2.1.98: ifconfig reports many errors

Felix von Leitner (leitner@math.fu-berlin.de)
Wed, 29 Apr 1998 22:41:23 +0200


My ifconfig looks like this:

> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Bcast:0.0.0.0 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:3584 Metric:1
> RX packets:78 errors:0 dropped:0 overruns:0
> TX packets:0 errors:19766 dropped:78 overruns:0

Huh? Errors on loopback?!

> ippp0 Link encap:Point-to-Point Protocol
> inet addr:[IP] P-t-P:[IP] Mask:255.255.255.0
> UP POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
> RX packets:5385 errors:0 dropped:0 overruns:0
> TX packets:0 errors:391865 dropped:5759 overruns:0

How comes that my ISDN connection produces this a) errors at all and b)
this many. The connection appears sluggish in a major way, which
prompted me to look for problems in the first place. But this seems to
be a distant problem, not mine or my ISP's.

Anyway, that ISDN interface is funny anyway. Look what tcpdump says:

22:40:11.955351 truncated-ip - 16066 bytes missing!0.52.104.122 > 64.0.64.6: (frag 4864:16124@20480)

Every third packet looks like this. I tried switching off Van Jacobsen
header compression, but the symptoms stayed the same. Any ideas?
Should I just ignore this?

Felix

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