Stacking Information And Topologies - HP 2920 Installation And Getting Started Manual

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Stacking Information and Topologies

The HP 2920 switches support the HP 2920 Stacking Technology feature
for stacking the switches. When HP 2920 Stacking Modules (J9733A) are
installed in the switches, any combination of up to four HP 2920 switches can
be stacked together via high-speed backplane cables to form a single extended
virtual switch. The stacking topologies supported depend on the number of
switches being stacked.
The stacking cables and connections operate independently of any layer 2 or
layer 3 network protocols and features, including Spanning Tree. When
multiple switches are stacked, they behave as a single, virtual switch with
additional network ports being supplied by the stack members.
If an HP 2920 switch is powered on for the first time without a stacking module
installed, stacking will be disabled and that will be saved in the switch's
running configuration. Subsequently, after a stacking module has been
installed, stacking must be enabled through the console (CLI) command
stacking enable.
To set up a stack of HP 2920 switches, you should:
1. Power off all switches that are going to be stacked.
2. Install Stacking Modules in the switches, and connect the stacking cables
to create your stacking topology.
3. Power-on each switch, one at a time. The first switch that you should
power on is the one that you want to be the Commander of the stack. The
second one will become the stack Standby. For the other stack members,
their Member ID is determined by the sequence in which they are booted.
There are additional methods for creating your HP 2920 stack. For
configuration options and other information on stacking, see "Stack
Management" chapter in the Advanced Traffic Management Guide for your
switch.
The supported stacking topologies include the following:
■ Chain
Ring
■
Installing the Switch
Stacking Information and Topologies
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