No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

Configuration Guide - Interface Management

S9300, S9300E, and S9300X V200R013C00

This document describes the interface management configuration, including basic interface configuration, Ethernet interface configuration, and logical interface configuration.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
An Ethernet Interface Is Physically Down

An Ethernet Interface Is Physically Down

Fault Description

An Ethernet interface is physically Down.

Troubleshooting Procedure

  1. Check whether the devices are powered on, and the interface modules and the link between the interfaces work properly.
    If the two devices are connected by a twisted pair, check the following items.

    Item

    Expected Result

    Follow-up Procedure

    Twisted pair working status

    The tester shows that the twisted pair works properly.

    If the twisted pair is faulty, replace it.

    Twisted pair length

    The twisted pair length is less than 100 m.

    NOTE:

    The 10/100/1000M electrical interfaces use RJ45 connectors and Category 5 or higher twisted pairs. The maximum transmission distance of such cables is 100 m.

    If the twisted pair length exceeds 100 m, perform either of the following operations:
    • Shorten the distance between the two devices.
    • If the distance between the two devices cannot be shortened, deploy a repeater, hub, or switch between the devices.

    Twisted pair type

    Twisted pair cables are classified into straight-through cables and crossover cables.

    A straight-through cable connects Ethernet interfaces between the following devices:
    • A router and a hub
    • A router and an Ethernet switch
    • A computer and an Ethernet switch
    • A computer and a hub

    A crossover cable connects Ethernet interfaces between the following devices:

    • Two routers
    • A router and a computer
    • Two hubs
    • A hub and a switch
    • Two switches
    • Two computers

    If the twisted pair type is incorrect, replace the twisted pair.

    If the two devices are connected by optical fibers, check the following items.

    Item

    Expected Result

    Follow-up Procedure

    Types of optical modules and optical fibers

    The optical fiber type matches the optical module type. For details about mappings between optical modules and optical fibers, see "Pluggable Modules for Interfaces - Important Notes About Using Optical Modules Certified for Huawei Switches" in Hardware Description of a specified model.

    Determine whether the optical fiber type matches the optical module type according to the following information:
    • A multimode optical fiber can be used together with a multimode optical module.
    • A single-mode optical fiber can only be used with a single-mode optical module. Generally, a single-mode optical fiber is yellow, and a multimode optical fiber is orange.
    • Two connected optical modules must have the same wavelength.

    If the optical fiber type does not match the optical module type, replace the optical module or optical fiber.

    Optical fiber length and maximum transmission distance of optical modules

    The optical fiber length must be shorter than the maximum transmission distance of an optical module. For the maximum transmission distance supported by different optical modules, see "Pluggable Modules for Interfaces - Important Notes About Using Optical Modules Certified for Huawei Switches" in Hardware Description of a specified model.

    If the optical fiber length exceeds the maximum transmission distance of the optical modules, shorten the distance between the devices or use optical modules with a longer transmission distance.

    Optical signal attenuation The tester shows that the optical signal attenuation is in the allowed range. For the attenuation range, see "Pluggable Modules for Interfaces - Important Notes About Using Optical Modules Certified for Huawei Switches" in Hardware Description of a specified model. If the attenuation is high, replace the optical fibers. If the fault persists, shorten the distance between the devices and use shorter optical fibers.

    Optical fiber working status

    The tester shows that optical signals are sent and received properly.

    During a loopback test, an interface is Up when both ends of an optical fiber are connected to the same optical module installed on the interface.

    If optical signals cannot be sent or received, replace the optical fibers. If the fault persists, replace the optical modules.

    If the fault persists, go to step 2.

  2. Check whether the local and remote interfaces have been manually shut down.

    Run the display interface command and check the current state field in the command output. If the current state field is Administratively down, the interfaces are shut down. Run the undo shutdown command on the interfaces.

    If the interface is still Down, go to step 3.

  3. Check whether the two interfaces have the same duplex mode, rate, and auto-negotiation mode.

    Run the display interface command on the two interfaces to check their rates, duplex modes, and auto-negotiation modes.

    Item

    Description

    Follow-up Procedure

    Negotiation Auto-negotiation mode of the interface:
    • ENABLE: indicates that the interface works in auto-negotiation mode.
    • DISABLE: indicates that the interface works in non-auto-negotiation mode.

    The two interfaces must work in the same auto-negotiation mode. Run the negotiation auto command in the interface view to configure the interfaces to work in auto-negotiation mode. If the fault persists, configure the interfaces to work in non-auto-negotiation mode and use the same rate and duplex mode.

    Speed

    Interface rate.

    If the rates of the interfaces are different, run the speed command in the interface view to set the same rate on the two interfaces.

    Duplex

    Duplex mode of the interface.

    If the duplex modes of the interfaces are different, run the duplex command in the interface view to set the same duplex mode on the two interfaces.

    Mdi
    MDI type of the interface:
    • across: indicates that the interface can use a crossover cable.
    • auto: indicates that the interface automatically identifies the network cable type. That is, the interface can use a straight-through cable or a crossover cable.
    • normal: indicates that the interface can use a straight-through cable.

    The two interfaces must support the same MDI type. By default, an interface uses the auto type. If the interfaces do not use this type, run the mdi command to set the MDI type of the interfaces to auto.

    If the fault persists, go to step 4.

  4. Check whether the local or remote device has a hardware fault.

    Connect the devices using other interfaces. If the fault persists, go to step 5.

  5. Collect the following information and contact technical support personnel:
    • Results of the preceding troubleshooting procedure
    • Configuration file, logs, and alarms of the device
Translation
Download
Updated: 2019-04-09

Document ID: EDOC1100065861

Views: 6138

Downloads: 11

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Share
Previous Next