Connecting High-Speed Stacking Cables - Enterasys SecureStack B2 B2G124-48P Hardware Installation Manual

Connecting High-Speed Stacking Cables

3. If you are installing this switch in a stacked configuration, repeat this procedure for
each switch until all switches have been installed in the stack, then proceed to
"Connecting High‐Speed Stacking Cables" on page 3‐10. Otherwise, proceed to
"Connecting AC and PoE Power" on page 3‐14.

Connecting High-Speed Stacking Cables

The stack of switches can be connected in a ring or daisy chain topology. In a ring
topology all the switches are connected. The only difference in the cable connections in a
daisy chain topology is that one cable is not installed.
Up to 8 switches can be stacked together using C2CAB‐SHORT and C2CAB‐LONG
high‐speed stacking cables. You can add switches and reach up to a maximum of 384
Ethernet ports per stack. The high‐speed stacking cables allow the entire stack to operate
with a single IP address.
The high‐speed stacking cables are optional items and must be ordered
separately. The B2G124‐48P and B2H124‐48P support three types of SecureStack
stacking cables:
• C2CAB‐SHORT cable to connect two adjacent switches in the stack. If the
stack is in a configuration where the adjacent switches are too far apart for
the SHORT cables, the LONG cable can be used for the connections.
• C2CAB‐LONG cable to connect from the top switch to the bottom switch in
the stack. You need only one C2CAB‐LONG cable per stack.
• C2CAB‐5M cable to connect from the top switch to the bottom switch in the
stack when these two switches are physically located in seperate mounting
racks and require a longer cable reach.
Figure
DOWN and STACK UP connectors are used in the installation. The high‐speed stacking
cable (1) connections are from the STACK DOWN connector (2) of one switch to the
STACK UP (3) connector of the next switch up in the stack. A high‐speed stacking cable
connection from the STACK DOWN (4) connector of the switch at the top of the stack to
the STACK UP (5) connector at the bottom of the stack completes the ring connection. In a
daisy chain topology, the last cable connection is not made.
3-10 Hardware Installation
3‐9 shows an example of a four‐high stack connected in a ring topology. All STACK