On Sun, Nov 20, 2016 at 11:43:54PM +0100, Stefan Sperling wrote: > Linux uses 60 retries for Block Ack Requests, which makes some sense (they > are not sent often, but usually periodically, and are used to negotiate an > agreement to set up and use block ack).
Oops, sorry, I confused Block Ack Requests (BAR) with ADDBA Requests here! So the reason 60 retries make sense for a BAR frame is that this frame is used to elicit a Block Ack (list of ACKs) from the peer, when Tx can't advance any further due to outstanding ACKs. Without ACKs, the sender's only options are to retry or, eventually, discard frames in the current window. So getting this list of ACKs ASAP is important.
