Duplicate IP address makes PowerHA ( HACMP ) down


 
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Operating Systems AIX Duplicate IP address makes PowerHA ( HACMP ) down
# 1  
Old 01-03-2010
Duplicate IP address makes PowerHA ( HACMP ) down

Hello,

I would like to know if anyone has faced this problem. Whenever there is a duplicate IP address, HACMP goes down infact HACMP ( PowerHA ) takes the whole system down.

Does anyone know how to solve this problem ?
# 2  
Old 01-03-2010
Quote:
Originally Posted by filosophizer
Hello,

I would like to know if anyone has faced this problem. Whenever there is a duplicate IP address, HACMP goes down infact HACMP ( PowerHA ) takes the whole system down.

Does anyone know how to solve this problem ?
Just avoid the duplicate IP.
# 3  
Old 01-03-2010
the problem occurs only if someone hijacks the service IP address...

is there a way i can disable in HACMP config that if there is a duplicate ip do not shutdown the system ?
Duplicate IP After reboot

---------- Post updated at 12:18 PM ---------- Previous update was at 10:49 AM ----------
on another machine, there is another strange thing going on:
Code:
# errpt|more
   IDENTIFIER TIMESTAMP  T C RESOURCE_NAME  DESCRIPTION
   1B3F9565   0103192710 P S usbhc1         SOFTWARE ERROR
   AFA89905   0103192610 I O grpsvcs        Group Services daemon started
   923E1911   0103192610 P S topsvcs        Failed to open NIM connection
   97419D60   0103192610 I O topsvcs        Topology Services daemon started
   A6DF45AA   0103192410 I O RMCdaemon      The daemon is started.
   51E537B5   0103192410 P H sysplanar0     platform_dump saved to file
   D221BD55   0103192410 I O perftune       RESTRICTED TUNABLES MODIFIED AT REBOOT
   291D64C3   0103192410 I H sysplanar0     Platform dump data
   2BFA76F6   0103192110 T  S SYSPROC         SYSTEM SHUTDOWN BY USER
   9DBCFDEE   0103192410 T O errdemon       ERROR LOGGING TURNED ON
   FE2DEE00   0103191110 P S SYSXAIXIF      DUPLICATE IP ADDRESS DETECTED IN THE NET
   BC3BE5A3   0103191110 P  S SRC             SOFTWARE PROGRAM ERROR
   BA431EB7   0103191110 P  S SRC             SOFTWARE PROGRAM ERROR
   12081DC6   0103191110 P S haemd          SOFTWARE PROGRAM ERROR
   64368504   0103191110 P O grpsvcs        Connection failure between Group Service
   6D19271E   0103191110 I O topsvcs        Topology Services daemon stopped
   AA8AB241   0103191110 T O OPERATOR       OPERATOR NOTIFICATION
   BC3BE5A3   0103191110 P  S SRC             SOFTWARE PROGRAM ERROR
   AA8AB241   0103191110 T O clstrmgrES     OPERATOR NOTIFICATION
   F7FA22C9   0102122210 I O SYSJ2          UNABLE TO ALLOCATE SPACE IN FILE SYSTEM
   F7FA22C9   0101161810 I O SYSJ2          UNABLE TO ALLOCATE SPACE IN FILE SYSTEM
   4BE53A52   0101150010 P O dumpcheck      Livedump filesystem almost full

HACMP resources were not moved since the system went into non-responsive state and only when one system was manually switched off resources were moved to another server. Manually switched off from the panel.

Last edited by Scott; 01-03-2010 at 04:38 PM.. Reason: Code tags please
# 4  
Old 01-04-2010
Quote:
Originally Posted by filosophizer
the problem occurs only if someone hijacks the service IP address...
Exactly. However, preventing sbdy else using your Service Label is way out of scope for PowerHA. This task must be resolved by the server or network administrators. Hint: use the MAC address to identify the adapter that is also using the Service Label. The network guys should be able to tell you at least on what switch the other machine is connected to.

Quote:
Originally Posted by filosophizer
is there a way i can disable in HACMP config that if there is a duplicate ip do not shutdown the system ?
Not really as PowerHA works as designed here. In fact it is trying to protect your application's data from getting corrupted by being accessed from two different servers simultaneously. If you want to run PowerHA in an unstable environment it would be better to not use PowerHA at all instead of fiddling around with the cluster scripts.
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