We have a Cisco 2921 ISR connected to a 500Mbps ISP line for Internet. Also, it is running a DMVPN to the main office. Both Outside and Inside interfaces are connected Full Duplex, 1Gbps.
People are complaining, at times, of slowness. When I check the router it doesn't appear to be overloaded. There are, however, a lot of input errors.
A person at that site mentioned that the router we are using only has a 50Mbps throughput.
I am not sure where he got that information, but when I do a speed test it I get a around 350Mbps download and 100Mbps Upload.
Any ideas on troubleshooting?