7
c.
If the MDI configurations of the two ends are the same and not
auto
, use a straight-through
cable to connect the ports.
5.
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.
6.
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 : 1000_BASE_SX_SFP
Connector Type : LC
Wavelength(nm) : 1310
Transfer Distance(km) : 2000(50um),2000(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : FINISAR CORP.
Part Number : FTLF1217P2BTL
Serial Number : PK433HA
7.
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!
8.
If the issue persists, contact H3C Support.
Related commands
This section lists the commands that you might use for troubleshooting ports.
Command Description
display device
Displays device information.
display interface brief
Displays brief interface information.
display transceiver interface
Displays the key parameters of transceiver modules.
loopback internal
Enables internal loopback testing on an Ethernet interface.
