About Securestack C2 Switch Operation In A Stack - Enterasys SecureStack C2 C2G170-24 Hardware Installation Manual

About SecureStack C2 Switch Operation in a Stack

The SecureStack C2 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 SecureStack 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 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 High‐Speed
Stacking Cables" on page 3‐11, 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 inband
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 3‐17.
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: ge.4.12 is the 12th Gigabit Ethernet port on switch # 4).
3. The management election process uses the following precedence to assign a
management device:
a. Previously assigned / elected management switch
b. Management assigned priority (values 1‐15)
c. Hardware preference level
d. Highest MAC Address
Configuring Switches in a Stack
SecureStack C2 Installation Guide 3-13