Fortinet MR1 - Manual (Page 378)

378
Syntax
ip vrrp <1-255> timers advertise <1-255>
ip vrrp <1-255> timers advertise
<1-255> - The range of virtual router ID is 1 to 255.
< 1-255 > - The range of advertisement interval is 1 to 255.
<no> - This command sets the default advertisement value for a virtual router.
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Default Setting
The default value of advertisement interval is 1.
Command Mode
Interface Config