2 VLANS are configured on 2811 and terminated on 2960 switch on two ports, not a trunk configuration. Each Port is configured as a VLAN on the switch. Speed and Duplex is auto on router and switch still one port turns orange after few minutes. Loss of connectivity when port is turn orange. UTP cable is changed but still we got issue. Loss of connectivity is for 30 seconds then link is solid green for next 7 - 10 mins and back again orange (time out)