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5-6
Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter Software Configuration Guide
OL-12189-01
Chapter 5 Managing Switch Stacks
Understanding Switch Stacks
Figure 5-3 Adding a Standalone Switch to a Switch Stack
Stack Master Election and Re-Election
The stack master is elected or re-elected based on one of these factors and in the order listed:
1. The switch that is currently the stack master.
2. The switch with the highest stack member priority value.
Note We recommend assigning the highest priority value to the switch that you prefer to be the
stack master. This ensures that the switch is re-elected as stack master if a re-election occurs.
1 Advanced Management Module (AMM)
Note All of the AMMs in the enclosures lose connectivity to the stack members. Only network
administrators can manage the switch.
2 Internal Ethernet management port
Blade switch
Blade switch
Blade switch
Blade switch
1
2
Blade switch
Blade switch
Blade switch
Blade switch
Blade switch
Blade switch
Blade switch
Blade switch
Blade switch
1
2
Enclosure 1
Enclosure 2
Enclosure 1
Enclosure 2
Stack member 2
Stack member 3
Stack member 1
202009
Stack member 1
and stack master
Stack member 1
and stack master
Stack member 2
Stack member 3
Stack member 4