Master Switch Election In A Stack - KTI Networks KGS-2423 Installation Manual

3.1.3 Master Switch Election in a Stack

Within a managed stack, one master switch (or just "master") must be elected. Any switch not being master is a
slave switch (or just "slave").
To elect a master, the following criteria are evaluated sequentially:
1. If any switch already claims to have been master for more than 30 seconds, then that switch will become
master.
2. If multiple switches claim to have been master for more than 30 seconds, then the switch which has been
master for the longest period of time will become master.
3. The switch with the smallest master priority.
4. The switch with the smallest MAC address.
The above algorithm ensures that once a master has been elected and has been master for more than 30 seconds,
it will remain master. However in some cases the user may want to enforce a new master election. This is done
by clicking "Start Master Election", followed by "Save". This causes the first two criteria to be ignored,
thereby basing master election only on master priority and MAC address. When master election is enforced, the
first two criteria are ignored for a period of 10-15 seconds. On the Stack State Monitor web page, this is shown
by "Reelect" being set to "Yes" for one of the switches in the stack.
Select[Monitor] -> [Stack] to monitor the stack status
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