Imvedansh opened a new issue, #10615:
URL: https://github.com/apache/cloudstack/issues/10615
**Description**
When attempting to create a new network tier within a VPC via the UI
(Network → VPC → <Your VPC> → Networks → Add Tier),
the form does not display the parent VPC CIDR.
As a result, users are forced to cancel the form, go back to the VPC details
page, copy the CIDR, then return to the "Add Network" form to paste it in. This
creates a disruptive and unnecessary UX loop, especially for users managing
multiple VPCs or subnets.
**Steps to Reproduce**
Go to the Network section.
Select the VPC tab.
Create a VPC (e.g., with CIDR 10.0.0.0/16).
After it's created, click on that VPC (VPC1) to open its details.
In the Networks subsection, click “Add Tier” (or “Add Network”).
In the form, notice there's no visibility of the parent VPC’s CIDR.
**Issue for Users**
The CIDR field must match a subnet within the VPC CIDR.
Since the VPC CIDR isn't shown in the form, the user has to:
Close the form
Go back to the VPC details
Copy the VPC CIDR
Return to the "Add Network" form
Paste it to ensure they’re entering a valid subnet
**Suggestion / Fix->**
When a user clicks “Add Network” (to create a tier in a VPC):
The form should read the parent VPC CIDR
Automatically suggest a default CIDR, Gateway IP, and Netmask based on
available space
Pre-fill:
this.form.gateway
this.form.netmask
Like in the Screenshot below
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