Enterasys Networks Enterasys SecureStack A2 A2H124-48P - Manual (Page 39)

Configuring Switches in a Stack
SecureStack A2 PoE Installation Guide 3-9
Configuring Switches in a Stack
The information in the following sections is important to understand A2 switch operation
and installations in a stack installation.
About SecureStack A2 Switch Operation in a Stack
The SecureStack A2 products are stackable switches that can be adapted and scaled to
help meet your network needs. These switches provide a management platform and
uplink to a network backbone for a stacked group of up to eight A2 switches.
Once installed in a stack, the switches behave and perform as a single switch. As such,
you can start with a single switch and add more switches as your network expands. You
can also mix different products in the same family in a single stack to provide a desired
combination of port types and functions to match the requirements of individual
applications. In all cases, a stack of switches performs as one large product, and is
managed as a single network entity.
When switches are installed and connected as described back in “ Connecting Stacking
Cables ” on page 3‐7, the following occurs during initialization:
• The switch that will manage the stack is automatically established and is referred to as
the Manager switch.
• All other switches are established as Member switches in the stack.
• The hierarchy of the switches that will assume the function of backup manager is also
determined in case the current manager malfunctions, is powered down, or is
disconnected from the stack.
• The Console port on the manager switch remains active for out‐of‐band (local) switch
management, but the Console port on each member switch is deactivated. This
enables you to set the IP address and system password using a single Console port.
Now each switch can be configured locally using only the manager’s Console port, or
in‐band using a remote device and the CLI set of commands described in this section.
For procedures used for various types of connections to the Console port, refer to
“
Connecting to Console Port for Local Management ” on page 3‐14.
Once a stack is created (more than one switch is interconnected), the following occurs:
1. Switch (unit) IDs are arbitrarily assigned on a first‐come, first‐served basis.
2. Switch IDs are saved against each module. Then, every time a board is power‐cycled,
it will initialize with the same switch ID. This is important for port‐specific
information (for example: fe.4.12 is the 12th Fast Ethernet port on switch number 4).