Allied Telesis X610-24SPS/X User Manual

Page of 128
Chapter 2: Virtual Chassis Stacking
62
Ring Configuration
A virtual stack using x610 switches can comprise up to 8 stack members 
connected in a ring topology. Figure 34 shows a ring comprising 3 stacked 
x610 series switches with AT-StackXG stacking modules installed. 
Because an alternate path is provided between the stack members, this 
topology offers a very resilient configuration.
PO
WER SUPPL
Y
RPS 
READY
RPS INPUT
12V/21A MAX
STACKING
WARNING
This unit may have more than one power input. To reduce the risk of 
electric shock, disconnect both A/C and RPS inputs before servicing 
unit.
100-240VAC~
High Speed Stacking Cables  
Model Number AT-StackXG/0.5 
(0.5 meters) as supplied or 
Model Number AT-StackXG/1 
           (1.0 meter)
  
PO
WER SUPPL
Y
RPS 
READY
RPS INPUT
12V/21A MAX
STACKING
WARNING
This unit may have more than one power input. To reduce the risk of 
electric shock, disconnect both A/C and RPS inputs before servicing 
unit.
100-240VAC~
AT-StackXG
STACK PORT 2
PO
WER SUPPL
Y
RPS 
READY
RPS INPUT
12V/21A MAX
STACKING
WARNING
This unit may have more than one power input. To reduce the risk of 
electric shock, disconnect both A/C and RPS inputs before servicing 
unit.
100-240VAC~
AT-StackXG
STACK PORT 2
AT-StackXG
STACK PORT 1
STACK PORT 1
High Speed Stacking Cables
Model Number AT-StackXG/0.5
               (0.5 metres)  
STACK PORT 1
High Speed Stacking Cables
Model Number AT-StackXG/0.5
               (0.5 metres)  
STACK PORT 2
Figure 34. VCStack Ring Topology Using x610 Switches
Resiliency Link
The purpose of the resiliency link is to provide the stack members with 
status information that enables them to detect whether the stack master is 
still operational after it has suffered either a power-down or software 
lock-up. This enables the other stack members to always re-elect a new 
stack master safely, and to avoid a situation where there are two isolated 
masters both running the same configuration
A resiliency link operates using a designated VLAN running over switch 
port connections between each stack member.
For more information about the stack resiliency link refer to the Stacking 
Introduction
 and Stacking Commands chapters in the AlliedWare Plus
 
Operating System Software Reference from www.alliedtelesis.com.