Re: [NTISP] 100Mbit slowdown problem

Josh Hillman ( (no email) )
Fri, 10 Mar 2000 11:26:10 -0500

From: Malcolm Joosse <malcolm@hotline.net.au>
> We have tried to set the server to 100FD but it would only run for a short
> period of time before going back to 100HD. The same thing happens on the
> workstations with 100FD settings.
> We are running a 16 port Planet 10/100 Switch.
> Both the server and CAD stations have 3Com 10/100 3c509's, I believe that
we
> have ruled out cabling and the cards in the PC seem ok it only the switch
> could be the problem.

Maybe you hve to specify which device (switch or NIC) is the "master".
Sometimes there are full/half duplex issues but I've only seen them with
network devices (routers, etc.) and a few Suns. We have an HP AdvanceStack
Switch 2000 with 4 100VG modules (and also some 10Mb modules). The 100VG
modules presently have a single computer (3 servers and my workstation)
plugged directly into each one. In our case, I'm able to leave the
computers and the HP at their default "automatic" sensing settings and
everything works flawlessly. In fact, in the 3.5 years that it's been set
up this way, I've never seen a single errored packet go to or from any of
the 100VG-based computers. Too bad 100VG (vg=video grade) isn't compatible
with 100TX.

Josh

> -----Original Message-----
> From: ntisp-request@iea-software.com
> [mailto:ntisp-request@iea-software.com]On Behalf Of Stainforth, Matthew
> Sent: Friday, March 10, 2000 11:40 PM
> To: 'ntisp@iea-software.com'
> Subject: RE: [NTISP] 100Mbit slowdown problem
>
>
>
> manually set the switch port and the card to 100 mbit full or half duplex.
> When these settings don't jive between the card and switch it can cause
the
> problems you describe.
>
> Matthew Stainforth || Technical Services Manager || BrunNet Inc.
>
>
> > -----Original Message-----
> > From: Malcolm Joosse [mailto:malcolm@hotline.net.au]
> > Sent: Friday, March 10, 2000 12:45 AM
> > To: winnt-inet@net-shopper.co.uk; ntisp@iea-software.com
> > Subject: [NTISP] 100Mbit slowdown problem
> >
> >
> > Hello List,
> > We have a client that has grown from 5 staff to 50 in 1 year.
> > They were having network slowdown problems so we put in a
> > 3Com 100Mbit card
> > in the server and a 10/100Mbit Switch. This made a huge
> > difference to the
> > speed of the entire network. The problem now is that they
> > have 3 CAD PC's
> > that were on 10Mbit and they thought that it would be good to
> > put 100Mbit
> > cards in them. So we did and plugged them straight into the
> > switch. They
> > tested by saving a 1Mb file, it took 5sec on 10Mbit but 30sec
> > on 100Mbit. I
> > thought that the problem may be the CAT5 cabling but we got a
> > shielded CAT5
> > cable and ran it directly from the PC to the switch, but it made no
> > difference. I thought that the server cable may be the
> > problem so we ran
> > another shielded cable from the server to the switch but no change.
> >
> > The problem I have is that the client wants to have a fast network but
> > nothing we change seems to make it any faster.
> > Any ideas as to why the files take longer to save at 100 than at 10 ?
> >
> > Help
> > Regards
> >
> > Malcolm Joosse
> > Hotline Support Pty. Ltd.
> > malcolm@hotlinesupport.com
> > www.hotlinesupport.com
> >
> >
> > For more information about this list (including removal) go to:
> > http://www.iea-software.com/support/maillists/liststart
> >
>
> For more information about this list (including removal) go to:
> http://www.iea-software.com/support/maillists/liststart
>
>
> For more information about this list (including removal) go to:
> http://www.iea-software.com/support/maillists/liststart

For more information about this list (including removal) go to:
http://www.iea-software.com/support/maillists/liststart