interface-receive-bad-packet-trap

[MIB object: ospfIfrxBadPacket]

8 - 35