以下のログ見て、どうおもうだろ。
ハードウェア的な話かな、、、
でも、多分、会社から見たときは、bge0がダウンって後も見れてたんだけどね。
家に帰ると、固まってて、外からは見えない状態になってた。
（periodic snapshotを、やってます。でも、どうなんだろ。関係ありそでなさそ。）

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Jan 31 04:04:25 ml110g6 ntpd[1252]: kernel time sync status change 6001
Jan 31 04:21:29 ml110g6 ntpd[1252]: kernel time sync status change 2001
Jan 31 05:46:48 ml110g6 ntpd[1252]: kernel time sync status change 6001
Jan 31 06:38:03 ml110g6 ntpd[1252]: kernel time sync status change 2001
Jan 31 08:06:09 ml110g6 root: snapshot: hourly.0 snapshot on filesystem /home made (durati
on: 1 min)
Jan 31 09:21:07 ml110g6 kernel: bge0: link state changed to DOWN
Jan 31 09:28:46 ml110g6 ntpd[1252]: sendto(133.243.238.163) (fd=22): No route to host
Jan 31 09:29:50 ml110g6 ntpd[1252]: sendto(210.251.0.81) (fd=22): No route to host
Jan 31 09:30:31 ml110g6 ntpd[1252]: sendto(210.251.0.16) (fd=22): No route to host
Jan 31 09:31:03 ml110g6 ntpd[1252]: sendto(210.173.160.27) (fd=22): No route to host
Jan 31 10:02:57 ml110g6 ntpd[1252]: kernel time sync status change 6001
Jan 31 12:06:10 ml110g6 root: snapshot: hourly.0 snapshot on filesystem /home made (durati
on: 1 min)
Jan 31 13:06:13 ml110g6 root: snapshot: hourly.0 snapshot on filesystem /home made (durati
on: 1 min)
Jan 31 18:06:07 ml110g6 root: snapshot: hourly.0 snapshot on filesystem /home made (durati
on: 1 min)