Cisco Catalyst 1000 Series User Manual

• Verify that the power supply installed in the switch meets the power requirements of your connected
devices.
• Verify that there is sufficient PoE power budget to provide power to the attached device. Use the show
power inline global configuration command to check on the available PoE power budget.
• Verify the cable type. Many legacy powered devices, including older Cisco IP phones and access points
that do not fully support IEEE 802.3af, might not support PoE when connected to the switch by a crossover
cable. Replace the crossover cable with a straight-through cable.
Noncompliant cabling or powered devices can cause a PoE port fault. Use only
standard-compliant cabling to connect Cisco prestandard IP Phones and wireless
access points or IEEE 802.3af-compliant devices. You must remove any cable
or device that causes a PoE fault.
Caution
10/100/1000 Ethernet Port Connections
The switch 10/100/1000 Ethernet port configuration changes to operate at the speed of the attached device.
If the attached ports do not support autonegotiation, you can manually set the speed and duplex parameters.
Connecting devices that do not autonegotiate or that have the speed and duplex parameters manually set can
reduce performance or result in no linkage.
To maximize performance, choose one of these methods for configuring the Ethernet ports:
• Let the ports autonegotiate both speed and duplex.
• Set the interface speed and duplex parameters on both ends of the connection.
Auto-MDIX Connections
The autonegotiation and the auto-MDIX features are enabled by default on the switch.
With autonegotiation, the switch port configurations change to operate at the speed of the attached device. If
the attached device does not support autonegotiation, you can manually set the switch interface speed and
duplex parameters.
With auto-MDIX, the switch detects the required cable type for copper Ethernet connections and configures
the interface accordingly.
If auto-MDIX is disabled, use the guidelines in this table to select the correct cable.
Table 4: Recommended Ethernet Cables (When Auto-MDIX is Disabled)
Straight-Through CableCrossover CableDevice
NoYesSwitch to switch
NoYesSwitch to hub
YesNoSwitch to computer or server
Cisco Catalyst 1000 Series 24-Port and 48-Port Switch Hardware Installation Guide
33
Switch Installation
10/100/1000 Ethernet Port Connections

Cisco Catalyst 1000 Series Specifications

General

Brand	Cisco
Model	Catalyst 1000 Series
Category	Switch
Language	English