Around 3 years ago I blogged about using a Cisco 887VA Router as a VDSL Modem. As far as I recall I actually documented the configuration whilst getting ready to sell it, as I was downsizing my network.
Well, my network has since creeped back up in both size and complexity so I wanted to swap out the venerable Huawei HG612 VDSL modem for something else that could be rack mounted (cos bling). A quick google suggested the Cisco 887VA was still a good way to go, so I purchased another.
This time around I was a little more concerned it wouldn't be able to handle the throughput of my VDSL connection (50 Mb/s Down, and 16 Up). I think previously when swapped the previous modem for the 887, I ran a test on speedtest.net, and called it good when it showed a similar result to the Huawei.
I've since come to realise theres a bit more to it than that, with things like packet size and UDP vs TCP having quite a large impact on a devices maximum throughput, so I thought I should test the 887 more thoroughly before making it permanent.
Should you rush out and buy one? Probably not, I mostly got one for the aesthetic of rack mount gear. One benefit of the Cisco is some more detailed line stats, shown below.