Quote:
Originally Posted by qasdfdsaq
......Best-case involves ACK suppression (VM don't bother with this) SACK's, zero packet loss and large RWINs that reduce ACK overhead to well under 1%.
The 1.5% - 3.0% overhead I quote is for typical real-world scenarios.
.......
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AFAIK, VM used TAS (Ack Suppression) in the form of Turbodox. I don't know the poosition now, but I imagine it could still be in use. Here is a supporting quote from Mark Wilkin in September 2010:
We've just released the new 12.01 firmware update for VM300 Cable Modems across our network.
The new firmware was tested over the past 8 weeks with 2000 customers including volunteers from this forum and we've seen no significant issues in testing.
The new firmware enables 100Mbps throughput for our forthcoming 100Mbps service and is also designed to improve upstream stability and throughput. It also turns back on the TDOX feature that was switched off in July with the 10.12 firmware, due to a bug affecting performance.
BTW, note VM saying that the VMNG300 was fit for 100 meg.