Hi, I check on my C6506E with CSM v4.2, the logging show following msg:%CSM_SLB-4-TOPOLOGY: Module 1 warning: IP address conflict: ARP frame from 202.160.1.206 with MAC 00:1f:9e:53:c3:a1 received on VLAN 11%CSM_SLB-4-TOPOLOGY: Module 1 warning: IP ...