Modifying The Default Timers - Cisco Nexus 3000 Series Configuration Manual

Configuring Advanced OSPFv2
S e n d d o c u m e n t c o m m e n t s t o n e x u s 3 k - d o c f e e d b a c k @ c i s c o . c o m
DETAILED STEPS
Command
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Step 2
router ospf instance-tag
Example:
switch(config)# router ospf 201
switch(config-router)#
Step 3
max-metric router-lsa [on-startup
[ announce-time ] [wait-for bgp tag ]]
Example:
switch(config-router)# max-metric
router-lsa
Step 4
copy running-config startup-config
Example:
switch(config-router)# copy
running-config startup-config
This example shows how to enable the Stub Router Advertisements feature on startup for the default 600
seconds:
switch# configure terminal
switch(config)# router ospf 201
switch(config-router)# max-metric router-lsa on-startup
switch(config-router)# copy running-config startup-config

Modifying the Default Timers

OSPFv2 includes a number of timers that control the behavior of protocol messages and shortest path
first (SPF) calculations. OSPFv2 includes the following optional timer parameters:
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At the interface level, you can also control the following timers:
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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
3-36
LSA arrival time—Sets the minimum interval allowed between LSAs arriving from a neighbor.
LSAs that arrive faster than this time are dropped.
Pacing LSAs—Set the interval at which LSAs are collected into a group and refreshed,
checksummed, or aged. This timer controls how frequently LSA updates occur and optimizes how
many are sent in an LSA update message (see the
page 3-6).
Throttle LSAs—Set rate limits for generating LSAs. This timer controls how frequently an LSA is
generated if no topology change occurs.
Throttle SPF calculation—Controls how frequently the SPF calculation is run.
Retransmit interval—Sets the estimated time between successive LSAs.
Transmit delay—Sets the estimated time to transmit an LSA to a neighbor.
Purpose
Enters configuration mode.
Creates a new OSPFv2 instance with the configured
instance tag.
Configures OSPFv2 stub route advertisements.
(Optional) Saves this configuration change.
"Flooding and LSA Group Pacing" section on
Chapter 3 Configuring OSPFv2