Address Space/Range issue with Virtual Network, Subnet and Gateway Subnet on Azure

Hi,


I am facing troubles with address space/range issue as follows.


While creating a virtual network on Azure, it asks for

Virtual Network name,
Address space,
Subnet name and
Address range.

Keeping in mind for creating two subnets in a virtual network, I filled information as


Address space: x.0.0.0/28 (for 16 addresses x.0.0.1 - x.0.0.15)
Address range: x.0.0.0/29 (for 8 addresses x.0.0.0 - x.0.0.7)


Virtual network created successfully.


While creating the Gateway Subnet, I am unable to understand what address range should I use here.


I see following errors.


Your subnet is not contained within the address space for this virtual network: x.0.0.0/28. and

The specified address space overlaps with subnet 'default' which has a range of 'x.0.0.0/28'.


I deleted virtual network and created another virtual network as follows


Address space: x.0.0.0/24 (for 256 addresses x.0.0.0 - x.0.0.256)
Address range: x.0.0.0/24 (for 256 addresses x.0.0.0 - x.0.0.256)


Virtual network created successfully.


While creating the Gateway Subnet, I see the same error message as above.


Please be kind to fix this issue.

Regards
InTechSys

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InTechSys