at my office at work I have internet provided by the building. Within my office I have a [D-Link DIR-632A](http://www.dlink.com/us/en/home-solutions/connect/routers/dir-632-wireless-n-8-port-router) with Firmware: [DD-WRT](http://www.dd-wrt.com/) v24-sp2 (03/25/13) std. I have 2 PCs hardwired, 4 PCs connected through wireless, 2 phones through wireless, 1 VOIP (Vonage) phone hardwired, 2 printers (1 hardwired, other wireless). Very often I get internet loss. I was able to replicate the issue one time, while downloading a very big Mac Update the other machines couldn't even bring up Google.com. As soon as the update was stopped, the internet on the other computers started working. While the update was going, DD-WRT admin webpage was reporting around 12 Mb of bandwidth usage through the WAN, which I believe is what the building caps me at. 

According to the Network Admin of the building the problem seems to be my router, which "he doesn't trust because of the firmware". Furthermore, he says that since I don't have it configured to distribute and give priority that is the expected behavior: the Mac is eating the total bandwidth and the other computers can't get anything.

It is my understanding that is the job of the router to be able to distribute the bandwidth as necessary. It should automatically lower the amount of bandwidth allocated to the Mac when new requests come in from other computers/processes and that it should work like that by default. Am I correct? Or should I configure my router like the Admin suggests? I have never run into this issue before. As a matter of fact when I'm watching movies at home, using the same firmware, and other processes start using the internet the quality lowers due to less bandwidth available to that machine. 

What am I to do?