Problem with mass-collisions

matthew c. mead
Sat Aug 22 11:06:25 1998

Is there a list maintainer around?  How do I get off this list?


On Sat, Aug 22, 1998 at 02:25:14PM +0200, Georg Koester wrote:
> Hello List-Readers
> Since I started using 100Mbit-cards and 10Mbit-cards(ne2000) mixed on
> one hub, i always experienced this problem:
> - When using ftp between a ne2k and a 100Mbit I get massive collisions
> on the hub.
> - When doing so under winNT: normal operation; speed 360kb
> - When doing smb(both windoze and linux): massive collisions; speed 60kb
> - When using nfs between two linux-boxes: no collisions; [speed about
> 200kb]
> - When using ttcp -t -s: collisions; speed 60kb
> - But if i use a socketbuffer of at least -b1 I donī t get collisions. I
> have a speed of 116 or so kb. A bigger sockbuf gives better
> performance.(1024,2048)
> I never have these collisions when using only two ne2k(Iīm always using
> only two interfaces) and never had a chance to test two 100Mbit-cards. 
> So please can somebody interprete this behavior to me? Is my hub shit? I
> had as 100Mbit-cards: a tulip; and currently an Intel Pro/100b. My hub
> is just a simple one. Nothing special, but it worked just fine when I
> tried it in a bigger network with a mixed enviroment of bnc and
> tp-cables and more computers. I tried some different settings in
> eepro100.c as a module, but that didnī t change anything.
> Thank you very much.
> Georg
> -- 
> 	From: Georg Koester e-Mail:

Matthew C. Mead			Virginia Tech Mathematics Department
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