[FS#294] linksys 1200ac (and most likely other mvneta) has a multi-flow lockout problem

[LEDE Bugs]

The following task has a new comment added:

FS#294 - linksys 1200ac (and most likely other mvneta) has a multi-flow lockout problem
User who did this - Dave Täht (dtaht)

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Nope. Not fixed. Tried the Dec 23 build just now. I hit it with > 4 flows, it locks out everything else.

(The way I was dealing with it was with running cake at 900mbit on the
internal ethernet using sqm - which works great, aside from burning a ton of cpu). 

I guess it's one way around bugs like this....

Example test using 12 flows from flent and netperf on the router:

root at apu2:~/t# flent -H 172.26.64.1 -t 'isitfixed'
--te=download_streams=12 tcp_ndown

Warning: Program exited non-zero (1).
Command: /usr/bin/netperf -P 0 -v 0 -D -0.20 -4  -H 172.26.64.1 -t
TCP_MAERTS -l 60 -f m   --   -H 172.26.64.1
Program output:
  netperf: send_omni: connect_data_socket failed: No route to host

Warning: Command produced no valid data.
Data series: TCP download::5
Runner: NetperfDemoRunner
Command: /usr/bin/netperf -P 0 -v 0 -D -0.20 -4  -H 172.26.64.1 -t
TCP_MAERTS -l 60 -f m   --   -H 172.26.64.1
Standard error output:
  netperf: send_omni: connect_data_socket failed: No route to host



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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=294#comment1079