Network Diagnostic Tool (NDT)
Duplex-Mismatch detection update

Motivation for work

Mismatches can occur anywhere

Typical Campus infrastructure

Ethernet transmission strategy

Duplex Mismatch Detection

Test environment

Results for TCP flows

Analytical Loss-Model
Loss vs Transmission rate

TCP Operation on LAN

Four Cases of Duplex Setting

Duplex Mismatch
Switch is Full & Host is Half

Tentative Mismatch Detection

Duplex Mismatch
Switch is Half & Host is Full

Tentative Mismatch Detection

Next Steps

Availability