> From: "leal" <[EMAIL PROTECTED]>
> Date: Fri, 20 Apr 2001 16:47:51 -0300
> Sender: [EMAIL PROTECTED]
>
> I believe that this question is pertinent in this forum. I have some
> wireless-lan's interconected with my principal lan that have internet
> access. Without visible answers, all my wireless-lan is with the traffic
> terrible!!! lost more lost. 50%, 75% of losses, this started more or less
> two days. i know tcpdump, how i use it??? i wanna help for debbug my
> network, looking for worms, viruses, i don't know... and i'm in panic.
> software??? how can i debbug and looking for bug's???
Before looking at packet dumps, look at interface errors. They may
give you a hint.
Usually large magnitude losses are the result of an auto-configuration
failure that leaves one end of a connection running full-duplex while
the other is half-duplex. The full-duplex end will have no collisions
(by definition) but will have a lot of other errors.
The half-duplex will probably also have a large number of errors, but
will also show many collisions.
The other thing to look for is bad interconnects. Damaged or poorly
crimped cables are a source of these problems.
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: [EMAIL PROTECTED] Phone: +1 510 486-8634
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