AT-DC2552XS / L3 Enterprise Core Switch Installation Guide
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The master is the switch with the lowest priority setting, or if the priority
settings are equal, the switch with the lowest MAC address will become
the stack master. When a stack member is initially booted, its priority value
defaults to 128. Therefore, if both switches retain their defaults, then the
stack master will be determined by MAC address comparison.
The stack also assigns a stack ID number to each member. This number
provides a unique reference number for switches within the stack; it plays
no part in selecting the stack master. The stack ID is used as the first digit
of the three component port identifier numbers. For example, port number
2.0.14 has the stack ID of 2.
Note
The stack ID number assignment is important to remember when
using configuration scripts. You should ensure that you modify your
configuration scripts to match any changes you have made to the
stack ID assignments.
Note
The ability to independently set both a stack member’s priority and
its ID means that the stack master does not need to have an ID of 1;
although configuration is simplified by arranging for ID 1 to be the
device with the lowest priority value - and thereby forcing it to be the
stack master. If you create a stack using new switches, the following
(simplified) process should ensure that the master member has an
ID of 1.
Note
New switches are shipped with a Stack Member ID of 1 and a
priority of 128. If two such switches are created as a stack, the
switch with the lowest MAC address will be selected to be the stack
master (because all priority settings are 128). The remaining stack
member device will then reboot. The stack master does not reboot
and retains its Stack Member ID of 1.
You can change the stack ID by using the command stack renumber.
Common Stack Configuration
Once the switches have configured themselves into a VCStack, they all
share the same configuration information and startup scripts.
Summary of Contents for AT-DC2552XS
Page 1: ...613 002097 Rev A AT DC2552XS L3 ENTERPRISE CORE SWITCH Installation Guide...
Page 8: ...Figures 8...
Page 10: ...Tables 10...
Page 14: ...Preface 14...
Page 34: ...Chapter 1 Overview 34...
Page 44: ...Chapter 2 VCStack Overview 44...
Page 86: ...Chapter 7 Managing the Switch 86...
Page 90: ...Chapter 8 Troubleshooting 90...
