Yes. And we now insist on using THE LAN. Direct fibre and copper cabling limits the user to the location installed. Also there is often confusion on ownership as BMS users frequently consider their cable to be LAN. 

VLAN separation is considered good enough for most secure organisations. 

Happy to discuss further with you. 

Paul


On 7 Dec 2011, at 04:37, "Jon Nicholson" <[log in to unmask]> wrote:

> Sorry if this isn't the right forum to ask this. I'm looking for people
> who have experience with running a converged network for building
> services (bms, security, cctv etc) and their normal data network,
> particularly in the research community.
> 
> I've been asked to advise on a project and the facilities people are
> insisting on a separate physical network for their BMS, this will run
> over the same infrastructure (fibres utp etc) but on independent switch
> gear.
> 
> This seems a bit ridiculous as there will already be an investment in a
> resilient data network for the institute.
> 
> I'd be interested to hear if anyone's got experience of running this
> sort of converged network, good or bad.
> 
> Thanks,
> 
> Jonathan Nicholson
> 
> -- 
> 
> Jonathan Nicholson - Networking Group Team Leader 
> The Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, 
> Hinxton, Cambridgeshire, CB10 1SA - Tel 01223 834244
> 
> The Wellcome Trust Sanger Institute is operated by Genome Research 
> Limited, a charity registered in England with number 1021457 and a 
> company registered in England with number 2742969, whose registered 
> office is 215 Euston Road, London, NW1 2BE.
> 
>