I am seeing repeated messages in the eventlog for one of my servers concerning MAC address changes for a virtual bridge.
vmbr1 in that case, connects to some virtual machines running on that host. The strange thing is, that it the values are always the same (old & new address).
vmbr1 MAC change: 78.46.xxx.xxx : f2:56:42:d2:aa:aa -> 8a:7b:4f:46:bb:bb
Looking at the timestamps I guess it is connected with device discovery, which runs from the following cronjob:
33 */6 * * * librenms /opt/librenms/discovery.php -h all >> /dev/null 2>&1
- 2017-07-12 00:35:18
- 2017-07-12 06:35:07
- 2017-07-12 12:35:10
- 2017-07-12 18:35:05
SNMP port association mode is set to