I am planning to disable SNMP in our AIX LPARs. wanted to see by disabling in a test LPAR.
before that, I would like to check disabling this SNMP will impact any of our application or database in anyway. what kind of other software depends on these SNMP daemons ?
Can you please let me know the exact use of SNMP in AIX. I understand that SNMP is used to collect information about network connected servers/routes/devices etc. (will it affect NFS file systems ? )
ours is a small shop. we never used SNMP config files to setup anything specially.
[root@testlpar]/root>which snmpd
/usr/sbin/snmpd
[root@testlpar]/root>ls -ltr /usr/sbin/snmpd
lrwxrwxrwx 1 root system 9 Jan 07 2015 /usr/sbin/snmpd -> snmpdv3ne
lrwxrwxrwx 1 root system 8 Jan 07 2015 /usr/sbin/clsnmp -> clsnmpne
[root@testlpar]/home/tesusr>cd /etc/snmp
snmpd.boots snmpd.conf snmpd.peers snmpdv3.conf snmpinterfaces/ snmpmibd.conf
when we installed AIX 71, SNMP v3 non-encrypted version came along with it. please see details below. we never had an opportunity use SNMP agents/server for any purpose.
Subsystem Group PID Status
aixmibd tcpip 3121214 active
hostmibd tcpip 3232324 active
snmpmibd tcpip 3323232 active
snmpd tcpip 3212121 active
Please let me know disabling SNMP related daemons or services will cause any issues. thank you.
As I mentioned earlier, ours is a small shop. AIX is not a primary/core OS in our environment.We do not have POWERHA/HACMP and We do not have any monitoring tool for AIX. Instead we use scripts for monitoring very few servers.
we never modified any of the SNMP config files after OS installation to support application.
This suggests that you do not need SNMP, but to finally answer that question you simply will have to try.
No, it doesn't. I haven't installed AIX from scratch for a long time and i am not sure what the installation default of the SNMP-daemons is, but you can simply test that:
lssrc -a | grep -e snmp -e mib
You may eventually see 4 running daemons: snmpd, aixmibd, hostmibd and snmpmibd. If so: SNMP is active. If not: then not. (duh )
If it is active: shut them offf via the SRC. The command is stopsrc -s <daemon> . See the description of the SRC (system resource controller), namely the command chssys to change the starting behaviour.
No, SNMP won't affect these three either way.
This depends on the network service and a general answer can't be given. You will have to determine which network services you need in particular and then find out if they rely on SNMP. What you have said so far indicated that you don't need it, but just try it and see what happens. In teh unlikely event of you having to start them again: use the startsrc command to start them via the SRC.
I disabled SNMP related daemons on test AIX LPARs.
on /etc/rc.tcpip file;
# Start up the Simple Network Management Protocol (SNMP) daemon
#start /usr/sbin/snmpd "$src_running"
#start /usr/sbin/snmpd "$src_running"
# Start up the snmpmibd daemon
# Start up the hostmibd daemon
#start /usr/sbin/hostmibd "$src_running"
# Start up the aixmibd daemon
#start /usr/sbin/aixmibd "$src_running"
DiViN3, it is not a problem, it is by design so. clstat uses snmp to obtain information about cluster. clinfo is just small layer between HACMP and SNMP, which delivers all this information. Switch off snmp and run cldump to see a result.
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