SMB - Dell environment with slow Ethernet speed on WD15 and D6000

[tmasazo]

3.Dell
-dell k17a
-Driver 10.5.919.2015 realtek USB GbE - NETWORK Driver
-Latitude 5280
-Firmware 1.6.4

-Found a forum post in the Dell support forums about TB16 docking stations not getting full speed, showing them connected at 1 gig but on a 250 mbps ISP connection toping at 83 mbps.
-There was suggestion of updating the ethernet firmware to Version 1.2.0.2, A00
-I checkd the firmware I used and it was FW_UPGRADE_UTILITY_WD15_V1_2_0_3_ZPE
-The forum was showing to use FW_UPGRADE_UTILITY_WD15_V1_2_0_2_ZPE.exe
-Went and updated the firmware on this laptops K17A but still no luck
-Showing 1 gig connection but only getting 8mbps/8mbps on a 80 mbps fiber connect
-Move cable over to the laptop ethernet bypassing the docking station and get full 80mbps

[tmasazo]

2.Dell
D6000
-Driver 8.3.1728.0 Display Link Corp - NETWORK Driver
-Windows Pro 1709 OSbuild 16299.461
-Latitude 5280
-Firmware 1.6.4
-Primary: DELL P2312H
-Secondary: DELL P2312H
-When connected to D6000 ethernet speeds are 500kbps-8mbps down
-When connected to the laptop Ethernet get full 80mbps down

-Ran speed test from Latitude and getting 8mbps down
-Noticed they had the Latitude 5280 connected with USB 3.0 instead of USB C
-Connected my Precision 3510 and ran speed test 8mbps down
-Moved from USB 3.0 to USB C on latitude 5280 and ran speed Test
-68.7mbps/41.48 mbps
-Ran the DisplayLink Support tool and "Gather support information"
-Set DisplaySupport to on and rebooted
-Installed DisplayLink USB Graphics Software for Windows 8.5 M1
-Ran "Gather Support information" then disabled debug gathering
-Ran Speed test once more on Latitude 5280 connected with USB C and getting full Speeds