In fact, VRRP has the preemption enabled by default so we don't need the vrrp 10 preempt command. The default priority is 100 so we don't need to configure it either. But notice that the correct command to configure the virtual IP address for the group is vrrp 10 ip {ipaddress} (not vrrp group 10 ip ...) and this command does not include a subnet mask.