Related Commands - H3C SOHO Series Troubleshooting Manual

Comware v5

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Table of Contents

c. If the MDI configurations of the two ends are the same and not auto, use a straight-through

cable to connect the ports.

Verify that the fibers are correctly connected.

a. Verify that the transmit interface of the local transceiver module is connected to the receive

interface of the peer transceiver module.

b. Verify that the receive interface of the local transceiver module is connected to the transmit

interface of the peer transceiver module.

Verify that the cable, transceiver module, and fiber are operating correctly.

a. Unplug the cable or fiber, and plug the cable or fiber to a port that can properly come up. If

the new port cannot come up, the cable or fiber fails. Replace the cable or fiber.

b. Verify a transceiver module in the same way you verify a cable.

c. For a fiber port, verify that the transceiver module type and wavelength match. When the

transceiver module label does not have the related information, execute the display

transceiver interface command.

<Sysname> display transceiver interface gigabitethernet 1/0/25

GigabitEthernet1/0/25 transceiver information:

Transceiver Type

Connector Type

Wavelength(nm)

Transfer Distance(km)

Digital Diagnostic Monitoring : YES

Vendor Name

Part Number

Serial Number

Enable internal loopback testing on the port to verify that the hardware of the port is operating

properly.

[Sysname-GigabitEthernet1/0/2] loopback internal

%Apr 26 12:40:25:309 2000 60CPWR IFNET/4/LINK UPDOWN:

GigabitEthernet1/0/2: link status is UP

%Apr 26 12:40:25:531 2000 60CPWR IFNET/4/LINK UPDOWN:

GigabitEthernet1/0/2: link status is DOWN

Loop internal succeeded!

If the issue persists, contact H3C Support.