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Chapter 2: Virtual Chassis Stacking
100-240VAC~
Resiliency Link
60
Ring Configuration
A virtual stack using x610 switches can comprise up to 8 stack members
connected in a ring topology. Figure 30 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.
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.
RPS INPUT
RPS
12V/21A MAX
READY
WARNING
This unit may have more than one power input. To reduce the risk of
100-240VAC~
electric shock, disconnect both A/C and RPS inputs before servicing
unit.
RPS INPUT
12V/21A MAX
100-240VAC~
Figure 30. VCStack Ring Topology Using x610 Switches
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.
STACKING
AT-StackXG
STACK PORT 2
STACK PORT 1
High Speed Stacking Cables
Model Number AT-StackXG/0.5
(0.5 metres)
AT-StackXG
STACK PORT 1
RPS
READY
High Speed Stacking Cables
Model Number AT-StackXG/0.5
(0.5 metres)
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
AT-StackXG
unit.
RPS INPUT
RPS
12V/21A MAX
READY
High Speed Stacking Cables
Model Number AT-StackXG/0.5
(0.5 meters) as supplied or
Model Number AT-StackXG/1
(1.0 meter)
STACKING
STACK PORT 2
STACKING
STACK PORT 1
STACK PORT 2
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