Task 2: Change the Default IP Address Base (Optional)

You may need to change the default IP address base of the XC private networks if the default values conflict with another IP address base at your site.

Follow this optional procedure to change the default IP address base for the XC private networks:

Begin this procedure as the root user on the head node.
Use the text editor of your choice to edit the /opt/hptc/config/base_addr.ini file.
The default contents of this file looks like this:
Base = 172 nodeBase = 172.20 cpBase = 172.21 swBase = 172.20.65 icBase = 172.22 otherBase = 172.23.0 netMask = 255.224.0.0
The following describes the parameters in this file:
Base
The common first octet that is used for all base IP addresses.
nodeBase
The base IP address of all nodes.
cpBase
The base IP address of the console branch.
swBase
The base IP address of the Ethernet switches. The interconnect switch modules are based off of this value, 172.20.66.*.
icBase
The base IP address of the interconnect.
otherBase
The base IP address to be used for other devices. This value is currently not used by the discovery process.
netMask
The netmask that is used for all connections on the administration network.
Any changes you make to this file must follow these guidelines:
- You can change only the first octet of a base address; 172 is the default.
- All base IP addresses must use the same first octet.
- You must use a private domain as defined by the RFC.
Save your changes and exit the file. Because this is a read-only file, the method by which you save the file depends upon the text editor you used.
For example, if you are using the vi text editor, use :w! to save changes to a read-only file.

Proceed to “Task 3: Run the cluster_prep Command to Prepare the System” to begin the discovery process.

Task 2: Change the Default IP Address Base (Optional)

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