On 6/28/07 10:31 AM, "Daniel Farnworth"
<email@hidden> wrote:
>
>
>
> On 27/06/2007 17:21, "Steven Stortz" <email@hidden> wrote:
>
>> As I purchase more gigabit ethernet machines, I want to put in a new
>> Gigabit Switch to handle the traffic. The D-Link DGS-1248T http://
>> www.dlink.com/products/?pid=367 has been recommended which has 48
>> 10/100/1000 ports + 4 combo SFP switch. It would be working with my
>> 2 HP ProCurve 2650 switches. This would be used in a school
>> setting with around 50-75 concurrent users. Does anyone have any
>> experience with this device or D-Link's reliability at this level?
>>
> Steven,
>
> I don't have any experience with D-Link switches (at least not recently),
> but we do use HP throughout our network, and have found them (when
> configured correctly by the consultants, who cost a lot but weren't worth
> much!), to be very reliable and also with a good guarantee (lifetime).
>
> If you've already got HP switches I would stick with them for adding more.
> We got a Procurve 2848 which I believe has the same port configuration as
> the D-Link you mentioned and with virtually all ports used we're still
> barely touching the sides on the backplane.
>
> My tuppence
>
> Dan
Ditto what Dan says. We are an all ProCurve shop too and have found them to
be very reliable and the one or two times we have had problems, the lifetime
warranty was great. In one instance that I remember, the switch that went
bad was an six year old 10/100. They obviously didn't make that model
anymore and replaced it with an equivalent new (not refurb'd) 10/100/1000.
Nice.
ProCurve is very good equipment for the money. I'd stick with them.
The only drawback I can think of is that the unmanaged switches are set to
auto-negotiate. Which means any Mac, server, etc., also needs to be set for
auto-negotiate, otherwise the switch will default the port to a setting of
100MB half-duplex.
So you've either got auto-negotiating going on or if you aren't paying
attention to network settings on your Mac, for example, you'll end up with
less than optimal network speed.
This gave us a big headache with latency when we had a Win2K3 server hosting
shares via SFM and our G5's. Both plugged into an unmanaged ProCurve. The
Win server at the time only had a 100MB network interface and was set to
100MB full duplex. Because it wasn't set to auto, the switch defaulted to
100MB half duplex. The G5's were set to auto and were connecting at 1000MB
full duplex. Bam, we got hit with latency issues big time. And that's when I
learned how the unmanaged switches behave.
Granted, any switch, where device and switch port settings are mismatched
will likely give you the same behavior. But it would have been easier to set
the port on the switch to match the server's NIC. And leave auto-negotiate
out of the picture altogether.
Since then we put a gig NIC in the server. But have also decided that
primary network backplane switches will be of the managed flavor.
-John Hedren
Anagram Int'l Inc
Minneapolis
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