How fast are your links to feeder cabinets? What are you using Fibre/Ethernet, both?
I'd be really interested to know what links schools have from their main cabinet to feeder cabinets. Have you got 1 fibre cable to each cabinet? are you using Ethernet or both, is the fibre OM1 (1gb) or OM3 (10Gb) etc.?
We have one main cabinet with 2 X HP 4108GL's connected together via GB stack. Our 7 feeder cabinets all have an OM1 1Gb fibre cable going to one switch in the cabinet. Some cabinets have 1 switch, some 2 and some even 3 or 4. To increase speed quickly and cheaply we have run some CAT5E to a couple of the cabinets close by which have multiple switches. The top switch is already connected via fibre then for the other 2 or 3 switches we have added a CAT5E cable which runs back to a 1GB port on the core switch. It seems to work well and you can pick up 6 or 24 port modules for the 4018GL pretty cheap.
All our HP Procurve switches are running at 100/100 but ideally we would like to replace them for GB and look at replacing the core switch. Problem is, if the pipe back is generally just a 1Gb fibre, I really can't see there will be a gain and it seems too messy to be running the amount of Ethernet cable you would need to provide a suitable pipe -I would say you need 4GB per 48 10/100/1000 switch.
Are schools using OM3 10Gb fibre or have you done the same as us or have people got GB switches with just one 1Gb fibre cable back to the main cabinet?
10Gb fibre just looks too expensive to me!
Thanks very much in advance.