You can lower these timer settings to speed up the failover or preemption
However, to avoid degradation in performance, do not set the hello timer below 1 second or the hold timer below 4 seconds
The active and standby HSRP routers send hello packets to the HSRP group multicast address every 3 seconds by default
The standby router will become active if it does not receive a hello message from the active router after 10 seconds
Hello
Hello