4天（96小时）固定时间，自动断+重连，很烦

问题是4天（96小时）自动断+重连，不知道是不是路由器的问题，以下是记录的系统日志（部分IP已被“*”代替）：
3days, 19:50:08, DHCPS: Unsupported DHCP message (02) -- ignoring.
4days, 00:00:14, PPP: [LCP]RX TERMINATION_REQUEST.
4days, 00:00:14, PPP: [LCP]TX TERMINATION_ACK.
4days, 00:00:14, PPPOE: RX PADT.
4days, 00:00:14, CE: -90202 wanIP changed.
4days, 00:00:15, PPPOE: TX PADT[session=****].
4days, 00:00:22, PPPOE: Standard authentication.
4days, 00:00:22, PPPOE: TX PADT[session=****].
4days, 00:00:22, PPPOE: try special dial type 0.
4days, 00:00:22, PPPOE: TX PADI.
4days, 00:00:22, PPPOE: RX PADO, AC-NAME=SY-****-******-***-*, AC-MAC=**-**-**-**-**-**.
4days, 00:00:22, PPPOE: TX PADR.
4days, 00:00:22, PPPOE: RX PADS[session=****].
4days, 00:00:22, PPP: [LCP]RX CONFIGURE_REQUEST.
4days, 00:00:22, PPP: [LCP]TX CONFIGURE_REQUEST.
4days, 00:00:22, PPP: [LCP]TX CONFIGURE_ACK[mru=1492, auth=C023/5, magic=8E3CC21A].
4days, 00:00:22, PPP: [LCP]RX CONFIGURE_ACK[mru=1480, magic=013C7B2C].
4days, 00:00:22, PPP: [PAP]TX AUTHENTICATION_REQUEST.
4days, 00:00:22, PPP: [PAP]RX AUTHENTICATION_ACK.
4days, 00:00:22, PPP: [IPCP]RX CONFIGURE_REQUEST.
4days, 00:00:22, PPP: [IPCP]TX CONFIGURE_REQUEST.
4days, 00:00:22, PPP: [IPCP]TX CONFIGURE_ACK[ip=***.***.**.*].
4days, 00:00:22, PPP: [IPCP]RX CONFIGURE_NAK.
4days, 00:00:22, PPP: [IPCP]TX CONFIGURE_REQUEST.
4days, 00:00:22, PPP: [IPCP]RX CONFIGURE_ACK[ip=***.***.***.**, dns=***.**.**.**/***.**.**.**].
4days, 00:00:23, PPPOE: ppp0 set localIp ***.***.***.** remoteIp ***.***.**.* mtu 1480.
4days, 00:01:54, CI: TCP req, cloudCom **.***.***.**:*****.
4days, 00:01:55, CI: TCP req, succ.
4days, 00:01:56, CI: TCP req, cloudCom **.***.***.***:*****.
4days, 00:01:57, CI: TCP req, succ.