Problems with SNMP

[barasniewski]

I have problem with SNMP in some devices on my network, the collector doesn't reach. The community is correct and the colletor can ping the device. What should I do?

[Jarrett Pomeroy]

Hello,



Can you please check if your devices have an ACL that may be blocking the SNMP requests? This would cause them to show as unreachable for CSPC.



Thank you,

Jarrett

[barasniewski]

I put a ACL to permit snmp to Collector's Server.

[barasniewski]

But doesn't solve my problem.

[Jarrett Pomeroy]

One way to do a validation test between the CSPC and Device is by logging into the CLI User as "root" and running a manual SNMPWalk command to see the output.

snmpwalk -v 2c -c example DeviceIPAddress .1.3.6.1.2.1.47.1.1.1.1.11

.1.3.6.1.2.1.47.1.1.1.1.11 Above is just a reference to ENTITY-MIB - Serial Number.

Thank you,

[barasniewski]

doesn't reach.

[Jarrett Pomeroy]

Hello,
In your test, please replace the word "example" with the configured SNMP Community string that you have configured on your device.
Thank you,
Jarrett

[Justin Sprake · Accepted solution]

This indicates either an additional ACL/permissions issue or perhaps even a network connectivity issue. Are there any firewalls in between the device and CSPC that the traffic must pass through?

I would consider any potential NATing that may be taking place as well as monitoring the intermediate devices to see if the SNMP query is traversing each hop along the way.