Brocade TurboIron 24X Series Configuration Guide - Manual (Page 916)

882 Brocade TurboIron 24X Series Configuration Guide
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Configuring additional VRRP and VRRPE parameters
To disable preemption on a Backup, enter commands such as the following.
Router1(config)#inter e 6
Router1(config-if-6)#ip vrrp vrid 1
Router1(config-if-6-vrid-1)#non-preempt-mode
Syntax: non-preempt-mode
The syntax is the same for VRRP and VRRPE.
Changing the timer scale
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. By default, the scale value is 1. If you increase the timer scale, each timer’s
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. Here is an example.
If you configure the device to receive its timer values from the Master, the Backup also receives the
timer scale value from the Master.
NOTE
The Backups always use the value of the timer scale received from the Master, regardless of whether
the timer values that are saved in the configuration are the values configured on the Backup or the
values received from the Master.
To change the timer scale, enter a command such as the following at the global CONFIG level of the
CLI.
TurboIron(config)#scale-timer 2
This command changes the scale to 2. All VSRP, VRRP, and VRRP-E timer values will be divided by
2.
Syntax: [no] scale-timer
The parameter specifies the multiplier. You can specify a timer scale from 1 – 10.
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 2 seconds
2 1 second