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© 2013 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 8 of 18
Q. Which SDM template should be selected on the Cisco Catalyst 2960-X Series with LAN Base to form a mixed
stack with Cisco Catalyst 2960-S?
A. If Cisco Catalyst 2960-S is running the “default” SDM template, then Cisco Catalyst 2960-X must use the
“default” template. If Cisco Catalyst 2960-S is running the “lanbase-routing” template, then Cisco Catalyst
2960-X must use the same.
Q. Can Cisco Catalyst 2960-S be the stack master in a mixed stack of 2960-S and 2960-X switches?
A. Yes. Cisco Catalyst 2960-S can be stack master in a mixed stack.
Q. In a mixed stack of Cisco Catalyst 2960-S and 2960-X, must all the switches be on the same Cisco IOS
Software release?
A. Yes. All the switches in the stack, regardless of model, must be on the same Cisco IOS Software release.
This includes the rebuild number. The minimum Cisco IOS Software release that will support both 2960-S and
2960-X is 15.0(2)EX.
Q. Can we use FlexStack stacking modules with Cisco Catalyst 2960-X Series?
A. No. The form factors of FlexStack-Plus and FlexStack modules are different. The FlexStack stacking module
cannot be used with the Cisco Catalyst 2960-X Series. Similarly, the FlexStack-Plus module cannot be used
with the Cisco Catalyst 2960-S Series.
Energy Efficiency
Q. How much power can be saved with energy efficiency features in the Cisco Catalyst 2960-X Series?
A. Catalyst 2960-X Series introduced new innovative energy saving modes for the switch.
●
The Switch Hibernation Mode puts the switch to sleep when the switch is not in use. This feature enables
the switch to save up to 90% of power during non-business hours.
●
Downlink Hibernation Mode powers down the PHY and the optics of the downlink port when not in use.
●
Energy Efficient Ethernet (EEE) enables dynamic power savings on all switch ports; saves about 15W for
a 48port-switch and 8W for a 24 port-switch.
●
EnergyWise Puts IP End Points in Energy Saver mode, saving 60%+ power with non-active IP devices.
The collective power savings with different energy efficient technologies will reduce the power consumption by
up to 80%.
Q. What is Downlink Hibernation Mode in the Cisco Catalyst 2960-X Series?
A. Downlink Hibernation Mode (DHM) feature enables all 2960-X switches to save power on the downlink ports.
The switch supports static downlink port power-down where only the PHY and Optics are powered down when
not in use.
Q. What is switch hibernation mode in the Cisco Catalyst 2960-X Series?
A. When the switch is not in use, switch hibernation mode can be scheduled to save power. When the switch is
in hibernation mode, it powers off application-specific integrated circuits (ASICs), and connected PoE devices.
Power to most of the components is off. The DRAM is in refresh mode, keeping data intact. The switch
hibernation mode is integrated with EnergyWise.
Q. Is a Cisco Catalyst 2960-X Series Switch usable while in hibernation mode?
A. No. All hardware components on the data path are switched off on Cisco Catalyst 2960-X Series Switches
during hibernation mode.