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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 show controllers fastEthernet commanddisplays the status of the selected switch port.
The Managed LAN Switch feature allows you to set and display the following parameters for each of the switch ports:
It also allows you to display the link state of a switch port--that is, whether a device is connected to that port or not.
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
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, see the “LAN Switching” module of the Internetworking Technology Handbook .
To enable Managed LAN Switch, perform the following steps:
To verify the Managed LAN Switch configuration, perform the following steps:
The following example shows the Managed LAN Switch configured with duplex set to auto and full, with speed set to auto and 100:
configure terminal Enter configuration commands, one per line. End with CNTL/Z. interface fastethernet1 no ip address duplex auto speed auto ! interface fastethernet2 no ip address duplex full <---------------- duplex setting of port 2 speed 100 <----------------- speed setting of port 2 ! interface fastethernet3 no ip address shutdown <-------------- shutting down port 3 duplex auto speed auto ! interface fastethernet4 no ip address duplex auto speed auto !
To verify the Managed LAN Switch configuration, enter the show controllers fastethernet <1-4> command in privileged EXEC mode. The following sample output shows the status of switch port 1.
Router# show controllers fastethernet1
!
Interface FastEthernet1 MARVELL 88E6052
Link is DOWN
Port is undergoing Negotiation or Link down
Speed :Not set, Duplex :Not set
!
Switch PHY Registers:
~~~~~~~~~~~~~~~~~~~~~
00 : 3100 01 : 7849 02 : 0141 03 : 0C1F 04 : 01E1
05 : 0000 06 : 0004 07 : 2001 08 : 0000 16 : 0130
17 : 0002 18 : 0000 19 : 0040 20 : 0000 21 : 0000
!
Switch Port Registers:
~~~~~~~~~~~~~~~~~~~~~~
Port Status Register [00] : 0800
Switch Identifier Register [03] : 0520
Port Control Register [04] : 007F
Rx Counter Register [16] : 000A
Tx Counter Register [17] : 0008
!
The following sections provide references related to the Managed LAN Switch feature.
Related Topic |
Document Title |
---|---|
IP LAN switching commands: complete command syntax, command mode, defaults, usage guidelines, and examples |
Cisco IOS LAN Switching Services Command Reference |
LAN switching |
“LAN Switching” module of the Internetworking Technology Handbook |
Standards |
Title |
---|---|
No new or modified RFCs are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
MIBs |
MIBs Link |
---|---|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs |
Title |
---|---|
No new or modified RFCs are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
Description |
Link |
---|---|
The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. |
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Table 1 | Feature Information for Managed LAN Switch |
Feature Name |
Releases |
Feature Information |
---|---|---|
Managed LAN Switch |
12.3(2)XC |
This feature modifies the output of the show controllers fastethernet commandto show the status of switch port. The following command was modified: show controllers fastethernet |
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