H3C s5800 series Troubleshooting Manual - page 15
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1.
Verify that the physical connection of the port is correct:
a.
Unplug and then plug in the network cable of the port.
b.
Verify that the port is up.
2.
Verify that the port is not shut down:
a.
Execute the display interface brief command.
b.
Check whether ADM appears in the second column of the output for the port.
c.
If ADM appears, use the undo shutdown command to bring up the port.
3.
Verify that the speed and duplex mode of the port match those of the peer port:
a.
Execute the display interface brief command.
b.
Check whether the speed and duplex mode of the port match those of the peer port.
c.
If they do not match, use the speed command and the duplex command to set the speed and
duplex mode for the port.
4.
Examine the network cable quality or verify that the transceiver module type of the fiber port
matches the wavelength:
a.
Replace the network cable with a new one, and verify that the port is up.
b.
If the port is a fiber port, verify that the transceiver module type of the fiber port matches the
wavelength.
If the transceiver module information is not on the label, use the display transceiver interface
command to display the transceiver module information.
Ten-GigabitEthernet1/1/1 transceiver information:
Transceiver Type : 10G_BASE_SR_SFP
Connector Type : LC
Wavelength(nm) : 850
Transfer Distance(m) : 80(50um),30(62.5um)
Digital Diagnostic Monitoring : YES
Vendor Name : FINISAR CORP.
Ordering Name : SFP_XGE_SX-MM850
5.
If the port is on a subcard, verify that the subcard is operating correctly:
a.
Execute the display device command.
b.
Check whether Normal appears in the last column of the output for the subcard.
c.
If Normal does not appear in the last column, re-plug in the subcard or replace the subcard
with a subcard of the same model.
[Sysname-GigabitEthernet1/0/2]display device
Slot 1
SubSNo PortNum PCBVer FPGAVer CPLDVer BootRomVer AddrLM Type State
0 52 Ver.B NULL 003 003 018 IVL MAIN Normal
1 4 Ver.A NULL 002 NULL IVL LSW1SP4P0 Normal
2 16 Ver.A NULL 001 NULL IVL LSW1GP16P0 Normal
3 1 Ver.A NULL 000 NULL IVL LSWM1IPS10 Normal
6.
Enable internal loopback testing on the port to verify that the physical port is operating correctly.
[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