erikbocks opened a new pull request, #10983:
URL: https://github.com/apache/cloudstack/pull/10983

   ### Description
   
   This PR fixes and enhances the validation of the values inserted in the 
VLAN/VNI field when configuring a new zone. Currently, it only checks if any of 
the fields are empty and if the range start value is greater than the range end 
value. Thus, it is possible to insert invalid values, as negatives.
   
   With the PR changes, now the field validates if: any of the values is 
negative, any of the fields is empty or if the inserted values are inside the 
isolation method max and min values. The maximum and minimum values are now 
defined based on the selected isolation method (isolation method limits used 
can be find in the `NetworkServiceImpl` class). This PR also fixes a minor 
graphical issue, where the field displayed a red check icon, instead of a red 
error icon.
   
   ### Types of changes
   
   - [ ] Breaking change (fix or feature that would cause existing 
functionality to change)
   - [ ] New feature (non-breaking change which adds functionality)
   - [ ] Bug fix (non-breaking change which fixes an issue)  <!-- seria bug 
fix? -->
   - [X] Enhancement (improves an existing feature and functionality)
   - [ ] Cleanup (Code refactoring and cleanup, that may add test cases)
   - [ ] build/CI
   - [ ] test (unit or integration test code)
   
   ### Feature/Enhancement Scale or Bug Severity
   
   #### Feature/Enhancement Scale
   
   - [ ] Major
   - [X] Minor
   
   ### Screenshots (if appropriate):
   
   Before the changes:
   
![image](https://github.com/user-attachments/assets/8229ba37-087a-4c06-9482-98e8d92fe821)
   
   After the changes:
   
![image](https://github.com/user-attachments/assets/9f846558-37f2-4c52-abc2-e1a6bcc8fb3b)
   
   ### How Has This Been Tested?
   
   1. Simulated the creation of a new zone, then validated the fix with the 
following tests:
   
   <details><summary>VLAN</summary>
   
   |      Test    | Start |  End |   Valid   |
   |:---------------:|:------:|:----:|:----------:|
   |      Empty     |  Null  | Null |    False   |
   |  Negative value |   -10  |  100 |    False   |
   |      Equal     |   100  |  100 |    False   |
   |   Start > End  |   100  |  10  |    False   |
   |   End > Limit  |    1   | 4096 |    False   |
   | Start < Limit |    0   |  100 |    False   |
   |      Valid     |    1   |  100 | True |
   
   </details>
   
   <details><summary>VXLAN</summary>
   
   |      Test    | Start |    End   |   Valid   |
   |:---------------:|:------:|:--------:|:----------:|
   |      Empty     |  Null  |   Null   |    False   |
   |  Negative value |  -4090 |   4100   |    False   |
   |      Equal     |  4096  |   4096   |    False   |
   |   Start > End  |  4100  |   4096   |    False   |
   |   End > Limit  |  4096  | 16777215 |    False   |
   | Start < Limit |  4095  |   4100   |    False   |
   |      Valid     |  4096  |   4100   | True |
   
   </details>
   
   <details><summary>GRE</summary>
   
   |      Test    | Start |     End    |   Valid   |
   |:---------------:|:------:|:----------:|:----------:|
   |      Empty     |  Null  |    Null    |    False   |
   |  Negative value |   -10  |     100    |    False   |
   |      Equal     |   100  |     100    |    False   |
   |   Start > End  |   100  |     99     |    False   |
   |   End > Limit  |    1   | 4294967296 |    False   |
   | Start < Limit |   -1   |     100    |    False   |
   |      Valid     |    1   |    4000    | True |
   
   </details>


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