Hi Gavin,

 some users already report about troubles with missed some entities
on JunOS version 18.x.
Probably Juniper something has changed a lot in support SNMP on JunOS.

Can you provide temporary snmp access to an device with this firmware version?
My devel IP is 77.222.50.30
If possible, send me access personally by mail.

Gavin Henry via observium wrote on 12.12.2019 19:10:

Hi all,

We've just swapped out some Juniper MX80's for MX204s:

https://www.juniper.net/us/en/products-services/routing/mx-series/mx204/

and we are running Juniper JunOS 18.2R1.9 ([MX204] Internet Router).
We didn't add a new device, but Observium picked it up OK as it has
the same details.

But I've now noticed memory usage has gone. Any tips?