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ADSL caindo



Boa tarde amig@s,

estou tendo um problema com a nossa conexão ADSL (Brasil Telecom) que cai várias vezes por dia. Tenho um SpeedTouch Pro da Alcatel (Brasil Telecom) com eth0 em 192.168.2.2 conectado ao servidor manimatter (woody) com eth1 192.168.2.1, eth0 192.168.1.1, iptables e ip masquerading para a rede interna 192.168.1.0/24. O que acontece eh que a conexão entre servidor e roteador cai, nao consigo mais alcancar o roteador da rede interna. Ja que este nao tem log proprio, so tenho os logs do servidor. A mensagem geralmente eh esta: 

/var/log/syslog:
Jul 31 08:41:36 manimatter kernel: NETDEV WATCHDOG: eth1: transmit timed out
Jul 31 08:41:36 manimatter kernel: eth1: Tx timed out, cable problem? TSR=0x16, ISR=0x0, t=25.

ifconfig (manimatter, eth1:)
eth1      Link encap:Ethernet  HWaddr 00:00:B4:A4:29:65
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:144663 errors:0 dropped:7 overruns:0 frame:961
          TX packets:119436 errors:2394 dropped:0 overruns:0 carrier:4784
          collisions:40664 txqueuelen:100
          RX bytes:191426639 (182.5 MiB)  TX bytes:13106959 (12.4 MiB)
          Interrupt:10 Base address:0xf740
   ______________     __________________     _________________
  ¦ Rede interna ¦   ¦    manimatter    ¦   ¦  SpeedTouchPro  ¦
  ¦192.168.1.0/24¦---¦eth0:192.168.1.1  ¦   ¦         Brt:ADSL¦--Inet
  ¦              ¦   ¦  eth1:192.168.2.1¦---¦eth0:192.168.2.2 ¦
  ¦______________¦   ¦__________________¦   ¦_________________¦   

alguma pista?

Agradeco,

Pascal D. Angst
Coletivo de Informatica
ANCA / MST Brasilia

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