Enterasys Networks C2K122-24 - Manual (Page 39)

Connecting High-Speed Stacking Cables
SecureStack C2 Installation Guide 3-9
Figure 3-5 Fastening the Switch to the Rack
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 3‐9. Otherwise, proceed to
“ Connecting AC and RPS Power ” on page 3‐13.
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 and connected by 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.
Figure 3‐6 shows an example of a four‐high stack connected in a ring topology. All STACK
DOWN and STACK UP connectors are used in the installation. The high‐speed stacking
cable connections are from the STACK DOWN connector of one switch to the STACK UP
connector of the next switch up in the stack. A high‐speed stacking cable connection from
the STACK DOWN connector of the switch at the top of the stack to the STACK UP
connector at the bottom of the stack completes the ring connection. In a daisy chain
topology, one cable is not used.
1 Rails of 19-inch rack 2 Mounting screws (supplied by user)
Console
1
2
23
24
25 26
CPU
UP RPS
MGR
DOWN
13
14
11
12
25 26 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 C2K122-24
TX RX TX RX
А
Б
Б
А
Note: The high-speed stacking cables are optional items and must be ordered separately.
There are two types of cables:
• C2CAB-SHORT cable (30.6 cm (12 in) long) to connect two adjacent switches in the
stack.
• C2CAB-LONG cable (1.0 m (36.2 in) long) to connect from the top switch to the bottom
switch in the stack. You only need one C2CAB-LONG cable per stack.
If the stack is in a configuration where the adjacent switches are too far apart for C2CAB-
SHORT cables, C2CAB-LONG cables can be used for the connections.