scale-timer
By default, the timer scale is set to 1.
Global configuration mode
Increasing the timer scale value decreases the length of all the VSRP timers equally, without changing the ratio of one timer to another.
To achieve sub-second failover times, you can shorten the duration of all scale timers for VSRP, VRRP, and VRRP-E by adjusting the timer scale. The timer scale is a value used by the software to calculate the timers. If you increase the timer scale, each timer value is divided by the scale value. Using the timer scale to adjust timer values enables you to easily change all the timers while preserving the ratios among their values. For example, if you set the timer scale to 2, all VSRP, VRRP, and VRRP-E timer values will be divided by 2. Here is an example:
Setting the Timer Scale Values
| Timer | Timer scale | Timer value |
|---|---|---|
| Hello interval | 1 | 1 second |
| 2 | 0.5 seconds | |
| Dead interval | 1 | 3 seconds |
| 2 | 1.5 seconds | |
| Backup Hello interval | 1 | 60 seconds |
| 2 | 30 seconds | |
| Hold-down interval | 1 | 3 seconds |
| 2 | 1.5 seconds |