HI 8320's dont Stack like VSF they will be two independently managed switches but will act as one logical switch from the perspective of the downstream 2930F's .
Here is an example config
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8320-SW01
================================
interface lag 10
no shutdown
no routing
vlan trunk native 1 tag
vlan trunk allowed 10,20,30
lacp mode active
interface lag 20 multi-chassis
no shutdown
no routing
vlan trunk native 1
vlan trunk allowed 10,20
--------------------------------------------
vsx
inter-switch-link lag 10
role primary #This Actually Turns on VSX
keepalive peer 10.1.1.2 source 10.1.1.1 # This line is optional and doesnt have to be a directly connected link between the switches its just an Ip address thats on both switches and is reachable
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interface 1/1/1
no shutdown
lag 20
interface 1/1/2
no shutdown
lag 10
interface 1/1/3
no shutdown
lag 10
================================
8320-SW02
================================
interface lag 10
no shutdown
no routing
vlan trunk native 1 tag
vlan trunk allowed 10,20,30
lacp mode active
interface lag 20 multi-chassis
no shutdown
no routing
vlan trunk native 1
vlan trunk allowed 10,20
lacp mode active
-------------------------------------------
vsx
inter-switch-link lag 10
role secondary
keepalive peer 10.1.1.1 source 10.1.1.2
--------------------------------------------
interface 1/1/1
no shutdown
lag 20
interface 1/1/2
no shutdown
lag 10
interface 1/1/3
no shutdown
lag 10
This Configuration will get the two Devices up in an VSX configuration But the down stream device will not actually see them as the same Logial switch until you take advantage of the Active gateway under a particular Vlan, the active gateway address is similar to a VRRP Virtual IP. This Configuration has to be on both switches as well
========================================
8320-SW01
========================================
interface vlan10
ip address 10.10.10.2/24
active-gateway ip 10.10.10.1 mac 48:00:00:00:10:10
interface vlan20
ip address 10.20.20.2/24
active-gateway ip 10.20.20.1 mac 48:00:00:00:20:20
========================================
8320-SW02
========================================
interface vlan10
ip address 10.10.10.3/24
active-gateway ip 10.10.10.1 mac 48:00:00:00:10:10
interface vlan20
ip address 10.20.20.3/24
active-gateway ip 10.20.20.1 mac 48:00:00:00:20:20
Once this is all set up and configured the down stream 2930F's well see the two swotches as one logical switch but they two independent switches.