Eth0 flooding Vlan1

Discussion in 'Tomato Firmware' started by mtarnovan, Mar 22, 2007.

  1. mtarnovan

    mtarnovan LI Guru Member

    I have a weired problem. I'm running Tomato 1.06 on a Linksys WRT54GL (rev. 1.1). The internet connection is via PPPOE. My problem is the following:

    The router seems to route most (if not all) traffic from eth0 to vlan1. Because the ethernet link from my ISP is very noisy I get constant incoming traffic of 30-100Mbit/s, this kills the router almost instantly. (Symptoms include very high CPU usage, packet loss 40%+, telnet and web interface not accessible). What I don't understand is why all (or almost all) traffic from eth0 gets routed to vlan1 before being discarded.

    I tried everything I could think of, including reseting the NVRAM, restoring defaults etc.

    Any suggestion would be appreciated.
  2. mikester

    mikester Network Guru Member

    Hmm, maybe you have a computer infected with a worm/trojan on your network somewhere? Web interface not accessible? Do you still have trouble when you unplug the WAN port?

    Take a good look at your PC to start. Make sure it's clean. TCPview and Proces***plorer from Sysinternals can help. Try running wallwatcher to see the connections being made and wireshark to monitor traffic.
  3. mtarnovan

    mtarnovan LI Guru Member

    Plugged the WAN directly into PC and took a look at the traffic with Wireshark. Nothing interesting really, and it's highly unlikely I have a worm/troian on the PC, because the traffic is not coming from my PC.
  4. mikester

    mikester Network Guru Member

    If you are plugging your PC into the WAN port it sounds more like operator problems rather than tech support

    On second thought "spare the rod spoil the child comes to mind" as you can read "Plugged the WAN directly into PC" two ways. The second answer is plug the PC into LAN port, disconnect WAN port from the internet, do you still have problems
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