Forum Discussion
Mar 20, 2015
Hi Muhammad,
F5 is using two vendor MAC ranges (legacy products on 00:01:d7 and current product generation on 00:23:e9).
Replacing the 2nd bit to be send, i.e. by changing the MAC address to start with "02" (with ethernet the least significant bit will be send first) as with 02:23:e9 indicates as self administered MAC address. VLAN group configurations are automatically using this type of MAC addresses.
The shown MAC address is an address hold on the active BIG-IP and learned by the Cisco switch.
Personally I´ve never been a fan of using VLAN groups as they are hard to troubleshoot, not used often in the field and it´s easy to run in loop issues.
If you do not notice high throughput spikes simultaneously to the log messages I won´t be concerned and would assume they are caused by G-ARPs or ARP replies sent by the active unit.
I just noticed your other post on this subject 4 month ago and recommend to open a support case.
Thanks, Stephan