This is only device/network trouble. (Not configurations/observium/etc)

Try run manually same command and small modifications:

(same)
snmpbulkwalk -Cr'100' -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry
(with timeout 3 sec)
snmpbulkwalk -t 3 -Cr'100' -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry
(set minimal repetition)
snmpbulkwalk -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry
(no bulk)
snmpwalk -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry
(no bulk with timeout 3)
snmpwalk -t 3 -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry

you can stop on first responded.

Eduardo Silvestre wrote on 16/09/2018 02:02:
Hello Mike,

 I've tried to setup observium with rrdcache but the polling stop working after apply configuration. However, permissions seems to be fine.

Nevertheless, when i've running poller.php -d -h myswitch" and got snmp timeouts but when run same command through command line works fine.

CMD[/usr/bin/snmpbulkwalk -Cr'100' -v2c -c *** -Pu -OQUs -m IF-MIB -M /opt/observium/mibs/rfc:/opt/observium/mibs/net-snmp 'udp':'********':'161' ifXEntry]

CMD EXITCODE[1]
CMD RUNTIME[2.0631s]
STDOUT[

]
STDERR[
Timeout: No Response from udp:********:161
]
SNMP STATUS[FALSE]
SNMP ERROR[#1002 - Request timeout]

I've a lot of switch with same IOS and same module but just two of them are with this behavior.

Any idea?

Best Regards,

--

Melhores Cumprimentos | Best Regards,
Eduardo Silvestre
ptisp | wherever internet can take you…

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Observium Limited, http://observium.org