SNMP probe timed out. Target is either unreachable or there are no valid credentials for it.? I verified IP is pingable(reachable), There are valid SNMP credentials. What else to be verified?

[Mallikharjuna]

SNMP probe timed out. Target is either unreachable or there are no valid credentials for it.? I verified IP is pingable(reachable),  There are valid SNMP credentials. What else to be verified?

[tim_broberg]

I've learned to just snoop the traffic with tcpdump or wireshark whenever snmp isn't behaving.

You'll see it iterate over protocols and credentials and walk through MIBs.

That traffic always seems to point the way as to whether the credentials I expect are there, timeout issues, etc.
    - Tim.

[Ashutosh Munot1]

Hi,

One more point to add is : Access Control list on this Switches. Check those and Firewall rules.

Thanks,
Ashutosh

[ssr99]

Hi mallikharjuna,
I am facing same issue can you help me what have you done for this.

[Jude S]

Hi.

I had this issue and got it fixed. My firewall and crednetials were working fine. However, during the troubleshooting I must have set the SNMP credential to apply to a specific MID Server. It was giving this error when the Discovery was routing via  a different MID Server.

Error: SNMP probe timed out. Target is either unreachable or there are no valid credentials for it.

Solution:
For my situation, I updated the specific credential record (SNMP V3 credential) so that it can be applied to "All MID servers". 

I hope this helps.

Regards,
Jude.