We have a rather peculiar problem with internet speed in our office. Recently, we switched to a fiber-optic connection. We're supposed to have a 100Mbit connection (up and down). Here's how it has been set up (we're in a building with multiple tenants but just one fiber-optic connection, that's why we're using static IP routing so every tenant has their own IP):
- Vigor 2130n router where the cable comes into the building
- Vigor 2130n router in server room (connected to router #1 via WAN port w/ patch cable)
- 100M network switch connected to router #2 LAN port
- Vigor 2130 router connected to switch #3 via WAN port, using Static IP routing
- Gigabit network switch connected to router #4
- My computer connected to switch #5
Now the funny thing is, that when I connect router #4 to switch #3 using a LAN port (which is of course exactly the same as plugging switch #5 into switch #3) I have a 100 Mbit internet connection (according to Speedtest.net). However, when I connect router #4 to switch #3 using the router's WAN port (which is necessary for the static IP), I only get about 48 Mbits up and down the line.
The Vigor 2130n and 2130 have gigabit WAN and LAN. The (n) version also has WLAN.
When I log into router #1, it says that its WAN port uses a
1Gfdx connection. Router #2 I don't have access to. Router #4 says its WAN port uses a
Can anyone explain why we might be getting a lower speed when using the WAN port? I've proposed to the building manager to test if switch #3 is the culprit by bypassing it and connection router #4 to router #2. In the meanwhile, I'm hoping someone can shed some light on this issue.