Internet speed slow, but fast on the Domain Controller?
Posted on 2013-01-30
Our Internet speed has been horribly slow for our facility for the clients since I started working here. I'm starting on troubleshooting it and get it going for them. As a non-related side project we had to re-do the wiring for the facility. So everything is running on Cat6, with new cisco routers and cisco gig switches etc. I was hoping the problem would disappear after that project but it hasn't.
Network speed is great for all of the machines, we haven't had much issue with that.
However the Internet speed is very slow. We have a 20 mg connection coming in for our small facility. I went on our domain controller (SBS 2011) that's plugged into a core switch, and I'm getting close to 16mg, which is great. However if I plug a client PC into the same switch they only receive about 1mg.
I figured it might have to do something with DNS. So I pinged Google.com and received about 46 ms latency. I then pinged Google's IP address and received bout 43 ms latency.
So I figured this would eliminiate possability of a issue for dns? Our forwarders are pointing at Google's DNS 18.104.22.168.
To make it even more complicated, "some" user machines are reiceiving about 4mg connection speeds after doing a speedtest. Though not too many of them are. But oddly they're all plugged into the same switch.
What else could be causing this? I'm stumped!