VCS freeze and unfreeze on AIX

VCS freeze and unfreeze on AIX

Thanks 

:)

Resource group switch and online and offline on AIX VCS cluster

Resource group switch and online and offline on AIX VCS cluster

Helpful command hagrp, hastatus.

Command usefull during DR .

Thanks

:)

AIX HACMP script to monitor cluster resource group health

Shell script to monitor AIX cluster health

while true

do

clrginfo

lssrc -ls clstrmgrES |grep -i state

Sleep 5

done

It show RG status and cluster is in stable or not.

Thanks !!!

:)

How to access LPAR from HMC console

How To access AIX LPAR VIO inside power server frame using HMC command line console.

1.Login to HMC using IP address or FQDN

2. Enter following command

#vtmenu

1.powerframe1

2.powerframe2

3.powerframe3

This command will display all POWER frame connected to this HMC, enter number of a frame which you wanted to access.

3. if AIX admin wanted to see list of AIX LPAR and VIO inside powerframe6, he must enter number 6

output:

hscroot@hmc> vtmenu

 Retrieving name of managed system(s) . . . 

 ----------------------------------------------------------

  Managed Systems:

 ----------------------------------------------------------

1)powerframe1

2)powerframe2

3)powerframe3

 Enter Number of Managed System.   (q to quit): 1

 ----------------------------------------------------------

  Partitions On Managed System:  powerframe1

 ----------------------------------------------------------

   1)    lpar1                              Running

   2)    lpar2                              Running

   3)    lpar3                              Running

   4)    lpar4                              Running

   5)    lpar5                              Running

Enter user name : root

Enter password :XXXXXXXX

lpar1#

===============================================================

now AIX admin can access AIX LPAR using entering number. In this case AIX admin wanted to access

lpar1 so here he entered 1.

once entered AIX admin can login using root password.

AIX admin can exit from lpar1# console using following sequence of steps.

    

1.

lpar1# exit

once exited from # prompt,

IBM AIX LPAR 

login: ~.

Terminate session [y/n]: y

once AIX admin pressed yes it will exit AIX lpar1 session.

**AIX admin must press ~ first and then . to exit AIX lpar1 session.

~.  (tilt +dot)  //key combination

Thanks !!!!

:)

Add Alias IP address to AIX server ethernet interface using chdev command

 Hello All,

Today topic is Alias IP configuration on ethernet interface.

Scenario 1:

Alias IP configuration on en0 using chdev with permanent/temporary.

Command for assigning alias IP on en0 interface permanently is like following.

#chdev -l en0 -a alias4=192.168.0.100,255.255.255.0

This will add IP address 192.168.0.100 as Alias IP to en0 interface. AIX admin can verify this using command

#ifconfig -a 

Chdev command permanently set IP to interface en0. this alias IP address remain on AIX interface after reboot also.

    Let's consider scenario where AIX admin wanted to set IP address for temporary purpose, he can use following command 

#ifconfig en0 192.168.1.3 netmask 255.255.255.0 alias

Scenario 2:

If AIX admin wanted to remove that alias IP, how he can remove that??

Answer:

Remove a permanently added alias from an interface

chdev -l en0 -a delalias4=192.168.1.3,255.255.255.0

Another useful command for adding default route on AIX server

#route add default 192.168.1.1

Here I am sharing small script to check whether AIX server ethernet interface are pingable or not

============================================================

for i in `ifconfig -a |grep -i inet |awk '{print $2}'`

do

echo $i

ping -c 10  $i

done

Above script will ping to IP address assigned to interface, if they up and active will get ping response.

Thanks!!!!

:)

Execute AIX mksysb in background with nohup utility

 Hello All,

Today i am writing this blog to show how AIX Admin can Execute AIX mksysb backup using "nohup" utility and monitor logs using tail command.

                        AIX Mksysb                                 

This method is usefull to get logs of AIX mksysb backup command

#nohup mksysb -ieX /backup/Aixlpar.mksysb &

Above command will generate 1 process id and run this command in background, also create nohup.out file,where all logs for above command will logged. If above mksysb backup command fails,AIX admin can review nohup.out file and take correct action to solve issue.

Command to monitor logs in "nohup.out"   // nohup.out will genrate in same path from where AIX admin executed mksysb command.

#tail -f nohup.out

Some other useful command for taking AIX server mksysb backup are :

Create a mksysb backup of the rootvg volume group

 #mksysb -i /mnt/Aixlpar.mksysb.`hostname`_`date +%m%d%y`

Above command will create backup with servername and time,date and year format.

Thanks !!!

:)

Script for enabling failed vscsi and fscsi path on AIX client .

 Hello All,

Today will share small script which tested and used for enabling failed path on AIX client LPAR.

sometime AIX admin needs to take reboot of VIO server for maintenance activity, when AIX admin reboot 1 VIO server out of 2 then 1 VSCSI or FSCSI path become failed. once VIO is up and active sometime AIX admin observe that after VIO up some path still in failed state. AIX admin can try following script to enable those path

Scenario: Script to enable only failed path

for s in `lspath |grep -i failed|awk '{print $2}'`

do

chpath -l $s -p `lspath -l $s |grep -i failed|awk '{print $3}'` -s Enabled

sleep 2

done

To confirm whether any path on VIO server is failed or not

#lspath |grep -i failed

Thanks  !!!

:)