We have two isolated static ip devices can be pinged from the router and main switch, but cannot be pinged from other segments of the network. Not an acl, other ip devices in same segment can be pinged successfully. All ip addresses are assigned via dhcp server. Is not a duplicate ip address, because the nic is working and responds to a ping from some segments of the network. ex: 10.3.x.x cant ping only those two 10.1.x.x devices, but can ping other 10.1.x.x devices.