Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 2117)

VCStack Introduction
Software Reference for x310 Series Switches
C613-50046-01 REV A AlliedWare Plus TM Operating System - Version 5.4.4C 82.3
Stacking connectivity and functionality varies slightly between switch types. Your x310
Series switch can support a maximum of four devices per stack. Consult the appropriate
software reference for stacking functionality on other Allied Telesis switches.
The Physical Stack
A VCStack can consist of up to four individual stack members interconnected via high-
speed stacking links (SFP+ ports 27 and 28). As the stack forms, its switch members elect
one of them to become the primary stack member called the stack master (displayed in
the show commands as the active master). The remaining switches then become ordinary
members of the stack, and are referred to as backup members.
VCStack cables, and connections
Stack members are interconnected via the SFP+ ports shown in Figure 82-1 . Note that
stacking cables should connect from port SFP/51 on one stack member, to port SFP/52 on
the other (or from port SFP/27 on one stack member, to port SFP/28 on the other)
Stack members are interconnected via the SFP+ ports shown in Figure 82-1 . Note that
stacking cables should connect from port S1/27 on one stack member, to port S2/28 on
the other.
Figure 82-1: Stacking Ports
Two Switch Stack Configuration
Ring configuration
This configuration, shown in Figure 82-2 , uses two switches that are connected back to
back via two high-speed stacking links. Note that stacking ports labeled S1/27 must
connect to stacking ports labeled S2/28. Although in this configuration the stack can still
function using only a single high-speed stacking link, we recommend using both stacking
links as shown.
x310 Stacking-Ports.eps
CLASS 1 LASER PRODUCT
CONSOLE
S1/51
S2/52
49 SFP+
50
x510-52GTX
3 5 1 7 9
4 6 8 10 2
Stacking
Ports