How many license files are required for a stack of CE switches

4

You can apply for a license file for each ESN or one license file for multiple ESNs.

Other related questions:
How many cables are required for setting up a stack of CE switches
At least one cable is required to connect two member switches. To ensure reliability, you are advised to use two cables to connect different cards of two member switches.

Load a license file to a stack of switches
Perform the following steps to load a license file to a stack system: 1. Apply for a license and upload the license file to the master switch of the stack system. A license is bound to the ESN of a physical device, and each stack member has an independent ESN. You can apply for a license for two switches in a stack or for each switch. 2. Run the license active file-name command in the user view to activate the uploaded license file. ? If there are multiple license files, run the license active file-name command multiple times and specify different file names each time. The system will then find the matching ESNs to activate the license files. ? If there is only one license file, run the license active file-name command only once. 3. Run the display license command to check whether the license file has been successfully loaded. If you load the licenses on multiple switches and then set up a stack system, the features activated for the stack are a combination of features activated for the member switches. If a license is uploaded to only one of the two switches, the license is valid for the stack system. If the stack system splits, the licenses loaded to the switches respectively take effect. In addition, the activated licensed features can still be used on the switches even if these features are not activated using the switches' own license. If the license of Switch1 supports feature A and the license of Switch2 supports feature B, the two switches support features A and B after they set up a stack. If the stack breaks, feature B on Switch1 can still run even after Switch1 restarts but new configurations cannot be added to feature B.

For CE switches, should a license file be loaded before or after a stack is set up
You can load license files for switches before or after setting up a stack. The result is not affected by the operation sequence.

How do I calculate the number of power modules required on a CE switch
Description
How do I calculate the number of power modules required on a CE switch?
Solution
Calculate the total power consumption of all working modules on the switch and divide this value with the maximum power that a power module can provide. Add 1 to the integer part of the calculation result. The sum N is minimum number of power modules required for the switch. In real-world applications, more than N power modules are configured to implement power redundancy. The power modules can work in N+1 or N+N backup mode.
For example, a CE12808 chassis uses 2700 W AC power modules and is configured with two 48*10GE interface cards, five CE-SFU08A cards, and two MPUs.
With this configuration, the maximum power consumption of the chassis is 2455 W. 2455 W divided by 2700 W is smaller than 1, so the integer part is 0. That is, a minimum of one power module is required (0 + 1 = 1). Considering power redundancy, the number of power modules used on the chassis is:
In N+1 backup mode: N + 1 = 1 + 1 = 2
In N+N backup mode: N + N = 1 + 1 = 2
For details, visit http://support.huawei.com/onlinetoolsweb/network_configtool/index.jsp?lang=en&audience=enterprise

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