Stack Trunks - Allied Telesis AlliedWare Plus Installation Manual

Stack Trunks

The switches in a stack are connected by a trunk that consists of two or
more ports on each device. The x930 Switches support the following four
types of trunks:
"Trunks of Ports S1 and S2" on page 60

"Trunks of AT-StackQS Cards" on page 64

"Trunks of Copper 10/100/1000Mbps Ports" on page 67

"Trunks of SFP Ports on AT-x930-28GSTX Switches" on page 69

The front-panel ports S1 and S2 are the default trunk ports, except if the
switches contain AT-StackQS Cards, in which case their ports are the
default trunk ports.
x930 Series Installation Guide for Virtual Chassis Stacking
59