Forum Discussion
Dec 03, 2015
Hi,
did you check the MAC masquerading settings on your BIG-IPs? In TMOS v9/v10 you will find it in the VLAN settings. (v11 has it in the traffic-group configuration.) Perhaps somebody has entered the routers MAC address and you are facing a duplicated MAC address issue? You can run a tcpdump including the layer 2 information to check for ARPs in you network:tcpdump -nnni -e -c 100 'arp and host '
The sample above limits the output to 100 packets "
-c 100
" showing both ARP requests and responses related to your floating self IP and displays the ethernet header information "-e
".
Now you can clear your servers ARP cache and force a new address resolution and watch what is happening.
Thanks, Stephan