bill@fedeva.UUCP (Bill Daniels) (05/29/90)
We recently acquired an Exelan LANalyzer. During our first uses of it,
we noticed that about 40% of the packets on one ethernet segment (which
is remotely bridged to another) show up as "Collision detected in preamble".
This segment is not busy necessarily when this happens. The actual number of
collisions reported seems fairly constant even as traffic picks up. On
a very quiet net (~ 2 packets / sec.) I see about 20 errors over ~ 30 secs.
When the segment is a little more active (~ 1000 packets / sec.) the error
rate is just about the same.
I have tried disconnecting the devices that the errors are associated with
but the collisions just move to the packets associated with other devices.
Any clues?
bd
--
bill daniels
federal express, memphis, tn
{hplabs!csun,mit-eddie!premise}!fedeva!billroot@bvsatl.UUCP (Super user) (05/31/90)
In article <98@fedeva.UUCP>, bill@fedeva.UUCP (Bill Daniels) writes: > We recently acquired an Exelan LANalyzer. During our first uses of it, > we noticed that about 40% of the packets on one ethernet segment (which > is remotely bridged to another) > Any clues? > > bill daniels > federal express, memphis, tn > {hplabs!csun,mit-eddie!premise}!fedeva!bill I had a similiar problem in the past. After much hair pulling, we found that you can not cascade DELNIs. That is, don't put the drop cable from a DELNI into a DELNI more than one level deep. While this may not be your problem, it sounds similiar. If this is not it, you may want to check cable lengths, cable types (ie rg58), etc. Bill VerSteeg