Set static BMC IP using dhcp provided IP address
================================================

The following example outlines the MTMS based hardware discovery for a single IPMI-based compute node.  

+------------------------------+------------+
| Compute Node Information     | Value      |
+==============================+============+
| Model Type                   | 8247-22l   |
+------------------------------+------------+
| Serial Number                | 10112CA    |
+------------------------------+------------+
| Hostname                     | cn01       |
+------------------------------+------------+
| IP address                   | 10.1.2.1   |
+------------------------------+------------+

The BMC IP address is obtained by the open range dhcp server and the plan is to leave the IP address the same, except we want to change the IP address to be static in the BMC. 

+------------------------------+------------+
| BMC Information              | Value      |
+==============================+============+
| IP address - dhcp            | 172.30.0.1 |
+------------------------------+------------+
| IP address - static          | 172.30.0.1 |
+------------------------------+------------+


#. **Pre-define** the compute nodes:

   Use the ``bmcdiscover`` command to help discover the nodes over an IP range and easily create a starting file to define the compute nodes into xCAT.

   To discover the compute nodes for the BMCs with an IP address of 172.30.0.1, use the command: ::

      bmcdiscover --range 172.30.0.1 -z > predefined.stanzas

   The discovered nodes have the naming convention:  node-<*model-type*>-<*serial-number*> ::

      # cat predefined.stanzas
      node-8247-22l-10112ca:
        objtype=node
        groups=all
        bmc=172.30.0.1
        cons=ipmi
        mgt=ipmi
        mtm=8247-22L
        serial=10112CA


#. Edit the ``predefined.stanzas`` file and change the discovered nodes to the intended ``hostname`` and ``IP address``. 

    #. Edit the ``predefined.stanzas`` file: ::

         vi predefined.stanzas

    #. Rename the discovered object names to their intended compute node hostnames based on the MTMS mapping: ::

         node-8247-22l-10112ca ==> cn01

    #. Add a ``ip`` attribute and give it the compute node IP address: ::

          ip=10.1.2.1

    #. Repeat for additional nodes in the ``predefined.stanza`` file based on the MTMS mapping.


    In this example, the ``predefined.stanzas`` file now looks like the following: ::

        # cat predefined.stanzas
        cn01:
          objtype=node
          groups=all
          bmc=172.30.0.1
          cons=ipmi
          mgt=ipmi
          mtm=8247-22L
          serial=10112CA
          ip=10.1.2.1 


#. Set the chain table to run the ``bmcsetup`` script, this will set the BMC IP to static. ::

       chdef cn01 chain="runcmd=bmcsetup"

#. Define the compute nodes into xCAT: ::

       cat predefined.stanzas | mkdef -z 

#. Add the compute node IP information to ``/etc/hosts``: ::

       makehosts cn01

#. Refresh the DNS configuration for the new hosts: ::

       makedns -n 

#. **[Optional]**  Monitor the node discovery process using rcons

   Configure the conserver for the **predefined** node to watch the discovery process using ``rcons``::

       makeconservercf cn01

   In another terminal window, open the remote console: ::

       rcons cn01

#. Start the discovery process by booting the **predefined** node definition: ::

       rsetboot cn01 net
       rpower cn01 on

#. The discovery process will network boot the machine into the diskless xCAT genesis kernel and perform the discovery process. When the discovery process is complete, doing ``lsdef`` on the compute nodes should show discovered attributes for the machine.  The important ``mac`` information should be discovered, which is necessary for xCAT to perform OS provisioning. 

