Juniper EX4550 with Equallogic 6210 and virtual Chassis

# set protocols rstp bridge-priority (place your bpdu here)

# set protocols rstp interface ae10 edge

#set interface ae10 mtu 9216

#set interface ae10 aggregated-ether-options flow-control

or

#set interface ae10 aggregated-ether-options no-flow-control

Depending on your needs. Flow control is either on or off , that's it.

for VC

# set chassis redundancy gracefule-switchover

# set virtual-chassis no-split detection (when you have 2 ex4550's if you have more not necessary)

# set virtual-chassis preprovisioned

Now you must specify yoru ex4550's member position with their serial:

from edit

# run show chassis hardware

Hardware inventory:

Item Version Part number Serial number Description

Chassis LX0212521641 Virtual Chassis

Routing Engine 0 REV 12 750-045402 LX1234567801 EX4550-32F

Routing Engine 1 REV 11 750-045402 LX1234567899...