[plug] failing adsl connection

[Sol]

For some reason, just recently my pppoe connection over a D-Link 300 
ADSL ethernet modem has started falling over. Restarting the network 
gets it going agin and it stays going so long as there's some regular 
activity. Stay away too long and fails again. I don't know what's 
causing it nor what to do about it. But is seems that /var/log/messages 
gives some clues. Here's a slice:

Jul 21 13:27:19 tesla pppd[17950]: Script /etc/ppp/ip-up finished (pid 
17965), status = 0x0
Jul 21 13:27:26 tesla kernel: eth0: no IPv6 routers present
Jul 21 13:27:26 tesla kernel: eth1: no IPv6 routers present
Jul 21 13:30:08 tesla kernel: SuSE-FW-ACCEPT IN=ppp0 OUT= MAC= 
SRC=202.141.190.124 DST=202.72.180.183 LEN=48 TOS=0x08 PREC=0x00 TTL=110 
ID=48216 DF PROTO=TCP SPT=4825 DPT=80 WINDOW=16384 RES=0x00 SYN URGP=0 
OPT (020405B401010402)
Jul 21 13:48:07 tesla pppd[17950]: Terminating connection due to lack of 
activity.
Jul 21 13:48:07 tesla pppd[17950]: Setting MTU to 1492.
Jul 21 13:48:07 tesla pppd[17950]: Couldn't increase MRU to 1500
Jul 21 13:48:07 tesla pppd[17950]: Connection terminated.
Jul 21 13:48:07 tesla pppd[17950]: Connect time 20.9 minutes.
Jul 21 13:48:07 tesla pppd[17950]: Sent 202915 bytes, received 2015720 
bytes.
Jul 21 13:48:07 tesla pppd[17950]: Doing disconnect

I don't even know what MTU and MRU are:(  Anyone got any ideas what 
might be wrong?

thankyous; sol

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Sol Hanna
solATautonomonDOTnet