Specifications

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Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 3 Configuring OSPFv2
Configuring Advanced OSPFv2
DETAILED STEPS
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:
• 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 “Flooding and LSA Group Pacing” section on
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.
At the interface level, you can also control the following timers:
• Retransmit interval—Sets the estimated time between successive LSAs.
• Transmit delay—Sets the estimated time to transmit an LSA to a neighbor.
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
router ospf instance-tag
Example:
switch(config)# router ospf 201
switch(config-router)#
Creates a new OSPFv2 instance with the configured
instance tag.
Step 3
max-metric router-lsa [on-startup
[announce-time] [wait-for bgp tag]]
Example:
switch(config-router)# max-metric
router-lsa
Configures OSPFv2 stub route advertisements.
Step 4
copy running-config startup-config
Example:
switch(config-router)# copy
running-config startup-config
(Optional) Saves this configuration change.