Error Messages Encountered when Configuring a Stacking Trunk

The following error messages may occur when you configure a trunk on a RUCKUS ICX stack:

If you form a multi-trunk connection on two sets of stack ports that are not directly connected on neighboring units, the multi-stack-trunk command is rejected, and an error message similar to the follow example is displayed.
```
Error! 1/2/3 has no connection. Please use "stack-trunk".
```

When a unit joins or leaves a stack, or a stack trunk is configured using the stack-trunk command, a stack election is triggered. The multi-stack-trunk command triggers a stack election among the stack units and reprograms (or removes) the stack trunk port in the hardware. A timer is set on all units to coordinate a stack election. Traffic is generally interrupted for less than 5 seconds for the system to detect the port down event and reprogram hardware. You must wait for the stack election to be completed before entering another command. If you do not wait for the stack election to finish, the following warning message is displayed.
```
Stack port or trunk change is in progress, please try later.
```

You cannot enter the stack switch-over command until the stack election is completed or until the multi-stack-trunk command configuration is complete. If you enter the stack switch-over command too early, the following warning message is displayed.
```
Please try later, reason: during stack port or trunk deployment.
```