Master Election; Stack Redundancy; Shortest Path Forwarding - Interlogix IFS NS3601-24P User Manual

(see "Replacing a Switch" above).
5. Deleting a switch will remove any configuration pertaining to it.
6. Deleting an active switch will leave it with an unassigned Switch ID until rebooted or manually assigning a Switch ID.

4.17.1.2 Master Election

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.

4.17.1.3 Stack Redundancy

In the unlikely event that a IFS Switch fails in a stack, stack integrity is maintained if the redundant cable is connected to the stack.
The affected switch within the sack can be replaced or removed without disrupting normal operation. The broken link is bypassed
and data transmission continues uninterrupted. The single management IP address for the stack is also preserved for uninterrupted
management and monitoring.

4.17.1.4 Shortest Path Forwarding

The IFS Swtich supports shortest path forwarding technology to optimal data flow across the stack. The advantage of shortest path
forwarding as below:
Automatic Loop Prevention – Using Time To Live (TTL) information in the stack-header
Utilize all stack links in the ring.
IFS NS3601-24P/4S GE-DSSG-244 and 244-POE User Manual
Figure 4-17-4 Remove or Replace a switch from the stack
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