2010-10-14 07:33 AM
I understand that my cluster uses snmp as a heart beat check between heads - if I edit / configure both heads (both partners) community string to not use "public", but use something like "PEBAC" - is there a way to check if this would work without failing over a partner?
2010-10-14 07:41 AM
WOW! That is news to me. Yes, SNMP is enabled by default and Community string is "public" - and everyone that I have talked to confirmed that clustered partners use snmp as heartbeat between to two. I guess my questions is = does anyone know a way of testing the change to snmp wthout failing partner?
2010-10-14 08:45 AM
Now I didn't setup the current cluster FAS 3020 (before my time) - it is enabled - its state after a clean install is not the question here.
(I do have a fresh out of the box FAS3140 7.3.2.RC1)
community [ro / public]
If I attempt to disble snmp on the current cluster I receive message to set option snmp enable on partner or next takeover will not work correctly - this is what I would like to test, can I disable both and still have the "takeover" work correctly? And if so, is there a way to test without performing a failure.
UPDATE: (after nother call to NetApp Support) Spoke to another Tech early this afternoon - he did confirm that snmp is NOT used for heartbeat and only used for Ops Management - Now I'm comfortable in turning it off at this time. I will re-enable when Ops Management comes on-line.
JUST AN FYI: I've upgraded three FAS 3020s to FAS3140s and snmp is enabled "out-of-the-box".
Message was edited by: blastolotbob
2010-10-14 11:40 AM
We have modified the SNMP string, and had no issues doing it one head at a time, nor during failovers (even if they didn't match). I also have not heard of SNMP being used for cluster heartbeat.
2010-10-14 10:14 PM
FYI: I've upgraded three FAS 3020s to FAS3140s and snmp is enabled "out-of-the-box".
Upgrading hardware does not change exisiting system settings unless you wiped out root volume and performed clean new instalation. Anything that was enabled stays enabled.