We have replaced all our hubs with switches here at the City and we still
have about 3 DTC's. The work with no problem. We are going to remove the
DTC's left as time permits.
Gary
----- Original Message -----
From: "Dana Smith" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 01, 2004 4:10 PM
Subject: Re: [HP3000-L] OT: Lack of Network Performance
The problem with your proposed approach to my mind is it simply isn't a
best practice strategy. It adds complexity when you need simplicity.
Hubs should definitely be replaced with switches as soon as it's
feasible. Hubs generate collisions which will have an extremely adverse
impact on your network.
It's not clear to me why you need to keep even the one hub with the
DTC's. (I admit I'm not an HP/MPE expert which is why I'm here.) A
switch acts like a hub other than how it handles contention so should be
a direct replacement for a hub. Mux? Oh my I haven't used those in over
10 years?
I think Tim Cummings has a good point focusing on the fiber vs copper
question. Remember that copper windings flowing electricity (big motors)
cause magnetic fields. Magnetic fields cause electrons to misbehave
which is exactly what you are dealing with now... I'd check it out.
DS
> -----Original Message-----
> From: Tom Hula [mailto:[log in to unmask]]
> Sent: Wednesday, September 01, 2004 5:46 PM
> To: [log in to unmask]
> Subject: Re: [HP3000-L] OT: Lack of Network Performance
>
>
> So I guess what I am hearing is that I should replace the
> hubs I still have and then the gremlins may go away? The
> office with the apparent distance problem and the internet
> connection are both on the same switch. Is it possible that
> the traffic on the hub is slowing everything down? I do have
> to keep at least one hub, since that is where the DTCs hook
> into. And yes, I am working toward replacing the DTCs as
> well, but I have a bunch of printers to replace and a remote
> site connection over a mux to resolve before that can happen.
> I can get most everything else off the hub.
>
> So I'm also hearing nothing about my suggestion of putting a
> switch halfway and plugging the other side of the office into
> that. Is that under the heading of unnecessary?
> Tom
>
> ----- Original Message -----
> From: "Mark Wonsil" <[log in to unmask]>
> To: "'Tom Hula'" <[log in to unmask]>; <[log in to unmask]>
> Sent: Wednesday, September 01, 2004 5:02 PM
> Subject: RE: [HP3000-L] OT: Lack of Network Performance
>
>
> >>>> This is a fast Ethernet peer-to-peer network (supposedly ... the
> >>>> indicators on the switches and hubs all say that 100 Mbs
> is active,
> >>>> anyway). One thing I could do is install a switch part
> ways out to
> >>>> the other half of the building and have all the lines
> connect there
> >>>> to boost the signal? Will that work? I've also heard of
> repeaters
> >>>> to boost the signal.
> >
> > Tom,
> >
> > I don't know how old your hubs are but I recently started replacing
> > hubs with unmanaged switches (literally plug and play - no
> tables to
> > maintain) and that really cuts down on the collisions.
> They have come
> > down in price too (@ $125 for a 24 port duplex 100MB switch
> for units
> > from Linksys/Cisco or SMC. I'm sure HP has an equivalent too.) It
> > has made a large improvement at the school when the
> computer lab is in
> > full swing. The teacher can monitor the students' screens and that
> > generates a lot of traffic. Having the full-duplex helps in some
> > applications too. The nice thing is you don't have to do it all at
> > once. I would start with your Internet access point and
> then move out
> > to the problem areas - keep users who do heavy transfers on
> one switch
> > if possible for example.
> >
> > Mark W.
> >
>
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