The number of packets transmitted with carrier sense errors: This counter contains the number of times that the carrier sense signal from the physical layer interface was not asserted or was de-asserted during transmission of a packet without collision. The carrier sense signal is an ongoing activity of a data station to detect whether or not another station is transmitting. Carrier sense errors are detected when a station transmits a frame and does not detect its own signal on the wire. If you receive carrier sense errors, check the following: Failing cable: Packet data traveling through shorted or damaged cabling may cause a signal loss. Ensure that your cable is working and plugged in properly. Segment not grounded properly: Improper grounding of a segment may allow ground-induced noise to interrupt the signal. Ensure that you have properly grounded all segments. Noisy cable: Interference or noise produced by motors or other devices can interrupt the signals. Deaf/partially deaf node: A faulty station that cannot hear the activity is considered a deaf node. If you suspect a deaf node, the network interface card should be replaced. Failing hub, switch, or controller: Repeaters, switches and controllers can disrupt the network signal, transmit erroneous signals on the wire, or ignore incoming packets. Perform the following steps: 1. Swap out the adapter, adapter cable, and adapter attachment point, one at a time. If you find a faulty component, replace it. 2. If none of the items listed above help you isolate the problem, you may need to replace the switch or hub. Use a network analyzer to isolate the problem area.