Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 

Finding the Ethernet speed of the device

 

 

Introduction

 

Finding the Ethernet speed of the device

 

Core Issue

 

Locating a device's Ethernet speed.

 

Resolution

 

  • Access Point: The Access Point's Ethernet port will support either 10 Mbps or 100 Mbps over an RJ-45 connector, in either half- or full-duplex. We advise that you hard set the speed and duplex to the same settings as your switch or hub.

 

  • Workgroup Bridge: The bridge's Ethernet port supports 10 mbps over a 10baseT RJ-45 connector, and only half-duplex is supported.

 

  • Base Station: The base station's Ethernet port supports 10 Mbps over a 10base T RJ-45 connector, and only half-duplex is supported.

 

Problem Type

Technical product specification / features

 

Products

Access point

Base Station

Workgroup bridges

 

Addtional Information

 

Configuring Ethernet Speed and Duplex Settings

 

The Cisco 1941-W ISR interface supports only 1000 Mbps speed and duplex settings by default, and the interface is always up. When the wireless device receives inline power from a switch, any change in the speed or duplex settings that resets the Ethernet link reboots the wireless device.

 

Note The speed and duplex settings on the wireless device Ethernet port must match the Ethernet settings on the port to which the wireless device is connected. If you change the settings on the port to which the wireless device is connected, change the settings on the wireless device Ethernet port to match.

 

The Ethernet speed and duplex are set to auto by default. To configure Ethernet speed and duplex, follow these steps, beginning in privileged EXEC mode:

 

Summary STEPS

 

1. configure terminal

2. interface fastethernet0

3. speed {10 | 100 | auto}

4. duplex {auto | full | half}

5. end

6. show running-config

7. copy running-config startup-config

 

Detailed STEPS

 

 

   

Command or Action

 

Purpose

Step 1

configure terminal

Enters global configuration mode.

Step 2

interface fastethernet0

Enters configuration interface mode.

Step 3

speed {10 | 100 | auto}

Configures the Ethernet speed.Note We recommend that you use auto, the default setting.

Step 4

duplex {auto | full | half}

Configures the duplex setting.

Note We recommend that you use auto, the default setting.

Step 5

end

Returns to privileged EXEC mode.

Step 6

show running-config

Verifies your entries.

Step 7

copy running-config startup-config

(Optional) Saves your entries in the configuration file.

 

 

Reference

 

Administering Wireless Device Communication - Configuring Ethernet Speed and Duplex Settings