Today, after I had to shut down my computer (my landlord was doing electric work), I brought it back up and lost my Internet connection. No DHCP to cable company. After talking to their support, it seemed my modem receives pings and so the problem is on my side. After a while I think I got it down to defective hardware. Either the cable between the modem and the computer was defective, or the actual ethernet device is.

After replacing the cable and shaking it a bit, I got a Link Beat and was able to get DHCP from the cable company and to get my connection to Actcom. But the connection is awfully slow. Pinging to actcom's web server, I get 23% packet loss. Looking at the messages log, I keep getting log messages from"decaps_gre:pptp_gre.c:404" saying "buffering packet X (expecting Y, lost or reordered). Now, I know this should happen from time to time, but not several times per second...

In addition, I occasionally get "Oversized Ethernet Frame" messages in the log, from eth1.

Now, the question is: should I kiss my onboard ethernet goodbuy and buy another PCI ethernet card? Could the problem be in the modem, or something that I could fix with a screwdriver and some courage? Or maybe it's not at this low level at all, but something temporary at the cable company level or Actcom?

Is there a diagnostic tool for the ethernet device I could use?

I'm far from being anything remotely like a network guru, so bear with me.

My configuration: Mandrake 10.1 OE, kernel 2.6.81-12mdk. Two Ethernet interfaces: eth0 is connected to the LAN, it's a PCI card detected as DEC|DECchip 21142/43. The problematic interface is eth1, connected to the cable modem. It's detected as VIA Technologies|VT6102 [Rhine II 10/100]. The cable modem itself is Terayon. The cable connection is through a dialer, but with a fixed IP if that's at all relevant. The PPtP connection is established using the Kinneret wizard.

Any help appreciated,
Herouth


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