Hi Everyone - very strange problem which popped up out of nowhere. We have a corporate 100up/100down link (fiber) going through Crown Castle ISP here in South Florida and out of nowhere whenever anyone utilizes 100% of the WAN downloading something, traffic stops responding until the load is removed. Before, it used to still go out no problem, the WAN would just give 50mbit for one user and 50mbit for the other if necessary and just keep splitting/dividing up bandwidth to let everyone out, but not anymore.
Nothing changed, we are going from a fiber DEMARC>CISCO 2921 router> Firewall>Core switch> users (only 25 end users). Flat network, no VLANs or anything so we tried bypassing core switch and firewall, hooked directly into the CISCO the same thing happens. If i run a constant ping to say www.google.com and then run a speedtest.net, it will timeout most replies (not all but enough to effectively be "down") and people will come asking if the internet is down since they cant access websites.
How do we even approach our ISP about this? Is this a "thing" and why would it start happening all of a sudden? We've been in the same building with the same service and same equipment for 8 years. Literally, nothing changed (at least that we can see). Were we oversubscribed on the ISP-side? What should we tell them when we call and ask what the heck is going on?
Thanks!
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