Stacking Information And Topologies - Aruba 2930M Installation And Getting Started Manual

• See the ArubaOS-Switch Transceiver Guide at http://www.hpe.com/networking/ResourceFinder. (Select
"Transceivers and Accessories" in the "Products" field.)
• See the supported transceivers information in the QuickSpecs for your switch model at http://www.hpe.com/
networking/products, along with minimum software versions to support the listed transceivers:
1. Select Switches.
2. Select Aruba Switches.
3. Select a switch model.
4. Select Product Details
5. Select an option under QuickSpecs.
Hot swapping SFP/SFP+/QSFP+ transceivers
Supported SFP/SFP+/QSFP+ transceivers that you can install in your Aruba switch can be "hot swapped"–
removed and installed while the switch is receiving power. However, disconnect the network cables from the
SFP/SFP+/QSFP+ transceivers before hot-swapping them.
When you replace a SFP/SFP+/QSFP+ transceiver with another transceiver of a different type, the switch may
retain selected port-specific configuration settings that were configured for the replaced unit. Be sure to validate or
reconfigure port settings as required.
SFP/SFP+/QSFP+ connections to devices with fixed speed/duplex configurations
When connecting a device to your switch port that contains a SFP/SFP+/QSFP+ transceiver, the speed and
duplex settings of the switch port and the connected device must match. Otherwise, the device may not link
properly—you may not get a link. For some older network devices, the default speed/duplex settings may be
predefined such that they are set differently from the default configuration of your switch. (For example, 1000
Mbps/Full Duplex.) These setting differences may also apply to some older Hewlett Packard Enterprise devices.
Because of these default speed/duplex considerations, make sure that devices connected to your SFP/SFP+/
QSFP+ ports are properly configured. At a minimum, make sure the configurations match.

Stacking information and topologies

When 2930M stacking modules (JL325A) are installed in the switches, any combination of up to ten 2930M
switches can be stacked together via high-speed backplane cables to form a single extended virtual switch.
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.
NOTE: If an 2930M 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 2930M switches:
Chapter 3 Installing the switch 51