[root@dfc:/var/log] # grep "em0: Link is" /var/log/messages
Nov 13 10:56:35 dfc kernel: em0: Link is Down
Nov 13 10:56:46 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Nov 29 06:49:46 dfc kernel: em0: Link is Down
Nov 29 06:49:51 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 2 07:52:33 dfc kernel: em0: Link is Down
Dec 2 07:52:39 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 11 06:54:41 dfc kernel: em0: Link is Down
Dec 11 06:54:47 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 13 06:53:23 dfc kernel: em0: Link is Down
Dec 13 06:53:29 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 23 08:46:55 dfc kernel: em0: Link is Down
Dec 23 08:47:01 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 28 07:36:09 dfc kernel: em0: Link is Down
Dec 28 07:36:14 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 29 07:31:50 dfc kernel: em0: Link is Down
Dec 29 07:31:56 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 29 08:35:11 dfc kernel: em0: Link is Down
Dec 29 08:35:17 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 30 08:40:25 dfc kernel: em0: Link is Down
Dec 30 08:40:31 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 30 08:43:30 dfc kernel: em0: Link is Down
Dec 30 08:43:36 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 30 09:20:51 dfc kernel: em0: Link is Down
Dec 30 09:20:57 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 30 09:22:56 dfc kernel: em0: Link is Down
Dec 30 09:23:01 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 31 08:21:22 dfc kernel: em0: Link is Down
Dec 31 08:21:28 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Dec 31 09:09:28 dfc kernel: em0: Link is Down
Dec 31 09:09:34 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 14 08:20:20 dfc kernel: em0: Link is Down
Jan 14 08:20:26 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 18 07:50:50 dfc kernel: em0: Link is Down
Jan 18 07:50:55 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 18 08:26:44 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 20 09:03:04 dfc kernel: em0: Link is Down
Jan 20 09:03:10 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 20 09:09:09 dfc kernel: em0: Link is Down
Jan 20 09:09:15 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 23 15:48:20 dfc kernel: em0: Link is Down
Jan 23 15:48:26 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 23 16:02:26 dfc kernel: em0: Link is Down
Jan 23 16:02:31 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 24 07:08:53 dfc kernel: em0: Link is Down
Jan 24 07:08:58 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 24 07:11:13 dfc kernel: em0: Link is Down
Jan 24 07:11:18 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 29 08:03:40 dfc kernel: em0: Link is Down
Jan 29 08:03:46 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 29 08:09:45 dfc kernel: em0: Link is Down
Jan 29 08:09:51 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 30 07:58:31 dfc kernel: em0: Link is Down
Jan 30 07:58:37 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 30 08:22:37 dfc kernel: em0: Link is Down
Jan 30 08:22:43 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Jan 30 08:58:43 dfc kernel: em0: Link is Down
Jan 30 08:58:49 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 06:50:23 dfc kernel: em0: Link is Down
Feb 1 06:50:28 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 07:12:15 dfc kernel: em0: Link is Down
Feb 1 07:12:33 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 07:15:32 dfc kernel: em0: Link is Down
Feb 1 07:15:38 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 07:36:38 dfc kernel: em0: Link is Down
Feb 1 07:36:43 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 08:36:44 dfc kernel: em0: Link is Down
Feb 1 08:36:50 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 08:51:50 dfc kernel: em0: Link is Down
Feb 1 08:52:00 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 09:51:01 dfc kernel: em0: Link is Down
Feb 1 09:51:06 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 10:06:21 dfc kernel: em0: Link is Down
Feb 1 10:06:26 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 10:57:42 dfc kernel: em0: Link is Down
Feb 1 10:57:48 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 11:08:32 dfc kernel: em0: Link is Down
Feb 1 11:08:38 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 11:22:38 dfc kernel: em0: Link is Down
Feb 1 11:22:43 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 11:59:14 dfc kernel: em0: Link is Down
Feb 1 11:59:19 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 12:22:19 dfc kernel: em0: Link is Down
Feb 1 12:22:25 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 13:31:26 dfc kernel: em0: Link is Down
Feb 1 13:31:32 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 13:46:31 dfc kernel: em0: Link is Down
Feb 1 13:46:37 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 13:57:36 dfc kernel: em0: Link is Down
Feb 1 13:57:42 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 14:43:12 dfc kernel: em0: Link is Down
Feb 1 14:43:18 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 14:45:32 dfc kernel: em0: Link is Down
Feb 1 14:45:38 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 14:52:07 dfc kernel: em0: Link is Down
Feb 1 14:52:13 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 14:58:12 dfc kernel: em0: Link is Down
Feb 1 14:58:18 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 15:14:18 dfc kernel: em0: Link is Down
Feb 1 15:14:23 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 16:21:09 dfc kernel: em0: Link is Down
Feb 1 16:21:15 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 16:39:00 dfc kernel: em0: Link is Down
Feb 1 16:39:05 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 16:58:50 dfc kernel: em0: Link is Down
Feb 1 16:58:56 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 17:07:55 dfc kernel: em0: Link is Down
Feb 1 17:08:01 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 17:44:16 dfc kernel: em0: Link is Down
Feb 1 17:44:22 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 17:48:21 dfc kernel: em0: Link is Down
Feb 1 17:48:27 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 18:03:26 dfc kernel: em0: Link is Down
Feb 1 18:03:32 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 18:04:31 dfc kernel: em0: Link is Down
Feb 1 18:04:37 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 18:56:38 dfc kernel: em0: Link is Down
Feb 1 18:56:43 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 20:14:44 dfc kernel: em0: Link is Down
Feb 1 20:14:50 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:00:50 dfc kernel: em0: Link is Down
Feb 1 21:00:56 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:23:56 dfc kernel: em0: Link is Down
Feb 1 21:24:01 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:37:01 dfc kernel: em0: Link is Down
Feb 1 21:37:06 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:38:05 dfc kernel: em0: Link is Down
Feb 1 21:38:11 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:40:25 dfc kernel: em0: Link is Down
Feb 1 21:40:31 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:52:30 dfc kernel: em0: Link is Down
Feb 1 21:52:36 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 21:54:05 dfc kernel: em0: Link is Down
Feb 1 21:54:11 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 1 22:33:56 dfc kernel: em0: Link is Down
Feb 1 22:34:02 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 03:06:07 dfc kernel: em0: Link is Down
Feb 2 03:06:13 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 04:46:00 dfc kernel: em0: Link is Down
Feb 2 04:46:10 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 06:15:41 dfc kernel: em0: Link is Down
Feb 2 06:15:47 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 06:41:31 dfc kernel: em0: Link is Down
Feb 2 06:41:37 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 06:44:36 dfc kernel: em0: Link is Down
Feb 2 06:44:42 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 07:41:28 dfc kernel: em0: Link is Down
Feb 2 07:41:33 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 08:07:33 dfc kernel: em0: Link is Down
Feb 2 08:07:39 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 08:15:53 dfc kernel: em0: Link is Down
Feb 2 08:35:55 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 08:40:41 dfc kernel: em0: Link is Down
Feb 2 08:40:47 dfc kernel: em0: Link is up 100 Mbps Full Duplex
Feb 2 08:57:01 dfc kernel: em0: Link is Down
Feb 2 08:57:07 dfc kernel: em0: Link is up 100 Mbps Full Duplex
[root@dfc:/var/log] #