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Re: Consistently low real-world upload speeds (twitch stream, speed tests, etc)

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Nods wrote:

------ Web100 Detailed Analysis ------
Client Receive Window detected at 302080 bytes.
45 Mbps T3/DS3 link found.
*Link set to Half Duplex mode*
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 16.07 msec; the Packet size = 1460 Bytes; and 
There were 123 packets retransmitted, 2270 duplicate acks received, and 2367 SACK blocks received
....



Did you force the packet size.  Its normally 1452 (mtu 1492) for Verizon.  Ideally should also be duplex, but that may not always be possible.

 

Something is causing the abnormal number of resends, sacks, etc reported.  A bad packet size can be the cause or at least agravate this.


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