I work in a very small office where we have approximately 5 office desktops wired to the internet through what appears to be CAT5 mixed with CAT5e wiring.
The wires flow in this order: Desktops > Server room Patch panel > Netgear 24port gb switch > Cisco router 1900 series > Netgear 8port gb switch > Modem
We switched to a new ISP recently in order to get fast cable internet (300 Mb/s down). However, speed tests on the desktops yield only 7-10 Mb/s.
Plugging into the modem directly (or the 8port switch in front of the modem) yields high speed (280 Mb/s). Plugging directly into the 24port switch yields the slow desktop speeds pointing to either that device (or more likely, the Cisco router) as being an issue.
What are some of the best troubleshooting steps I can take to solve this issue? Are there any obvious configuration issues that a Cisco router could have to cause this kind of speed barrier?
I appreciate any advice. Thank you.