Prerequisites for Auto-MDIX | Cisco Systems WSC2960X48TDL specs

C H A P T E R 3

Configuring Auto-MDIX

This module contains the following sections:

•Prerequisites for Auto-MDIX, page 41

•Restrictions for Auto-MDIX, page 41

•Information about Configuring Auto-MDIX, page 42

•How to Configure Auto-MDIX, page 42

•Monitoring Auto-MDIX, page 43

•Example for Configuring Auto-MDIX, page 44

Prerequisites for Auto-MDIX

Automatic medium-dependent interface crossover (auto-MDIX) is enabled by default. When you enable auto-MDIX, you must also set the interface speed and duplex to auto so that the feature operates correctly.

Auto-MDIX is supported on all 10/100/1000-Mb/s and on 10/100/1000BASE-TX small form-factor pluggable (SFP)-module interfaces. It is not supported on 1000BASE-SX or -LX SFP module interfaces.

Restrictions for Auto-MDIX

The switch might not support a pre-standard powered device—such as Cisco IP phones and access points that do not fully support IEEE 802.3af—if that powered device is connected to the switch through a crossover cable. This is regardless of whether auto-MIDX is enabled on the switch port.

Catalyst 2960-X Switch Interface and Hardware Component Configuration Guide, Cisco IOS Release 15.0(2)EX

OL-29034-01

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Cisco Systems WSC2960X48TDL manual Prerequisites for Auto-MDIX, Restrictions for Auto-MDIX

Contents

First Published July 10 Americas HeadquartersPage N T E N T S Contents Configuring Auto-MDIX41 Configuring System MTU Configuring EEE Viii Bold font Document ConventionsConvention Description Reader Alert Conventions Vertical barsElement Related Documentation Obtaining Documentation and Submitting a Service Request Xii This chapter contains the following topics Information About Using the Command-Line InterfaceCommand Modes Configure Mode Access Method Prompt Exit Method About This ModeQuit Ctrl-Z Command or Action Purpose Step Using the Help SystemMode Help CLI Error Messages Understanding Abbreviated CommandsNo and default Forms of Commands Configuration Logging How to Use the CLI to Configure FeaturesConfiguring the Command History Error Message Meaning Command or Action Changing the Command History Buffer SizeRecalling Commands Disabling the Command History Feature Enabling and Disabling Editing FeaturesPrivileged Exec mode Terminal no history Editing Commands through Keystrokes Editing Command Lines That Wrap Access-list Searching and Filtering Output of show and more CommandsShow more command begin include exclude regular-expression Show more command begin include exclude Command or Action Example OL-29034-01 Information About Configuring Interface Characteristics Finding Feature InformationInterface Types This module contains the following topics Port-Based VLANs Switch Ports Trunk Ports Switch Virtual Interfaces EtherChannel Port Groups Power over Ethernet Ports USB Mini-Type B Console Port Using the Switch USB Ports USB Type a Ports Interface Connections Connecting VLANs with the Switch Interface Configuration Mode Feature Default Ethernet Interface ConfigurationDefault Setting Layer 2 or switching mode switchport command VLANs 1 Speed and Duplex Configuration Guidelines Interface Speed and Duplex Mode Ieee 802.3x Flow Control Configuring Interfaces Procedure How to Configure Interface CharacteristicsGigabit Ethernet port 1 on switch 1 is selected Either gigabitethernet 1/0/1 Adding a Description for an Interface Configure terminalDescription string Show interfaces interface-id description Interface range port-rangemacro Configuring a Range of InterfacesConfigure terminal Enters global configuration mode Define interface-range macroname Configuring and Using Interface Range MacrosVerifies the configuration of the interfaces in the range Interface range macro macroname Configuring Ethernet InterfacesSetting the Interface Speed and Duplex Parameters Nonegotiate Speed 10 100 1000 auto 10 Command or Action Purpose Configuring Ieee 802.3x Flow Control Enter interface configuration mode Configuring SVI Autostate ExcludeEnd Returns to privileged Exec mode Shutting Down and Restarting the Interface Switchport autostate excludeAn SVI line state up or down Interface vlan vlan-id gigabitethernet interface-id This configuration applies to all switches in a stack Configuring the Console Media TypeConfigure terminal Line console Media-type rj45 End Shutdown Shuts down an interface Configure terminal Enters the global configuration mode Configuring the USB Inactivity Timeout Command Purpose Monitoring Interface CharacteristicsShow interfaces interface-id status err-disabled Show interfaces interface-id switchport Clearing and Resetting Interfaces and Counters Identifying Interfaces on a Stack-Capable Switch Examples Configuration Examples for Interface CharacteristicsConfiguring a Range of Interfaces Examples Adding a Description to an Interface Example Configuring the Console Media Type Example Configuring and Using Interface Range Macros ExamplesSetting Interface Speed and Duplex Mode Example To disable the configuration, use these commands Configuring the USB Inactivity Timeout ExampleStandards and RFCs Standard/RFC None Release Modification Cisco IOS Release 15.02EX This feature was introducedTechnical Assistance Description Link OL-29034-01 This module contains the following sections Prerequisites for Auto-MDIXRestrictions for Auto-MDIX How to Configure Auto-MDIX Information about Configuring Auto-MDIXConfiguring Auto-MDIX on an Interface Auto-MDIX on an Interface Monitoring Auto-MDIX This example shows how to enable auto-MDIX on a port Example for Configuring Auto-MDIX Information about the Ethernet Management Port Prerequisites for Ethernet Management Ports Supported Features on the Ethernet Management Port Ethernet Management Port Direct Connection to a Switch Disabling and Enabling the Ethernet Management Port How to Configure the Ethernet Management Port What to Do Next Additional References Related Topic Bootloader commandsMIBs Document Title OL-29034-01 Configuring LLDP, LLDP-MED, and Wired Location Service Lldp and Cisco Medianet Lldp and Cisco Switch StacksLldp Supported TLVs LLDP-MED Supported TLVs Wired Location Service Configuration Guidelines Default Lldp Configuration Lldp run Enables Lldp globally on the switch Configure terminal Lldp runLLDP, and enter interface configuration mode Enabling Lldp Lldp transmit Enables the interface to send Lldp packets Configuring Lldp CharacteristicsLldp receive Enables the interface to receive Lldp packets Show lldp Verifies the configuration Switchconfig# lldp holdtime Command or Action Purpose Step Configuring LLDP-MED TLVs Lldp med-tlv-select Specifies the TLV to enable Lldp med-tlv-select End Copy running-config startup-config Configuration mode. The range is 1 to Configuring Network-Policy TLV Dscp dvalue none untagged Voice voice-signalingvlan vlan-idcos Show network-policy profile Verifies the configuration Configuring Location TLV and Wired Location Service Way Use one of the following Information, and enter interface configuration mode Exit Returns to global configuration modeUse one of the following Verifies the configuration Enters location information for an interface Command or Action Purpose Example Enabling Wired Location Service on the Switch Nmsp notification interval attachment location Configuring Network-Policy TLV ExamplesNmsp enable Enables the Nmsp features on the switch Command Description Civic location OL-29034-01 System MTU Guidelines Information about the MTU Configuring the System MTU How to Configure MTU Sizes Reload Reloads the operating system Configuration Examples for System MTUShow system mtu Verifies your settings Additional References for System MTU Restrictions for PoE Configuring PoE Supported Protocols and Standards Power over Ethernet PortsInformation about PoE Class Powered-Device Detection and Initial Power Allocation Power Management Modes Power Monitoring and Power Policing Maximum Power Allocation Cutoff Power on a PoE Port Configuring a Power Management Mode on a PoE Port How to Configure PoE Never static max max-wattage Budgeting Power for Devices Connected to a PoE PortShow power inline No cdp run Optional Disables CDP Budgeting Power to All PoE ports Configure terminal No cdp run Budgeting Power to a Specific PoE Port Power inline consumption wattage Configuring Power PolicingSpecifies the physical port to be configured, and enter Show power inline police Show errdisable recovery Power inline police actionlog errdisable ExitConfiguration mode Power inline police actionlog errdisable Down the port and puts the port in the error-disabled state Power inline police action log-Generates a syslog messageWhile still providing power to the port Budgeting Power Example Monitoring Power StatusConfiguration Examples for Configuring PoE EEE Overview Information About EEE Default EEE Configuration How to Configure EEEEEE is disabled by default Restrictions for EEE Power efficient-ethernet auto Specifies the interface to be configured, and enterCommand Monitoring EEE This example shows how to disable EEE for an interface Configuration Examples for Configuring EEEThis example shows how to enable EEE for an interface Feature History and Information for Configuring EEE OL-29034-01 D E PoE