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Craig_Jackson_2's avatar
Craig_Jackson_2
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Dec 31, 2014

High-bandwidth WAN Best Practices

I'd like to learn what people have found to be best practices for handling modern high-bandwidth network paths to users in faraway places. We serve users worldwide from a site in the Eastern U.S. Our...
application delivery
design
LTM
performance
TMOS
Craig_Jackson_2's avatar
Craig_Jackson_2
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Jan 14, 2015

My F5 VAR (Wendell Richardson at Rutter) has directed me to SOL3422. Re-reading this has increased my confidence that my previous post is correct. That is, the proxy buffer lives between the receive buffer on one side and the send buffer on the other.

 

He also directed me to the original documentation of the "tcp-wan-optimized" TCP Protocol Profile, SOL7405. Re-reading this showed me that the primary motivation for the tcp-wan-optimized profile in 9.4 and above was to allow the LTM to buffer more data, freeing up the server sending the data. However, in 9.1 the "tcp" profile had a default send window of 16kiB, so switching to the "tcp-wan-optimized" profile improved our WAN performance a great deal. (This was at a previous employer.)