An Interface Does Not Go Up
Common Causes
This fault is commonly caused by the following:
l The interface is in Error-Down state.
l The transmission medium is problematic.
l The configuration is incorrect.
Troubleshooting Procedure
If an interface does not go Up, perform the following steps to locate the fault (save operation records):
Step 1 Check whether the interface is in Error-Down state.
<HUAWEI> display interface
10ge 1/0/1
10GE1/0/1 current state : ERROR DOWN(link-flap) (ifindex:
5)
Line protocol current state : DOWN
……
l If the interface is in Error-Down state, rectify the fault according to:
− Enterprise network technical support website: CloudEngine Series Switches Error-Down Mechanism.
− Carrier network technical support website: CloudEngine Series Switches Error-Down Mechanism.
l If the interface is not in Error-Down state, go to step 2.
Step 2 Check whether optical module information is correct.
<HUAWEI> display interface
10ge 1/0/3 transceiver verbose
10GE1/0/3 transceiver
information:
-------------------------------------------------------------------
Common
information:
Transceiver
Type
:10GBASE_SR
Connector
Type
:LC
Wavelength
(nm)
:850
Transfer Distance
(m)
:30(62.5um/125um
OM1)
80(50um/125um
OM2)
300(50um/125um
OM3)
400(50um/125um
OM4)
……
-------------------------------------------------------------------
Alarm
information:
LOS
Alarm
-------------------------------------------------------------------
Diagnostic
information:
Temperature
(Celsius)
:34.68
Voltage
(V)
:3.36
Bias Current
(mA)
:7.03
Bias High Threshold
(mA)
:10.00
Bias Low Threshold
(mA)
:2.60
Current RX Power
(dBm)
:-50.00
Default RX Power High Threshold (dBm)
:1.50
Default RX Power Low Threshold (dBm)
:-14.00
Current TX Power
(dBm)
:-2.22
Default TX Power High Threshold (dBm)
:-1.00
Default TX Power Low Threshold (dBm)
:-8.00
-------------------------------------------------------------------
l View the Transceiver Type field to check whether the local optical module type matches the remote optical module type. For example, if a GE optical module is installed on the remote interface and a 10GE optical module is installed on the local interface, the interfaces do not go Up. You can replace the optical module on the local or remote interface based on actual requirements so that the local and remote optical modules have the same rate.
l View the Transfer Distance field to check the transmission distance of the optical module, and determine whether the optical fiber length is within the allowed transmission distance range of the optical module based on the optical fiber type. In the preceding command output, the transmission distance supported by OM1 optical fibers is 30 m. If the actual transmission distance exceeds 30 m, use an optical fiber with a longer transmission distance.
l View the Current TX Power and Current RX Power fields under Diagnostic information to check whether the transmit and receive optical power of the optical module are normal.
For example, if the value of the Current RX Power field is between values of the Default RX Power High Threshold (dBm) and Default RX Power Low Threshold (dBm) fields, the receive optical power is normal. Otherwise, the receive optical power is abnormal. Check whether the remote optical module is normal or connects to an optical fiber correctly. Similarly, if the value of Current TX Power exceeds the allowed range, the transmit optical power is abnormal. Check whether the local optical module is normal or connects to an optical fiber correctly.
l Check the Alarm information field to determine whether the optical module is certified for Huawei Ethernet switches. If the alarm message "Non-Huawei-Certified Transceiver" or "Non-Huawei-Ethernet-Switch-Certified Transceiver" is displayed, the optical module is not certified for Huawei Ethernet switches. Replace it with one that is certified for Huawei Ethernet switches.
If values of the preceding fields are normal, go to step 3.
Step 3 Check whether the configurations of the local and remote interfaces are different.
<HUAWEI> system-view
[~HUAWEI] interface 10ge 1/0/1
[~HUAWEI-10GE1/0/1] display this
#
interface
10GE1/0/1
device transceiver
1000BASE-X
negotiation
disable
#
Return
[~HUAWEI-10GE1/0/1] display this interface
10GE1/0/1 current state : DOWN (ifindex:
3109)
Line protocol current state :
DOWN
Description:
Switch Port, PVID : 1, TPID : 8100(Hex), The Maximum Frame
Length is 9216
Internet protocol processing :
disabled
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is
0019-7459-3301
Port Mode: COMMON COPPER, Port
Split/Aggregate: DISABLE
Speed:
AUTO,
Loopback:
NONE
Duplex:
FULL,
Negotiation:
DISABLE
Input Flow-control: DISABLE, Output Flow-control:
DISABLE
……
l View the display this command output to check whether the configuration of the local interface is the same as that of the remote interface, for example, check whether the interface is shut down or configured with the training function.
l View the Negotiation, Speed, and Duplex fields in the display this interface command output to check whether the auto-negotiation mode, rate, and duplex mode of the local and remote interfaces match.
If the configurations are different, modify the configurations so that the local and remote interfaces have the same auto-negotiation mode, rate, and duplex mode. If the configurations are the same, go to step 4.
Step 4 Collect the following information and contact technical support personnel:
l Results of the preceding troubleshooting procedure
l Configuration file, logs, and alarms of the device
Relevant Alarms and Logs
Relevant Alarms
DEVM_1.3.6.1.4.1.2011.5.25.219.2.4.5 hwOpticalInvalid
If the preceding alarm is displayed, collect information about optical modules on the local and remote interfaces and configurations of the interfaces, and contact technical support personnel.
Relevant Logs
DEVM/4/hwOpticalInvalid
You can also find the answer in Typical Fault Troubleshooting Guide in Maintenance and Troubleshooting.
