SNMP V3 Timeout for Cisco Devices

[msiriwardena]

I am using cacti 0.8.8b on Centos 6.4. I was able successful integrate may Cisco devices with my cacti installation using SNMPv3 authnopriv mode.

I have snmp timeout issue with two Cisco devices and SNMP get time to time timeouts for those devices. Both these devices working fine with SNMPv2.

Could you please help me to troubleshoot this issue as i couldn't enable SNMPv2 in my network.

[msiriwardena]

I have experience the same issue in my two cacti installations in two different centos distributions

Environment 1:
CentOS Linux release 7.0.1406

Environment 2:
CentOS release 6.2 (Final)

Issue Symptoms:
1) cacti throw SNMP error for some of the Cisco devices configured with SNMPv3 but manual snmpwalk and cmd.php <id> <id> commands are able to successfully poll the data.

2) tcpdump shows cacti dose not correctly sync the msgAuthoritativeEngineBoots & msgAuthoritativeEngineTime with the device and because of that device rejecting respond to the query. see attache captures.

3) The same behavior was observed with the Spine and cmd.php pollers

Solution:
This issue was sorted out after disabling the SNMP support for PHP and using cmd.php as the poller.
Even after disabling the SNMP support for PHP, things didn't improved for the spine poller.