Reference Guide

Configuring LSA Throttling Timers
Configured LSA timers replace the standard transmit and acceptance times for LSAs.
The LSA throttling timers are configured in milliseconds, with the interval time increasing exponentially
until a maximum time has been reached. If the maximum time is reached, the system continues to
transmit at the max-interval. If the system is stable for twice the maximum interval time, the system
reverts to the start-interval timer and the cycle begins again.
1. Specify the interval times for all LSA transmissions.
CONFIG-ROUTEROSPF- id mode
timers throttle lsa all {start-interval | hold-interval | max-interval}
• start-interval: set the minimum interval between the initial sending and resending the same
LSA. The range is from 0 to 600,000 milliseconds.
• hold-interval: set the next interval to send the same LSA. This interval is the time between
sending the same LSA after the start-interval has been attempted. The range is from 1 to 600,000
milliseconds.
• max-interval: set the maximum amount of time the system waits before sending the LSA. The
range is from 1 to 600,000 milliseconds.
2. Specify the interval for LSA acceptance.
CONFIG-ROUTEROSPF- id mode
timers throttle lsa arrival arrival-time
• arrival-time: set the interval between receiving the same LSA repeatedly, to allow sufficient
time for the system to accept the LSA. The range is from 0 to 600,000 milliseconds.
Enabling Passive Interfaces
A passive interface is one that does not send or receive routing information.
Enabling passive interface suppresses routing updates on an interface. Although the passive interface
does not send or receive routing updates, the network on that interface is still included in OSPF updates
sent via other interfaces.
To suppress the interface’s participation on an OSPF interface, use the following command. This
command stops the router from sending updates on that interface.
• Specify whether all or some of the interfaces are passive.
CONFIG-ROUTEROSPF- id mode
passive-interface {default | interface}
The default is enabled passive interfaces on ALL interfaces in the OSPF process.
Entering the physical interface type, slot, and number enables passive interface on only the identified
interface.
– For a Gigabit Ethernet interface, enter the keyword GigabitEthernet then the slot/port
information (for example,
passive-interface gi 2/1).
– For a port channel, enter the keywords port-channel then a number from 1 to 255.
– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port
information (for example, passive-interface ten 2/3).
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Open Shortest Path First (OSPFv2)