IBM RS/6000 SP, Problem Determination Manual

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This soft copy for use by IBM employees only.
Appendix C. IP Address and Hostname Changes for the SP
This information describes the activities that the admin user needs to execute
when changing the IP address or hostname for the RS/6000 SP nodes and
Control Workstation (CW). It is highly recommended to avoid making any IP
address or hostname changes if possible. The tasks are strenuous and in some
cases require re-execution of the installation steps.
The changing of the IP addresses/hostnames of RS/6000 SP nodes affect the
whole RS/6000 SP system. IP addresses/hostnames are located in the System
Data Repository (SDR) working with objects and attributes.
IP addresses/hostnames are also kept in various files that are located on the
RS/6000 SP nodes and the CW. These changes will also cause problems with
Network Installation Manager (NIM) and System Partition objects and
configuration files on your RS/6000 SP system.
C.1 SDR Objects
The SDR objects that reference the hostname and IP address changes are :
Adapters Deals with ent, css0, tr0, fi0 IP addresses and
adapters.
Frame Deals with the MACN CWS attribute and works with
hostnames.
Node Works with initial/reliable hostnames and uses the
IP address for boot servers. Node objects are
organized in system partitions.
SP Deals mostly with CW attributes, but uses hostname
when working with ntp, printing, user management,
and accounting.
SP_ports Deals with hostname used with hardmon and CW.
Switch_partition Works with hostname of primary node used with
switch.
JM_domain,Pool Works with Resource Manager and references
hostnames.
Syspar Deals with IP address and SP_NAME used with
system partitions.
C.2 RS/6000 SP System Files
The following are files that contain IP addresses, or hostnames that exist on
RS/6000 SP nodes and the CW. It is best to look through these files when
completing the procedures for changing hostnames and IP addresses for your
RS/6000 SP system.
/.rhosts Contains hostnames used exclusively with rcmd
services
/.klogin Contains hostnames used with authentication
rcmd services
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Copyright IBM Corp. 1996
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