長いけど、
接続後落ちて再接続を試みて落ちるまでのログです。
なぜ？？

redhat 7.1 /rp-pppoe3.1/ppp2.4/NTT フレッツADSLです。

Dec 22 22:42:59 tako pppd[3302]: Using interface ppp0
Dec 22 22:42:59 tako pppd[3302]: Connect: ppp0 <--> /dev/pts/0
Dec 22 22:42:59 tako pppoe[3303]: Changed pty line discipline to N_HDLC for synchronous mode
Dec 22 22:42:59 tako pppoe[3303]: PPP session is 64036
Dec 22 22:43:00 tako pppd[3302]: local IP address 218.47.33.166
Dec 22 22:43:00 tako pppd[3302]: remote IP address 218.47.160.6
Dec 22 22:46:43 tako network: Shutting down interface eth0: succeeded
Dec 22 22:46:43 tako pppoe[3303]: recv (receivePacket): Network is down
Dec 22 22:46:43 tako pppoe[3303]: recv (receivePacket): Network is down
Dec 22 22:46:43 tako network: Shutting down interface eth1: succeeded
Dec 22 22:46:43 tako sysctl: net.ipv4.ip_forward = 0
Dec 22 22:46:43 tako network: Disabling IPv4 packet forwarding: succeeded
Dec 22 22:46:44 tako apmd[652]: User Standby
Dec 22 22:46:59 tako pppoe[3303]: send (sendPacket): Network is down
Dec 22 22:46:59 tako pppd[3302]: Modem hangup
Dec 22 22:46:59 tako pppd[3302]: Connection terminated.
Dec 22 22:46:59 tako pppd[3302]: Connect time 4.0 minutes.
Dec 22 22:46:59 tako pppd[3302]: Sent 61476 bytes, received 572982 bytes.
Dec 22 22:47:00 tako pppd[3302]: Exit.
Dec 22 22:47:00 tako adsl-connect: ADSL connection lost; attempting re-connection.
Dec 22 22:47:05 tako pppd[3517]: pppd 2.4.0 started by root, uid 0
Dec 22 22:47:05 tako pppoe[3518]: Changed pty line discipline to N_HDLC for synchronous mode
Dec 22 22:47:05 tako pppd[3517]: Using interface ppp0
Dec 22 22:47:05 tako pppd[3517]: Connect: ppp0 <--> /dev/pts/0
Dec 22 22:47:05 tako pppoe[3518]: send (sendPacket): Network is down
Dec 22 22:47:20 tako last message repeated 2 times
Dec 22 22:47:36 tako pppd[3517]: LCP: timeout sending Config-Requests
Dec 22 22:47:36 tako pppd[3517]: Connection terminated.
Dec 22 22:47:40 tako pppoe[3518]: Timeout waiting for PADO packets
Dec 22 22:47:40 tako pppd[3517]: Exit.