Use this command to configure, the delay for SPF calculation as well as the minimum and maximum
intervals between two SPF calculations after receiving the topology change information for OSPFv3
in the routing process configuration mode. Use the no form of this command to restore the default
setting.
Spf-delay refers to the delay from the topology change to the SPF calculation. Spf-holdtime refers to
the minimum interval between the first and the second SPF calculations. Then, the interval of the
consecutive SPF calculations is at least twice as the last interval till it reaches to spf-max-waittime. If
the interval between two SPF calculations has exceeded the required minimum value, the interval of
SPF calculation will re-start from spf-holdtime.
Smaller spf-delay and spf-holdtime value can make the topology convergence faster. Greater
spf-max-waittime value can reduce the SPF calculations. Those configuration are flexible according
to the actual stability of the network topology.
Compared with the timers spf command, this command is more flexible. It not only speeds up the
SPF convergence calculation, but also reduces the system resources consumption of SPF calculation
as the topology changes continuously. Therefore, the timers throttle spf command is recommended.
The spf-holdtime cannot be smaller than spf-delay, or the spf-holdtime will be set to be equal
to spf-delay;
The spf-max-waitime cannot be smaller than spf-holdtime, or the spf-max-waittime will be set
to be equal to spf-holdtime automatically;
The configuration of the timers spf command and of the timers throttle spf command are