Subject: | |
From: | |
Reply To: | |
Date: | Fri, 5 Apr 2002 17:15:01 -0800 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
On 5 Apr 2002, at 12:16, Nick Torraca wrote:
> Hello all,
> I just got hooked up to Roadrunner cable internet service. I have
> three Windows 98se computers connected through a Linksys 4 port
> router. We do file and print sharing among the computers and Netbui
> is installed. I am getting about 50kbs download speeds. I backed up
> my registries and have experimented with some of the speed tweaks.
> Nothing seems to have much effect, but raising the tcp/ip receive
> window to 32767 seemed to help on one machine. Other machines
> already had higher settings. One machine had no maxMTU registry
> entry. I was having poor performance dialing in on that unit.
> Anyway, I don't know what made me try it, but I forced one network
> card to 100mbs, half duplex. Download speed seems to be
> consistently around 300kbs now. I tried dropping back to half
> duplex on the other machines with similar great results. My
> question is, what I have I done and is there a downside or another
> underlying problem?
In theory, full duplex offers better throughput, but only if your
network configuration ensures that collisions never occur. A NIC
configured for full duplex cannot detect collisions, and so learns
that dtata must be retransmitted only when it times out without
getting an expected response.
(I believe the 4-port LinkSys is a switch, so collisionless
operation should be *possible*.)
Any chance that it was filing to negotiate 100 Mbps and falling
back to 10?
> Also, I would like to maintain reasonable dial-in quality. As I
> said, I have no MTU entries on the one machine that has been
> horrible at dialing in. How can I restore all of the tcp/ip stuff
> to original settings? I tried removing and re-installing DUN, but
> its still not there. There are other related things missing too.
> Looks like somebody already ran a cable speed tweak on the dialup.
> I'd like to get everything back to original and experiment from
> there.
> Do I need the Netbui to do file and print sharing? I'm wondering if
> that has something to do with half duplex mode fixing things.
No. File sharing can work over TCP/IP or even IPX.
NetBEUI sends everything as broadcasts to the local network. This
can limit the effectiveness of a switch versus a hub, but should not
by itself cause collisions in a switched environment.
> My little network work well for me, but I'm getting over my head.
> Thanks for any guidance here. -Nick
Dave Gillett
The NOSPIN Group is now offering Free PC Tech
support at our newest website:
http://freepctech.com
|
|
|