Knowledge Base - FAQ

Truespeed Layer 4 Testing Multiple connections

Tuesday, December 31, 2019
Submitted by ryan.grace on October 23, 2021 - 6:45pm
Question: 
Recommendations on the number of TCP connections in Truespeed Layer 4 testing when using the Troubleshooting mode and manual configuration.
Answer: 
If the user would like to use multiples TCP connections and is looking for a recommedation then a good rule of thumb is use 64 KB connections. BDP = Link speed * RTT / 8 bytes Then divide the BDP into 64,000 bytes to get number of connections to use. This is not a requirement just a general recommendation.There are a set of rules for BDP and how convert to connection size on automatic TrueSpeed Test. Here is a snippet of the table: BDP                                      Connection size64 KB – 128KB                   16 KB129 KB – 256 KB                32 KB257 KB – 512 KB                64 KB 

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