PPPoE的怪问题

Poweroff

今天发现家里的服务器总掉线，每次几分钟就自动重拨一下，每次地址都变。查看/var/log/messages看到如下情况重复出现（IP地址修改或隐去）：

Oct 29 21:27:31 mmx pppoe[30737]: Inactivity timeout... something wicked happene
d
Oct 29 21:27:31 mmx pppoe[30737]: Sent PADT
Oct 29 21:27:31 mmx pppd[30736]: Modem hangup
Oct 29 21:27:31 mmx pppd[30736]: Connection terminated.
Oct 29 21:27:31 mmx pppd[30736]: Connect time 0.7 minutes.
Oct 29 21:27:31 mmx pppd[30736]: Sent 122 bytes, received 122 bytes.
Oct 29 21:27:32 mmx /etc/hotplug/net.agent: NET unregister event not supported
Oct 29 21:27:32 mmx pppd[30736]: Exit.
Oct 29 21:27:32 mmx adsl-connect: ADSL connection lost; attempting re-connection.
Oct 29 21:27:37 mmx pppd[30807]: pppd 2.4.1 started by root, uid 0
Oct 29 21:27:37 mmx pppd[30807]: Using interface ppp0
Oct 29 21:27:37 mmx pppd[30807]: Connect: ppp0 <-->; /dev/pts/0
Oct 29 21:27:37 mmx pppoe[30808]: PPP session is 408
Oct 29 21:27:37 mmx /etc/hotplug/net.agent: assuming ppp0 is already up
Oct 29 21:27:38 mmx pppd[30807]: Remote message: Welcome to use MA5200, Huawei Tech.^J^M
Oct 29 21:27:38 mmx pppd[30807]: local  IP address xx.xxx.xxx.xx
Oct 29 21:27:38 mmx pppd[30807]: remote IP address 10.10.10.10


用Ethereal监听了一下，只发现有本机（MMX）发出的一个PADI包？请问从日志可以看出是PPPoE接入服务器挂断的还是本机挂断的？如何解决？以前没有出现过这种现象，就是今天才这样的