cloudstack/docs/en-US/add-remove-nic.xml

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<section id="add-remove-nic">
  <title>Reconfiguring  Networks in VMs</title>
  <para>&PRODUCT; provides you the ability to move VMs between networks and reconfigure a VM's
    network. You can remove a VM from a  network and add to a new  network. You can
    also change the default  network of a virtual machine. With this functionality, hybrid
    or traditional server loads can be accommodated with ease. </para>
  <para>This feature is supported on XenServer and KVM hypervisors.</para>
  <para>The following APIs have been added to support this feature. These API calls can function
  only while the VM is in running or stopped state.</para>
  <section id="prereq-addnic">
    <title>Prerequisites</title>
    <para>Ensure that vm-tools are running on guest VMs for adding or removing networks to work on VMware hypervisor.</para>
  </section>
  <section id="addnic">
    <title>addNicToVirtualMachine</title>
    <para>The addNicToVirtualMachine API adds a new NIC to the specified VM on a selected
      network.</para>
    <informaltable>
      <tgroup cols="3" align="left" colsep="1" rowsep="1">
        <thead>
          <row>
            <entry><para>parameter</para></entry>
            <entry><para>description</para></entry>
            <entry><para>Value</para></entry>
          </row>
        </thead>
        <tbody>
          <row>
            <entry><para>virtualmachineid</para></entry>
            <entry><para>The unique ID of the VM to which the NIC is to be added. </para></entry>
            <entry><para>true</para></entry>
          </row>
          <row>
            <entry><para>networkid</para></entry>
            <entry><para>The unique ID of the network the NIC that you add should apply
              to.</para></entry>
            <entry><para>true</para></entry>
          </row>
          <row>
            <entry><para>ipaddress</para></entry>
            <entry><para>The IP address of the VM on the network.</para></entry>
            <entry><para>false</para></entry>
          </row>
        </tbody>
      </tgroup>
    </informaltable>
    <para>The network and VM must reside in the same zone. Two VMs with the same name cannot reside
      in the same network. Therefore, adding a second VM that duplicates a name on a network will
      fail.</para>
  </section>
  <section id="removenic">
    <title>removeNicFromVirtualMachine</title>
    <para>The removeNicFromVirtualMachine API removes a NIC from the specified VM on a selected
      network.</para>
    <informaltable>
      <tgroup cols="3" align="left" colsep="1" rowsep="1">
        <thead>
          <row>
            <entry><para>parameter</para></entry>
            <entry><para>description</para></entry>
            <entry><para>Value</para></entry>
          </row>
        </thead>
        <tbody>
          <row>
            <entry><para>virtualmachineid</para></entry>
            <entry><para>The unique ID of the VM from which the NIC is to be removed.
              </para></entry>
            <entry><para>true</para></entry>
          </row>
          <row>
            <entry><para>nicid</para></entry>
            <entry><para>The unique ID of the NIC that you want to remove.</para></entry>
            <entry><para>true</para></entry>
          </row>
        </tbody>
      </tgroup>
    </informaltable>
    <para>Removing the default NIC is not allowed.</para>
  </section>
  <section id="defaultnic">
    <title>updateDefaultNicForVirtualMachine</title>
    <para>The updateDefaultNicForVirtualMachine API updates the specified NIC to be the default one
      for a selected VM.</para>
    <para>The NIC is only updated in the database. You must manually update the default NIC on the
      VM. You get an alert to manually update the NIC. </para>
    <informaltable>
      <tgroup cols="3" align="left" colsep="1" rowsep="1">
        <thead>
          <row>
            <entry><para>parameter</para></entry>
            <entry><para>description</para></entry>
            <entry><para>Value</para></entry>
          </row>
        </thead>
        <tbody>
          <row>
            <entry><para>virtualmachineid</para></entry>
            <entry><para>The unique ID of the VM for which you want to specify the default NIC.
              </para></entry>
            <entry><para>true</para></entry>
          </row>
          <row>
            <entry><para>nicid</para></entry>
            <entry><para>The unique ID of the NIC that you want to set as the default
              one.</para></entry>
            <entry><para>true</para></entry>
          </row>
        </tbody>
      </tgroup>
    </informaltable>
  </section>
</section>