One device status issue

Hello all,

I have one device (Synology NAS) that I am monitoring over a dedicated IPSec tunnel. Now it usually reports back clean, however no matter how much I try to tweak the interval or anything it'll spit back a down status, and if I click the sensor manually, and click check now, it always returns clean.

My only guess is that cause I have 12 SNMP sensors querying against it that it maybe gets overloaded with the requests and doesn't get a response from all sensors at one time (since half my sensors report a warning, with the system health reporting down). I tried to look to see if there was a way to stagger sensor requests (in that if I have 12 sesnors, and an interval of 15 minutes, I could have each sensor query the device 1 minute apart).

Is this possible, or any other ideas why I'm having this annoying issue?

interval snmp staggered

Created on Jun 18, 2018 4:14:52 PM by AKDGCM (1) ●1

9 Replies

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Your Vote:

Hmmm, usually the Synology appliances take SNMP with ease. What sensors do you run against it?

Kind regards,
Stephan Linke, Tech Support Team

Created on Jun 19, 2018 11:57:24 AM by Stephan Linke [Paessler Support]

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1 SNMP Synology System Health.
1 SNMP logical Volume status
1 SNMP logical volume size
10 SNMP Physical Disc status

Created on Jun 19, 2018 4:35:44 PM by AKDGCM (1) ●1

Last change on Jun 20, 2018 6:02:41 AM by Stephan Linke [Paessler Support]

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0

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That's okay - how's the ping timing via VPN?

Kind regards,
Stephan Linke, Tech Support Team

Created on Jun 20, 2018 6:03:27 AM by Stephan Linke [Paessler Support]

Last change on Jun 20, 2018 6:03:40 AM by Stephan Linke [Paessler Support]

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ICMP response time is 20 ms.

VPN is IPSec based same ISP at source and destination.

This problem is driving me crazy...

Created on Jun 27, 2018 6:35:13 PM by AKDGCM (1) ●1

Votes:

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Your Vote:

Could you try to install another trial of PRTG (perhaps on-site) to see if the behavior occurs there as well?

Kind regards,
Stephan Linke, Tech Support Team

Created on Jun 28, 2018 8:22:39 AM by Stephan Linke [Paessler Support]

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Your Vote:

Just another assumption, is RAID scrubbing active on the Synology? They're currently working on a patch. If scrubbing is active, no SNMP queries are being responded to. Maybe that's the issue? You can verify that via the logs:

2018-06-25T18:00:01+02:00 medelo-backup02 synoraidtool: space_do_data_scrubbing.c:158 failed to enable RMW
2018-06-25T18:00:01+02:00 medelo-backup02 kernel: [ 2663.920000] md: requested-resync of RAID array md2
2018-06-25T19:14:15+02:00 medelo-backup02 kernel: [ 7117.550000] bad rx status 2f86c5fb, (overrun error)
2018-06-26T04:25:01+02:00 medelo-backup02 kernel: [40164.440000] md: md2: requested-resync done.

Created on Jun 28, 2018 12:23:47 PM by Stephan Linke [Paessler Support]

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I will check that out, thanks! I'll report back my findings.

Created on Jul 4, 2018 5:03:17 PM by AKDGCM (1) ●1

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Thanks! :)

Kind regards,
Stephan Linke, Tech Support Team

Created on Jul 5, 2018 6:13:34 AM by Stephan Linke [Paessler Support]

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We have updated the Synology NAS to the latest Firmware and I'll report back if this is still an issue or not.

Created on Feb 13, 2019 7:33:18 PM by AKDGCM (1) ●1