OSPF Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

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OSPF Configuration Guide for Cisco 8000 Series Routers, Cisco IOS XR Releases

Configure OSPF link-state advertisement frequency

Updated: June 26, 2026

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Configure OSPF link-state advertisement frequency to optimize route convergence and control LSA flooding intervals.

Tune LSA frequency as part of OSPF deployment, especially in large or dynamic networks, to balance responsiveness with resource usage.

Perform this task to optimize OSPF or OSPFv3 route convergence by adjusting how frequently LSAs are generated and flooded, improving routing stability and efficiency.

Before you begin

  • Identify the OSPF process and relevant interfaces.

  • Complete OSPF addressing, routing policy, and interface planning.

  • Ensure you have configuration privileges.

Follow these steps to configure and verify OSPF areas and neighbours:

Procedure

  1. Enter global configuration mode.

    Example:

    Router# configure

  2. Access OSPF or OSPFv3 router configuration mode.

    Example:

    
Router(config)# router ospf 1
Router(config)# router ospfv3 1

  3. Set the router ID (if required).

    Example:

    Router(config-ospf)# router-id 192.168.4.3

  4. Adjust OSPF LSA timers for desired frequency and flooding behavior.

    Example:

    
Router(config-ospf)# timers lsa refresh 1800
Router(config-ospf)# timers lsa min-arrival 2
Router(config-ospf)# timers lsa group-pacing 1000

  5. Commit the configuration and exit.

    Example:

    
Router(config-ospf)# commit
Router(config-ospf)# end

The router now uses optimized LSA frequency settings for efficient, stable routing table updates.