Stacking Methods And Summit Switches - Extreme Networks Summit X150 Series Hardware Installation Manual

About Redundancy
When your stack is operational, one switch is the primary (or master) switch that is responsible for
running network protocols and managing the stack
To provide recovery in case of a break in the stack connections, you can configure redundancy by
designating a backup switch to take over as master if the master switch fails. When you perform the
initial software configuration of the stack, the "easy setup" configuration option automatically
configures redundancy, with slot 1 as the master and slot 2 as the backup. You can also configure
additional switches as "master-capable" to become a stack master in case the initial backup switch fails.
In a stack that combines Summit X460, X480, or X670 series switches with other Summit switch
models, a Summit X460, X480, or X670 series switch might provide more memory and more features
than other Summit switch models in the stack. These differences can affect master node selection,
backup node selection, and failover operation.
Note
The master and backup roles should be assigned to switches from the same series. For
example, if the master node is a Summit X480 series switch, the backup node should also be
a Summit X480 switch. Similarly, if the master node is a Summit X670 series switch, the
backup node should also be a Summit X670 switch.
The choice of which switches should be the master and backup switches is based on a combination of
the feature scalability of each switch, along with the switch speed. The easy setup configuration
process selects the master and backup switches, based on capability and speed, in the following order:
1 Summit X770, X670, or X480 series
2 Summit X460 series
3 Summit X440 series
In comparing two switches in the same capability, the lower slot number takes precedence.
You should follow the same ranking hierarchy when you plan the physical placement of the switches in
the stack.

Stacking Methods and Summit Switches

Each series of Summit switches can use more than one method of stacking.
The following tables shows the stacking methods available for each switch series, listed by stacking
method and by switch series.
Summit Family Hardware Installation Guide
Building Stacks
169