3Com SuperStack 3 Switch 4400 Series User Manual

Stacking Units 29
Rules For Stacking
Units
This information is also provided in the user documentation that
accompanies the Cascade Kits.
■ The number of Switch units in a stack is limited to a maximum of 192
front panel ports in the stack.
■ Only one Cascade Module can be installed per Switch. If Cascade
Modules are fitted to both expansion slots in a Switch then both
Modules will be disabled.
■ Cascade Modules are NOT hot-swappable or hot-insertable. Ensure
that the Switch is powered off before inserting or removing a Cascade
Module.
■ The Cascade Extender Unit is hot-insertable. This allows its host
Switch unit to be removed and replaced without disturbing the rest of
the stack.
■ Only 3Com Cascade Cables can be used to connect between Cascade
Modules/Cascade Extender Units.
■ Due to the length of the Cascade Cables, you must insert all of the
Cascade Modules into Expansion Module Slot 1 or all of the Cascade
Modules into Expansion Module Slot 2 on the Switches.
■ It is not possible to stack the Switch 4400, Switch 4400 SE and
Switch 4400 PWR with other SuperStack II or SuperStack 3 products
using the Cascade Stacking Kit (3C17227) or Cascade Extender Kit
(3C17228).
The Switch 4400 PWR can be stacked with all other Switch 4400 Series
switches.
■ 3Com strongly recommends that you upgrade all Switch 4400 units
(24-port and 48-port) in a stack to the latest software agent.
■ 3Com recommends that you initialize a Switch 4400,
Switch 4400 PWR or Switch 4400 SE unit that has previously been
used elsewhere in your network before you add it to an existing stack.
If you do not initialize the unit, problems may be caused by conflicting
Switch configurations.
■ When the Switch 4400s are stacked together they are assigned a unit
number from bottom-to-top for management purposes. When further
Switches are added to the stack, they can be positioned at the bottom
of the stack or at the top. Either way, the Switch management
software will re-order the Switch unit numbers into a logical order
again (from bottom to top).
DUA1720-3AAA05.book Page 29 Friday, March 7, 2003 11:53 AM

3Com SuperStack 3 Switch 4400 Series Specifications

General

Brand	3Com
Model	SuperStack 3 Switch 4400 Series
Category	Switch
Language	English