eSpace IAD
Troubleshooting
2 Analyzing and Rectifying Faults
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Cause
The IAD is not properly grounded.
Solution
Step 1 Check the AT0 grounding by referring to 3.10 Bad AT0 Grounding.
Step 2 Test the grounding resistance by referring to 3.11 AT0 Ground Impedance Test.
Step 3 Check whether the fault is rectified.
If yes, the procedure ends.
If no, go to Step 4.
Step 4 Contact Huawei technical support.
----End
2.3.2 Port Indicator Is Off
Symptom
The LINK indicator of a port of the IAD is off after the network cable is connected.
Cause
The possible causes are as follows:
The device is not powered on.
The network cable and the port is in bad connection.
Network cable is damaged.
Network negotiation failed.
Solution
1. Ensure that the device is powered on.
2. Ensure that the network cable and the port is in good connection.
3. Check the network cable and replace the damaged cables.
4. If you are using the IAD132E(T) to perform the cascading installation, you are advised
to perform one of the following operations:
− Use crossover cable to connect the uplink port.
− In the Ethernet switch mode, run the following command to activate the automatic
check on the Ethernet connecting cable:
TERMINAL(lanswitch)#cable-check enable
5. Ensure that the dual-duplex mode of the WAN portthe FE1/FE2 port of the IAD is
consistent with that of the upper-level switch. Run the duplex autoportid command in
the Ethernet switch mode to set the port to automatic negotiation mode. For IAD101H,
IAD102H, IAD104H, and IAD208E(M), portid is WAN; for IAD132(E), portid is the
number of the uplink port; for IAD1224, portid is FE1/FE2 network interface.
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