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Config to be preserved before we upgrade esxi 4.1 to 5.1

I am upgrading my existing Esxi 4.1 to 5.1...have some queries regarding config to be preserved ..

1. we are using syslog server for esxi 4.1 ,is there something we have to check before upgrading host or we have to apply after host upgrade ?

2.form where we have to locate/set sys log config on esxi 4.1 and 5.1

3.any other config we have to preserver before upgrading host which we have to configure again after host is upgraded to 5.1?

like NTP Config,log rotation, security hardening in esxi,San related/Network related ...
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Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)
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If you complete an upgrade, the upgrader installer will try and preserve existing settings.

But please make sure you have these settings documented, in case you need to reapply them after the upgrade.
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i can see after upgrade logs are not going to syslog server , where i have to check for syslog config on my esxi 5.1 ?

where to check for firewall rules in esxi 4.1/5.1 ?
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esxcli network firewall get  -output for this command on esxi 5.1..

esxcli network firewall get
   Default Action: DROP
   Enabled: true
   Loaded: true

how to check this in esxi 4.1 ?

and for syslog.conf..
in esxi 4.1...

/etc # cat syslog.conf
logfile=/vmfs/volumes/88888888-999999999-0000-e4e4e4e4e4e4/log/messages
loghost=192.168.1.15

while on esxi 5.1

esxcli system syslog config get
   Local Log Output: /scratch/log
   Local Logging Default Rotation Size: 1024
   Local Logging Default Rotations: 8
   Log To Unique Subdirectory: false
   Remote Host: 192.168.1.15

please advice what else to be checked/configured, as after upgrade no logs going to sys log server?
check advanced settings, in ESXi with vSphere Client, to check Syslog Server IP Address is correct.
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yes , that ip is as same as it was on esxi 4.1,but no logs there on syslog server after upgrade
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firewall status..on esxi 5.1

esxcli network firewall get
   Default Action: DROP
   Enabled: true
   Loaded: true

how to check for syslog status in firewall?
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yes, this one  i have already dy done and reloaded the syslog service as well

anything i have to check/configure

i can see Path shwoing for scratch/log is different on each host..is that soemthing we have to configure ?

i mean to check for remote data store where logs should be deliverd ?
are the IP Addresses correct ?

scratch/log should not matter.
Are you able to ping the syslog server? or telnet to the appropriate ports?
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ASKER

Thanks