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ECN (RFC 3168), 1/2
New for Windows Vista
Straightforward to implement
We ran into a number of problems:
IGD problem #1: one of the most popular versions from one of the most popular vendors
When a data packet arrives with either ECT(0) or ECT(1) (indicating successful ECN capability negotiation) indicated, router crashed
Cannot be recovered at TCP layer
IGD problem #2: multiple popular vendors with popular models
When the 3-way handshake completes, prior to any data being sent, router hit a bug causing further packet loss
Easily detected and recovered at TCP layer
PPT Version