Hi Car,
Depends on which priority we are talking about. You can make priority in VSS (Virtual Switching System) mechanism or in some FHRP protocol (HSRP, GLBP, VRRP) which are both available in your case.
In VSS you can set up on this way:
switch virtual domain 100
switch mode virtual
switch 1 priority 110
switch 2 priority 105
switch 1 preempt
In FHRP protocol, you can set up on one device like this:
interface Vlan2
ip address x.x.x.2 x.x.x.x
glbp 2 ip x.x.x.1
glbp 2 timers 1 5
glbp 2 priority 120
glbp 2 preempt delay minimum 3
glbp 2 weighting 100 lower 90 upper 95
glbp 2 name VLAN2
And on another device like this:
interface Vlan2
ip address x.x.x.3 x.x.x.x
glbp 2 ip x.x.x.1
glbp 2 timers 1 5
glbp 2 priority 110
glbp 2 preempt delay minimum 3
glbp 2 weighting 100 lower 90 upper 95
glbp 2 name VLAN2
Have in mind which switch you are going to turn on first, so the one who first booted up it will take master role.
I hope that I gave you answer that are you looking for.
cheers
