Port polling takes up to 380 seconds on Juniper EX 4200 Series

Tags: #<Tag:0x00007f3b826b3b08>

Hi,
we’re having an issue with the poll time on some Juniper EX 4200 Switches.
Polling overall takes up to 1000 seconds in peak and switches are not capable to answer to any other SNMP checks in time during the running poller.
Statistics shows that the main reasons are the port polls, which takes up to 380seconds.

Is there any chance to improve this? Disabling unneded modules doesn’t seem to be to promising, as e.g. OSPD module poll only takes up to 3 seconds overall…

Validate Output:
-bash-4.2$ ./validate.php

Component Version
LibreNMS 1.64.1-39-gdb38c27
DB Schema 2020_05_24_212054_poller_cluster_settings (166)
PHP 7.3.19
Python 3.6.8
MySQL 5.5.65-MariaDB
RRDTool 1.4.8
SNMP NET-SNMP 5.7.2

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

[OK] Composer Version: 1.10.7
[OK] Dependencies up-to-date.
[OK] Database connection successful
[OK] Database schema correct
[WARN] Your local git contains modified files, this could prevent automatic updates.
[FIX]:
You can fix this with ./scripts/github-remove
Modified Files:
bootstrap/cache/.gitignore
logs/.gitignore
rrd/.gitignore
storage/app/.gitignore
storage/app/public/.gitignore
storage/debugbar/.gitignore
storage/framework/cache/.gitignore
storage/framework/cache/data/.gitignore
storage/framework/sessions/.gitignore
storage/framework/testing/.gitignore
storage/framework/views/.gitignore
storage/logs/.gitignore

Discovery Output:
https://p.libren.ms/view/72e9337e
Poller Output:
https://p.libren.ms/view/1794520f

Would be great if someone could help us out on this.

Best,
dsxgd

Hi,

Those discovery/poller outputs are not from a Juniper device.

Sorry for that, was confused with some other poller/discovery outputs from another support case i want to open :wink: the links are updated now.

Thats a lots of ports BUT i saw switches with way more.

Maybe you could give a try to the per port polling. That will increase the number of request but more shorters than a full snmpwalk.

My operational experience is that 15.1 doesn’t run great on the 4200’s. We saw similar performance problems when we upgraded ours.

Downgrading to 12.3 fixed it for us, but we eventually dumped them in favour of 4300-MP’s.

Thanks for your help. The “per port polling” decreased the polling time of port module to ~50 seconds in average.
A Firmware downgrade is unfortunately no option for us…