Unexpected breaking down of S series switch

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If a switch stopping responding during operating, upgrade the switch or install the related patch. If the fault persists, collect diagnosis information and contact Huawei technical support at e_online@huawei.com.

Other related questions:
Loop prevention and breaking on S series switch
For S series switches except S1700 switches, use any of the following methods to remove loops: 1. Configure features such as STP, RSTP, MSTP, VBST,RRPP, and SEP to prevent loops. 2. Bundle dual physical links into a single logical link to prevent loops while implementing redundancy and increasing bandwidth. 3. Configure the switch to transparently transmit packets of different VLANs along different paths. 4. Enable loop detection and loopback detection to detect loops on the switch or downstream network connected to the switch, and configure the switch to take the preconfigured action to remove loops. Fixed switches only support loopback detection.

S series switches during the upgrade process unexpected power failure, upgrade failed
S series switches (except S1700) set to start from a large package after the reset, if any loss occurs in the process, the software that the package can not start normally, will find the last successful start of the large package file.

Server fault
If your server is fault, contact Huawei technical support via http: //e.huawei.com/en/service-hotline.

How to shut down S series switches
The S series switches (except the S1700) cannot be shut down by running a command. Instead, you can only power off S series switches using the hardware. The procedure is as follows:
1. (Optional) Save the current configuration file of the device.
 <HUAWEI> save
2. Power off the device
a. For S series modular switches, if the device uses pluggable power modules, turn off all the power modules and cut off external power cable.
b. For S series fixed switches, if the device uses built-in power modules, cut off the external power cable. Note that shutting down the device will interrupt services. Exercise caution when performing this operation.

CE series switch Error-Down mechanism
For more information about the CloudEngine Series Switches Error-Down Mechanism, click CloudEngine Series Switches Error-Down Mechanism.

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