Chapter 2: Virtual Chassis Stacking
64
Trunks of AT-StackQS Cards
If you want to reserve ports S1 and S2 on the x930 Switches for other
network functions or need a faster trunk for the stack, you can build a trunk
with AT-StackQS Cards. They support 40Gbps QSFP+ transceivers in
their two ports. Refer to Figure 15 on page 53. Here are the guidelines for
a trunk of AT-StackQS Cards:
Stacks can have up to eight x930 Switches.
Stacks can have both 28- and 52-port switches.
You must install AT-StackQS Cards in all the switches of the stack.
You must use QSFP+ transceivers from Allied Telesis. Switches
with transceivers from other network equipment providers might
not be able to form the stack. For a list of supported transceivers,
refer to the product’s data sheet on the Allied Telesis web site.
Transceivers are purchased separately.
The two ports on the AT-StackQS Cards are the default trunk
ports. (For switches without AT-StackQS Cards, ports S1 and S2
are the default trunk ports.)
The cables have to crossover to different ports on the cards in the
switches of the stack. Port 1 on the card in one switch has to
crossover to port 2 on the card in the next switch. Additionally, the
ports on the cards in the first and last switches of the stack have to
be connected together to form a loop in the trunk.
To use the ports on AT-StackQS Cards as regular networking
ports, you can disable VCStack or select other ports as the trunk.
The bandwidth of the trunk is 160Gbps.
For instructions, refer to Chapter 12, “Building the Stack with AT-StackQS
Here are examples of stack trunks of AT-StackQS Cards. Figure 21 on
page 65 illustrates a stack of two x930 Switches.
Summary of Contents for AT-x930-28GPX
Page 8: ...Contents 8...
Page 12: ...Tables 12...
Page 16: ...Preface 16...
Page 82: ...Chapter 2 Virtual Chassis Stacking 82...
Page 92: ...Chapter 3 Beginning the Installation 92...
