Interface and also Hardware materials Configuration Guide, bromheads.tv IOS XE Gibraltar 16.10.x (Catalyst 9400 Switches)
Chapter locationConfiguring Auto-MDIX
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Configuring Auto-MDIX
Prerequisites because that Auto-MDIX
To configure layer 2 parameters, if the user interface is in class 3 mode, girlfriend must get in the switchport interface configuration command without any type of parameters to put the user interface into great 2 mode. This shuts under the interface and also then re-enables it, which can generate message on the maker to i m sorry the user interface is connected. Once you placed an user interface that is in layer 3 mode into Layer 2 mode, the vault configuration details related to the impacted interface can be lost, and also the interface is went back to its default configuration.
automatic medium-dependent user interface crossover (auto-MDIX) is enabled by default.
Restrictions because that Auto-MDIX
The device might not assistance a pre-standard powered device—such as bromheads.tv IP phones and access points that do not completely support IEEE 802.3af—if that powered machine is linked to the maker through a crossover cable. This is nevertheless of even if it is auto-MIDX is permitted on the move port.
Information about Configuring Auto-MDIX
Auto-MDIX on an Interface
When automatic medium-dependent interface crossover (auto-MDIX) is allowed on an interface, the interface immediately detects the required cable connection type (straight with or crossover) and also configures the link appropriately. As soon as connecting tools without the auto-MDIX feature, you have to use straight-through cables to attach to devices such as servers, workstations, or routers and crossover cables to connect to other devices or repeaters. V auto-MDIX enabled, you can use either form of cable to attach to other devices, and the interface automatically corrects for any kind of incorrect cabling. For much more information about cabling requirements, see the hardware environment guide.
This table reflects the link states that an outcome from auto-MDIX settings and correct and also incorrect cabling.
| On | On | Link up | Link up |
| On | Off | Link increase | Link increase |
| Off | On | Link up | Link up |
| Off | Off | Link increase | Link under |
How come Configure Auto-MDIX
Configuring Auto-MDIX on one Interface
Auto MDIX is rotate on by default. To disable Auto MDIX top top a port, use the no mdix auto command under the user interface configuration mode. To put it earlier to default, usage the mdix auto command in the user interface configuration mode. The adhering to steps show how to enable the Auto MDIX. Procedure| Step1 | allow Example:Device> enable | allows privileged EXEC mode. You are watching: Which configuration must be in place for the auto-mdix feature to function on a switch interface? Enter her password if prompted. |
| Step2 | configure terminal Example:Device# configure terminal | Enters an international configuration mode |
| Step3 | user interface interface-id Example:Device(config)# interface gigabitethernet1/0/1 | mentions the physical interface to be configured, and enter user interface configuration mode. |
| Step4 | mdix auto Example:Device(config-if)# mdix auto | permits the Auto MDIX feature. |
| Step5 | end Example:Device(config-if)# end | return to privileged EXEC mode. |
| Step6 | copy running-config startup-config Example:Device# copy running-config startup-config | (Optional) saves your entries in the construction file. |
Example for Configuring Auto-MDIX
This instance shows exactly how to enable auto-MDIX ~ above a port:
Device# configure terminalDevice(config)# interface gigabitethernet1/0/1 Device(config-if)# mdix autoDevice(config-if)# end
Auto-MDIX and also Operational State
| Auto-MDIX top top (operational: on) | Auto-MDIX is enabled and is fully functioning. |
| Auto-MDIX top top (operational: off) | Auto-MDIX is allowed on this interface but it is no functioning. To permit auto-MDIX attribute to function properly, you have to also collection the interface speed to it is in autonegotiated. |
| Auto-MDIX off | Auto-MDIX has been disabled with the no mdix auto command. |
Additional recommendations for Auto-MDIX
MIBs
| All the sustained MIBs for this release. | To locate and also download MIBs because that selected platforms, bromheads.tv IOS releases, and feature sets, usage bromheads.tv MIB Locator found at the following URL: http://www.bromheads.tv/go/mibs |
Technical Assistance
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Feature history for Auto-MDIX
This table gives release and related details for features described in this module.
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These features are obtainable on all releases subsequent to the one castle were introduced in, unless provided otherwise.
| bromheads.tv IOS XE Everest 16.6.1 | Auto-MDIX on an Interface | An automatically medium-dependent interface crossover (Auto-MDIX) allowed interface detects the required cable connection kind (straight v or crossover) and configures the link appropriately. |
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