What Does the Log Message Saying "Failed to login through SNMP" Mean?

Created Apr 10, 2017 08:30:44Latest reply Apr 10, 2017 17:12:31 1562 1 0 0
What Does the Log Message Saying "Failed to login through SNMP" Mean?
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Adamcolob     Created Apr 10, 2017 17:12:31 Helpful(0) Helpful(0)

The log message saying "Failed to log in through SNMP" indicates that SNMP packets are failed to be parsed. Causes and workaround for such a log message are as follows:

Cause Workaround
The SNMP version on the NMS sent login requests is not v1, v2c, or v3. Run the display snmp-agent sys-info version command to check whether the SNMP version on the device is v1, v2c, or v3.
If so, go to Step 2.
If not, go to Step 3.
Run the snmp-agent sys-info version command to configure the SNMP version supported by the device. Then, check whether the problem can be solved.
If so, go to Step 4.
If not, go to Step 3.
Please contact Huawei technical support personnell.
End.

Packet bytes received by the device exceeds the threshold. Run the snmp-agent packet max-size byte-count command in the system view to modify the maximum packet bytes allowed on the device, and then check whether the system still generates logs.
If so, go to Step 2.
If not, go to Step 3.
Please contact Huawei technical support personnel.
End.

The community string is configured incorrectly. Run the display snmp-agent community command to view the community string configured for the device is identical with that configured for the device and NMS.
If so, go to Step 5.
If not, go to Step 2.
Run the snmp-agent community read command to configure a read community string and the snmp-agent community write command to configure a write community string.
Check whether the NMS can successfully log in to the device with the correct community string.
If so, go to Step 5.
If not, go to Step 4.
Please contact Huawei technical support personnel.
End.

Requests sent from the IP address is denied by the ACL. Run the display acl command to view the ACL configuration. The command output indicates whether the IP address from which requests are sent is denied by the ACL.
If so, go to Step 2.
If not, go to Step 4.
Run the rule permit source source-ip-address source-wildcard command in the ACL view to configure the ACL to allow the IP address.
Check whether the NMS can log in to the device.
If so, go to Step 5.
If not, go to Step 4.
Please contact Huawei technical support personnel.
End.
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