Summary
SNMP agent stays critical and NNMi is not able to reach it.
Question
SNMP agent stays critical and NNMi is not able to reach it.
Answer
1. Find the problem device where SNMP agent is in Critical status
2. Execute on NNMi: iptables -I OUTPUT -d <device-IP> -p udp -j DROP
(that is -I as Index, not l as line)
The above command will block outbound SNMP traffic from NNMi to the problem device only. Wait for about 5-6 minutes and then unblock the device using the command below.
iptables -D OUTPUT -d <device-IP> -p udp -j DROP
3. After that, run a Configuration poll on the the device. If it works with v3 credentials, it means the firewall in between is the problem.