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Table Of Contents
Information About Managed LAN Switch
How to Enable Managed LAN Switch
Configuration Examples for Managed LAN Switch
Enabling Managed LAN Switch: Example
Managed LAN Switch
The Managed LAN Switch feature enables the control of the four switch ports in Cisco 831, 836, and 837 routers. Each switch port is associated with a Fast Ethernet interface. The output of the command show controllers fastEthernet <1-4> displays the status of the selected switch port.
The Managed LAN Switch feature allows setting and display of the following parameters for each of the switch ports:
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Speed
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It also allows display of the link state of a switch port—that is, whether a device is connected to that port or not.
Feature History for the Managed LAN Switch Feature
12.3(2)XC
This feature modifies the output of the command show controllers fastEthernet <1-4> to show the status of switch port.
Finding Support Information for Platforms and Cisco IOS Software Images
Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.
Contents
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Information About Managed LAN Switch
To configure the Managed LAN Switch feature, you should understand the following concept:
LAN Switching
A LAN is a high-speed, fault-tolerant data network that supplies connectivity to a group of computers, printers, and other devices that are in close proximity to each other, as in an office building, a school or a home. LANs offer computer users many advantages, including shared access to devices and applications, file exchange between connected users, and communication between users via electronic mail and other applications.
For more information about LAN switching, refer to the following URL:
http://www.cisco.com/en/US/tech/tk389/tech_topology_and_network_serv_and_protocol_suite_home.html
How to Enable Managed LAN Switch
This section contains the following procedure:
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Enabling Managed LAN Switch
To enable Managed LAN Switch, perform the following steps:
SUMMARY STEPS
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DETAILED STEPS
Verifying Managed LAN Switch
To verify the Managed LAN Switch configuration, enter the show controllers fastEthernet <1-4> command in EXEC mode. The following sample output shows the status of switch port 1.
Router#show controllers fastEthernet 1!Interface FastEthernet1 MARVELL 88E6052Link is DOWNPort is undergoing Negotiation or Link downSpeed :Not set, Duplex :Not set!Switch PHY Registers:~~~~~~~~~~~~~~~~~~~~~00 : 3100 01 : 7849 02 : 0141 03 : 0C1F 04 : 01E105 : 0000 06 : 0004 07 : 2001 08 : 0000 16 : 013017 : 0002 18 : 0000 19 : 0040 20 : 0000 21 : 0000!Switch Port Registers:~~~~~~~~~~~~~~~~~~~~~~Port Status Register [00] : 0800Switch Identifier Register [03] : 0520Port Control Register [04] : 007FRx Counter Register [16] : 000ATx Counter Register [17] : 0008!
Configuration Examples for Managed LAN Switch
This section provides the following configuration example:
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Enabling Managed LAN Switch: Example
The following example shows the Managed LAN Switch configured with duplex set to auto and full, speed set to auto and 100:
configure terminalEnter configuration commands, one per line. End with CNTL/Z.interface fastEthernet1no ip addressduplex autospeed auto!interface fastEthernet2no ip addressduplex full <---------------- duplex setting of port 2
speed 100 <----------------- speed setting of port 2
!interface fastEthernet3no ip addressshutdown <-------------- shutting port 3
duplex autospeed auto!interface fastEthernet4no ip addressduplex autospeed auto!Additional References
The following sections provide references related to the Managed LAN Switch feature.
Related Documents
Cisco IOS Release 12.3 Configuration Guides and Command References
Cisco IOS Release 12.3 Configuration Guides and Command References
Standards
MIBs
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To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:
RFCs
Technical Assistance
Command Reference
This section documents a modified command. All other commands used with this feature are documented in the Cisco IOS Release 12.3 T command reference publications.
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show controllers fastEthernet
To display the staus of the switch port, use the show controllers fastEthernet command in user EXEC or privileged EXEC mode.
show controllers fastEthernet port
Syntax Description
Command Modes
User EXEC
Privileged EXEC
Command History
11.2
This command was introduced.
12.3(2)XC
The output of this command was modified to show the status of switch port.
Examples
The following example shows how to display the status of switch port 1:
Router#show controllers fastEthernet 1!Interface FastEthernet1 MARVELL 88E6052Link is DOWNPort is undergoing Negotiation or Link downSpeed :Not set, Duplex :Not set!Switch PHY Registers:~~~~~~~~~~~~~~~~~~~~~00 : 3100 01 : 7849 02 : 0141 03 : 0C1F 04 : 01E105 : 0000 06 : 0004 07 : 2001 08 : 0000 16 : 013017 : 0002 18 : 0000 19 : 0040 20 : 0000 21 : 0000!Switch Port Registers:~~~~~~~~~~~~~~~~~~~~~~Port Status Register [00] : 0800Switch Identifier Register [03] : 0520Port Control Register [04] : 007FRx Counter Register [16] : 000ATx Counter Register [17] : 0008!
Related Commands
show interfaces fastEthernet
Displays information about Fast Ethernet interfaces 1through 4.
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