Problem Description
Customer has messages Received an ARP packet with a duplicate IP address in logs
Problem Analysis
From the logs, all of the ARP conflict logs are from “XXXX-XXXX-XXXX”.
May 14 2018 11:29:02+06:00 FW1 %ARP/4/ARP_DUPLICATE_IPADDR(l)[1]:Received an ARP packet with a duplicate IP address from the interface. (IpAddress=X.X.X.X, InterfaceName=Vlanif199, MacAddress=XXXX-XXXX-XXXX)
May 14 2018 11:28:48+06:00 FW1 %ARP/4/ARP_DUPLICATE_IPADDR(l)[3]:Received an ARP packet with a duplicate IP address from the interface. (IpAddress=Y.Y.Y.Y, InterfaceName=Vlanif199, MacAddress=XXXX-XXXX-XXXX)
May 14 2018 11:28:28+06:00 FW1 %ARP/4/ARP_DUPLICATE_IPADDR(l)[6]:Received an ARP packet with a duplicate IP address from the interface. (IpAddress=Z.Z.Z.Z, InterfaceName=Vlanif199, MacAddress=XXXX-XXXX-XXXX)
Root Cause
Cisco device enabled probe ARP.Cisco send probe ARP, so our device shows ip conflict. If you want to stop this type of conflict, you only ask Cisco to stop sending probe ARP.
Solution Description
Problem solved after cisco disable probe ARP.
