I have an issue with my upload speed being extremely slow. I run the speed test, and my download speeds are consistently 50+ Mbps, but my uploads are around 1 Mbps. Ive been on the phone with tech support multiple times and the problem is never resolved, getting fed up with calling and no idea what to do at this point.
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
SendBufferSize set to 
running 10s outbound test (client to server) . . . . . 1.10Mb/s
running 10s inbound test (server to client) . . . . . . 58.04Mb/s
------ Client System Details ------
OS data: Name = Windows 7, Architecture = x86, Version = 6.1
Java data: Vendor = Oracle Corporation, Version = 1.7.0_25
------ Web100 Detailed Analysis ------
Client Receive Window detected at 261340 bytes.
45 Mbps T3/DS3 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Alarm: Duplex mismatch condition found: Host set to Full and Switch set to Half duplexD
Web100 reports the Round trip time = 34.29 msec; the Packet size = 1460 Bytes; and
No packet loss - but packets arrived out-of-order 0.6% of the time
This connection is receiver limited 10.54% of the time.
This connection is sender limited 88.62% of the time.
This connection is network limited 0.83% of the time.
Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: ON
Packet size is preserved End-to-End
Server IP addresses are preserved End-to-End
Client IP address not found. For IE users, modify the Java parameters
click Tools - Internet Options - Security - Custom Level, scroll down to
Microsoft VM - Java permissions and click Custom, click Java Custom Settings
Edit Permissions - Access to all Network Addresses, click Eanble and save changes
I'm in the same boat, in central MA. 20-30Mbps download but upload speeds as low as 100kbps. Verizon's own speed test times out!
I did see in your posting this warning: "Duplex mismatch condition found: Host set to Full and Switch set to Half duplex"
Check your network adapter settings vs. your router settings.