Switch to limit bandwidth to Internet

Hi Experts-

I'm not a networking guru, so need a little help.  Our office building has one 40MB uplink to AT&T.  We have a new tenant that wants to share our internet, which is part of the lease agreement.  I'm going to put a switch between the AT&T equipment, our firewall and their firewall.  All simple.  What I need though, is a switch where I can limit their upload/download speed to the AT&T internet device.  Does such a device exist, and if so, can you share a link to the page/specifications?

Thanks!

-Joe
Joe ThompsonPrincipal ManagerAsked:
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CompProbSolvCommented:
There are managed switches that will allow such restrictions, but I've not worked with them enough to make a recommendation.

To what are you wishing to limit the bandwidth?  Specifically, if you want to limit it to 10M in both directions, just use a 10M switch.

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Muhammad BurhanManager I.T.Commented:
Try to get full bandwith as much as you can from the ISP because you are paying them for CIR. Restrict users or devices with your in-house firewall.
Create rules/filters in firewall which will take care of your need.
Please tell us about your firewall.
Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
I agree to Muhammad's comment - bandwidth allocation and restriction is a feature for the edge device, in this case your firewall. If you have another Ethernet port available for the tenant, restrict the available bandwidth of that interface.
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Joe ThompsonPrincipal ManagerAuthor Commented:
The edge device is managed by AT&T so I need another device to put between AT&T and My firewall, my renter's firewall.  I was thinking there was a simple device that I was unaware of that was designed specifically for this use, but maybe I'm wrong and I'd need another firewall.  I cringe at the thought of multiple firewalls though as it's an app nightmare.  I may just go with the 10MB switch as first suggested here.
CompProbSolvCommented:
Can you get AT&T to put their device in bridge mode?  That makes it act more or less like a simple modem with no router involved.  You'd add your own router/firewall to it.  With the appropriate device you could set bandwidth limits on different ports.
Joe ThompsonPrincipal ManagerAuthor Commented:
Good idea, simple and inexpensive.  Cheers!
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