Monday, 15 April 2013

HMC Tips VIII - DLPAR Requirements

1. What is version requirment for DLPAR operations ?

a. A P4 processor based pSeries system or later
b. October 2002 or later system microcode update
c. A HMC at version R3V1.0 or later
d. AIX 5L Version 5.2 or later

2. What are the AIX filesets required for DLPAR ?

a. # lslpp -l rsct.core*
b. # lslpp -l csm.client

3. What are the daemons required for DLPAR ?

#lssrc -a | grep rsct
ctrmc rsct 21044 active
IBM.CSMAgentRM rsct_rm 21045 active
IBM.ServiceRM rsct_rm 11836 active
IBM.DRM rsct_rm 20011 active
IBM.HostRM rsct_rm 20012 active
IBM.DMSRM rsct_rm 906 active
IBM.LparCmdRM rsct_rm 901 active

4. On HMC, how to list partitions recognized by DLAPR ?

# lspartition -dlpar

If all active AIX 5.2 partitions are listed as Active<1>, ..., DCaps:<0xf> your system has been set up properly for DLPAR.
If you're missing some active partitions or some partitions are reported as Active<0>, your system probably still has a network/hostname set up problem.

5. How to resolve name resolution issues between LPARs and HMC ?

Step I :
# vi /etc/resolv.conf
1.Same DNS server for LPARs and HMC
2.Remove the duplicate entries.

Step II:
Please check to see the that ct_node_id is unique for each node in the environment:
"cat /var/ct/cfg/ct_node_id"\

If duplicate ct_node_id values are found issue a recfgct on the problem node(s) to have a new/unique ct_node_id generated.
# /usr/sbin/rsct/install/bin/recfgct

(This command will start/restart ctcas,ctrmc system and will generate a new id in the file /var/ct/cfg/ct_node_id )

Step III:
ping from aix.

Step IV:
Please also do the following steps on the LPAR(s) to refresh RMC subsystem
/usr/sbin/rsct/bin/rmcctrl -z ----> Stops the RMC subsystem and all resource managers.
/usr/sbin/rsct/bin/rmcctrl -A ----> Adds and starts the RMC subsystem
/usr/sbin/rsct/bin/rmcctrl -p ----> Enables remote client connections

Step V:
Ensure /var directory is not 100% full
After expanding the /var directory, execute the following command.
# /usr/sbin/rsct/bin/rmcctrl -z
# rm /var/ct/cfg/ct_has.thl
# rm /var/ct/cfg/ctrmc.acls
# /usr/sbin/rsct/bin/rmcctrl -A

Step VI:
If problem still persists, please run the below command to collect the DLPAR log in /tmp/ctsupt:
# /usr/sbin/rsct/bin/ctsnap

6. How to find the parent device of a device like cdrom in AIX ?

# lsdev -Cl cd0 -F parent

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