Cisco CATALYST 2960 - Power over Ethernet Features; Ability to provide power to connected Cisco pre-standard and IEEE 802.3 af-compliant powered devices from Power over Ethernet (PoE)-capable ports if the switch detects that there is no power on the circuit.; Support for IEEE 802.3 at, (PoE+) that increases the available power that can be drawn by powered devices from 15.4 W per port to 30 W per port (Catalyst 2960-S only); Support for Cisco intelligent power management. The powered device and the switch negotiate through power-negotiation CDP messages for an agreed power-consumption level. The negotiation allows a high-power Cisco powered device, which consumes more than 7 W, to operate at its highest power mode. The powered device first boots up in low-power mode, consumes less than 7 W, and negotiates to obtain enough power to operate in high-power mode. The device changes to high-power mode only when it receives confirmation from the switch.

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Catalyst 2960 Switch Command Reference
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Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
clear errdisable interface
clear errdisable interface
Use the clear errdisable interface privileged EXEC command to re-enable a VLAN that was error
disabled.
clear errdisable interface interface-id vlan [vlan-list]
Syntax Description
Command Default No default is defined
Command Modes Privileged EXEC
Command History
Usage Guidelines You can re-enable a port by using the shutdown and no shutdown interface configuration commands,
or you can clear error disable for VLANs by using the clear errdisable interface command.
Examples This example shows how to re-enable all VLANs that were error-disabled on port Gi4/0/2.
Switch# clear errdisable interface GigabitEthernet4/0/2 vlan
Related Commands
vlan list (Optional) Specify a list of VLANs to be re-enabled. If a vlan-list is not
specified, then all VLANs are re-enabled.
Release Modification
12.2(37)SE This command was introduced.
Command Description
errdisable detect cause Enables error-disabled detection for a specific cause or all
causes.
errdisable recovery Configures the recovery mechanism variables.
show errdisable detect Displays error-disabled detection status.
show errdisable recovery Display error-disabled recovery timer information.
show interfaces status err-disabled Displays interface status of a list of interfaces in
error-disabled state.