Hi, I receive the SNMPv2-MIB:authenticationFailure trap messages for Cisco switches. I've noticed it occurs more on the devices with more than one /30 IP address used for point to point connections.
For instance, the switch IPs in the Node Details lists are:
172.27.42.1 (polling IP)
The trap authenticationFailure arrives from 172.27.255.17. While receiving true trap messages for the device works.
Wireshark shows the correct Community Strings being passed.
Cisco config snippet
logging trap warnings
logging facility local1
logging source-interface Vlan340
logging host 10.10.254.10
snmp-server trap-source Vlan340
snmp-server host 192.168.101.22 informs version 2c Creek
If I place the device in unmanaged state the trap message authentication **** stops.
Thank you kindly for any helpful feedback!