Unable to allocate the required address spaces

Question

While deploying a new Web Role on Windows Azure i am getting this error: Unable to allocate the required address spaces for the deployment in a new or predefined subnet that is contained within the specified virtual network. I have searched for a solution, but didn't find one. Does any one have an idea?

My cscfg file looks like this:

<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration serviceName="Application.Cloud" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="3" osVersion="*" schemaVersion="2013-03.2.0">
  <Role name="WebApplication" vmName="vm001">
    <Instances count="1" />
    <ConfigurationSettings>
        ...
    </ConfigurationSettings>
    <Certificates>
      <Certificate name="Microsoft.WindowsAzure.Plugins.RemoteAccess.PasswordEncryption" thumbprint="..." thumbprintAlgorithm="sha1" />
    </Certificates>
  </Role>
  <Role name="Application.ServiceOpdrachten" vmName="vm002">
    <Instances count="1" />
    <ConfigurationSettings>
      ...
    </ConfigurationSettings>
    <Certificates>
      <Certificate name="Microsoft.WindowsAzure.Plugins.RemoteAccess.PasswordEncryption" thumbprint=".." thumbprintAlgorithm="sha1" />
    </Certificates>
  </Role>
  <NetworkConfiguration>
    <VirtualNetworkSite name="VirtualNetwork" />
    <!-- The virtual network name must match the name of the vvirtual network configured in your subscription. -->
    <AddressAssignments>
      <!-- You must map each role in your cloud service to a subnet or a collection of subnets which were defined in your network.-->
      <InstanceAddress roleName="WebApplication">
        <Subnets>
          <Subnet name="Subnet-1" />
        </Subnets>
      </InstanceAddress>
    </AddressAssignments>
  </NetworkConfiguration>
</ServiceConfiguration>

In the same cloudproject i have another instance that deploys fine.

<?xml version="1.0" encoding="utf-8"?>
<ServiceConfiguration serviceName="Ecare.Acasa.Cloud" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="3" osVersion="*" schemaVersion="2013-03.2.0">
  <Role name="WebApplication">
    <Instances count="1" />
    <ConfigurationSettings>
      ...
    </ConfigurationSettings>
    <Certificates>
      <Certificate name="Microsoft.WindowsAzure.Plugins.RemoteAccess.PasswordEncryption" thumbprint="..." thumbprintAlgorithm="sha1" />
    </Certificates>
  </Role>
  <Role name="Ecare.Acasa.ServiceOpdrachten">
    <Instances count="1" />
    <ConfigurationSettings>
      ...
    </ConfigurationSettings>
    <Certificates>
      <Certificate name="Microsoft.WindowsAzure.Plugins.RemoteAccess.PasswordEncryption" thumbprint="..." thumbprintAlgorithm="sha1" />
    </Certificates>
  </Role>
  <NetworkConfiguration>
    <VirtualNetworkSite name="Ecare" />
    <!-- The virtual network name must match the name of the vvirtual network configured in your subscription. -->
    <AddressAssignments>
      <!-- You must map each role in your cloud service to a subnet or a collection of subnets which were defined in your network.-->
      <InstanceAddress roleName="WebApplication">
        <Subnets>
          <Subnet name="Subnet-1" />
        </Subnets>
      </InstanceAddress>
    </AddressAssignments>
  </NetworkConfiguration>
</ServiceConfiguration>

Answer 1

We had the same problem around three months ago. Back then may be after some update, the new IP Addresses were not being assigned, or when role or vm were deleted their IP address were not reusable.

We were not able to take help from Microsoft Support, as it was in Preview.

What worked for us was: We deleted the whole virtual network, and created it again.

If it is possible for you, see if it works.