FPR1010 (WAN) Throughput slow as a snail

[TheGoob]

Hello

I am having some major throughput issues with my WAN (Internet access).

My original software was 7.0.1, I then upgraded to 7.1.0-90 and same thing.

My FPR is configured in PPPoE

I have 0 configuration (so no misconfiguration)

Here is the weird thing.

No matter what IP or Port I use, or device (any of my 2 pc's or laptop) I get snail slow speeds. I mean if I do speed test, it just sits for 30 or so seconds and then will begin, to less than good speeds.

The funny thing? I have a Cisco Mesh network that grabs an IP from same ports I used with ethernet, and connects and FLY'S! Speed test is within milliseconds and fast.

I can not possibly see how data would flow better for wifi especially when using same LAN Ports.

Something is slowing my physical connections to a halt, yet if wifi plugs in same ports, works.

I have done this 1 at a time, and on each variation of ports.

[marce1000]

 - FYI : https://www.cisco.com/c/en/us/support/docs/ip/transmission-control-protocol-tcp/200932-Ethernet-MTU-and-TCP-MSS-Adjustment-Conc.html

 M.

[TheGoob]

Upon reading this it makes complete and absolute sense. I am excited to go home and try it and get everything working.

I recently moved over to FTD from ASA and it is quite the learning curve... Are the commands within the document compatible with the FTD CLI or will I need to adjust anything?

As in, 

1. Enable

2. Configure Terminal

3. Interface Type Number

4. Ip tcp adjust-mss max-segment-size // Adjusts the MSS value of TCP SYN packets that goes through a router. The max-segment-size argument is the maximum segment size, in bytes. The range is from 500 to 1460.

5. Ip mtu bytes // Sets the MTU size of IP packets, in bytes, sent on an interface.

6. End

[marce1000]

            >...Are the commands within the document compatible with the FTD CLI or will I need to adjust anything? 

 - Not sure about  that , you will have to test , if you can't get similar commands going on that platform, post a query about it in : https://community.cisco.com/t5/network-security/bd-p/discussions-network-security

 M.