Internet throttling speeds in LAN network

internetnetwork-core

Trying to troubleshoot low internet speed. We are paying for 200mb download speed. Our setup is as follows:

Users computer(1GB) -> Phone(100mb switch port) -> Access switch(100mb) -> Core Switch(1GB) -> Firewall(1GB) -> WAN switch(100mb) -> WAN modem(1GB switch port)

Users are only able to get max ~40mb internet speeds. I know we will never get close to 200mb since there are so many devices that are capped at 100mb but is ~40mb realistic? I checked the duplexes and they are all correct and have no issues. I checked the firewall for any bandwidth throttling and there are no rules for this. Can you guys think of what could be causing such low internet speed? Also want to note if I connect a laptop(1GB) to the WAN modem, it gets ~190mb speed, which would imply there is nothing wrong with the modem. Thanks in advance.

Edit:

Here is a diagram of the network:

enter image description here

Best Answer

As mentioned before, your bottleneck is the WAN switch. You'll need to upgrade that device to a higher speed port, or alternatively depending on your security requirements, you could patch your modem into your core switch on an isolated VLAN. Then plug the WAN port from your firewall into another port on the core switch on the same isolated VLAN.

Related Topic