We have had some issues lately on a customers network, they say that auto negotiate was never enabled on their switches and all servers connected should be set to auto-negotiate off. The following is from the messages file on our servers which are connected to their network.
Jun 18 12:36:18 hostname vmunix: ee0: Autonegotiated, 100 Mbps full duplex
Jun 25 10:18:40 hostname vmunix: ee0: Autonegotiated, 100 Mbps full duplex
Jun 25 11:50:22 hostname vmunix: ee0: Autonegotiated, 100 Mbps full duplex
Jun 25 11:57:26 hostname vmunix: ee0: Autonegotiated, 100 Mbps full duplex
Jun 25 12:24:52 hostname vmunix: ee0: Autonegotiated, 100 Mbps full duplex
Jun 25 12:25:06 hostname vmunix: ee0: Parallel Detection, 100 Mbps half duplex
Jun 25 12:26:58 hostname vmunix: ee0: Parallel Detection, 100 Mbps half duplex
Sep 25 13:27:08 hostname vmunix: ee0: Parallel Detection, 100 Mbps half duplex
Sep 25 15:36:29 hostname vmunix: ee0: 100 Mbps Full duplex
Does this indicate that our NIC was negotiating successfully up until Jun 25 at 12:25:06? On Sep 25 15:36:29 we turned auto negotiate off on the NIC.