Connectivity Guide

• max-wait — Sets the maximum wait time between two SPF calculations in milliseconds, from 1 to 600000;
default 10000.
Default
• start-time — 1000 milliseconds
• hold-time — 10000 milliseconds
• max-wait — 10000 milliseconds
Command Mode ROUTER-OSPF
Usage Information By default, SPF timers are disabled in an OSPF instance.
Use SPF throttling to delay SPF calculations during periods of network instability. In an OSPF network, a topology
change event triggers an SPF calculation after a start time. When the start timer nishes, a hold time may delay
the next SPF calculation for an additional time. When the hold timer is running:
• Each time a topology change occurs, the SPF calculation delays for double the congured hold time up to
maximum wait time.
• If no topology change occurs, an SPF calculation performs and the hold timer is reset to its congured value.
If you do not specify a start-time, hold-time, or max-wait value, the default values are used. The no version of this
command removes the congured SPF timers and disables SPF throttling in an OSPF instance.
Example
OS10(config)# router ospf 100
OS10(config-router-ospf-100)# timers spf 1200 2300 3400
OS10(config-router-ospf-100)# do show ip ospf
Routing Process ospf 100 with ID 12.1.1.1
Supports only single TOS (TOS0) routes
It is Flooding according to RFC 2328
SPF schedule delay 1200 msecs, Hold time between two SPFs 2300 msecs
Convergence Level 0
Min LSA origination 0 msec, Min LSA arrival 1000 msec
Min LSA hold time 5000 msec, Max LSA wait time 5000 msec
Number of area in this router is 1, normal 1 stub 0 nssa 0
Area (0.0.0.1)
Number of interface in this area is 1
SPF algorithm executed 1 times
Supported Releases 10.4.0E(R1) or later
timers throttle lsa all
Congures the LSA transmit intervals.
Syntax
timers lsa all [start-interval | hold-interval | max-interval]
Parameters
• start-interval — Sets the minimum interval between initial sending and re-sending the same LSA in
milliseconds, from 0 to 600,000.
• hold-interval — Sets the next interval to send the same LSA in milliseconds. This is the time between
sending the same LSA after the start-interval is attempted, from 1 to 600,000.
•
max-interval — Sets the maximum amount of time the system waits before sending the LSA in
milliseconds, from 1 to 600,000.
.
Default
• start-interval — 0 milliseconds
• hold-interval — 5000 milliseconds
566 Layer 3