Configuring Power Over Ethernet On An Interface - Cisco WS-C3560-48PS-S Software Configuration Manual

Configuring Ethernet Interfaces
Table 10-2 Link Conditions and Auto-MDIX Settings
Local Side Auto-MDIX
On
On
Off
Off
Beginning in privileged EXEC mode, follow these steps to configure Auto-MDIX on an interface:
Command
Step 1 configure terminal
Step 2 interface interface-id
Step 3
speed auto
Step 4
duplex auto
Step 5
mdix auto
Step 6 end
Step 7
show controllers ethernet-controller
interface-id phy
Step 8
copy running-config startup-config
To disable Auto-MDIX, use the no mdix auto interface configuration command.
This example shows how to enable Auto-MDIX on a port:
Switch# configure terminal
Switch(config)# interface fastethernet0/1
Switch(config-if)# speed auto
Switch(config-if)# duplex auto
Switch(config-if)# mdix auto
Switch(config-if)# end

Configuring Power over Ethernet on an Interface

The switch supports both the Cisco pre-standard PoE method and the IEEE 802.3af PoE standard. The
switches automatically supply power to connected pre-standard powered devices (such as Cisco IP
Phones and Cisco Aironet Access Points), and IEEE 802.3af-compliant powered devices if the switch
senses that there is no power on the circuit.
On a 24-port PoE switch, each 10/100 port provides 15.4 W of power. On a 48-port PoE switch, any
24 of the 48 10/100 ports provide 15.4 W of power, or any combination of ports provide an average of
7.7 W of power at the same time, up to a maximum switch power output of 370 W.
A powered device can receive redundant power when it is connected to a PoE switch port and to an AC
power source. If a device being powered by the switch is then connected to wall power, the switch might
continue to power the device. The switch continues to report that it is still powering the device whether
the device is being powered by the switch or receiving power from an AC power source.
Catalyst 3560 Switch Software Configuration Guide
10-16
Remote Side Auto-MDIX With Correct Cabling
On Link up
Off Link up
On Link up
Off Link up
Purpose
Enter global configuration mode
Enter interface configuration mode for the physical interface to be
configured.
Configure the interface to autonegotiate speed with the connected device.
Configure the interface to autonegotiate duplex mode with the connected
device.
Enable Auto-MDIX on the interface.
Return to privileged EXEC mode.
Verify the operational state of the Auto-MDIX feature on the interface.
(Optional) Save your entries in the configuration file.
Chapter 10 Configuring Interface Characteristics
With Incorrect Cabling
Link up
Link up
Link up
Link down
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