Dave Taht wrote:
One thing the original sqm-scripts did (with fq_codel) was explicitly
deprioritize ping with a filter.
I had written in my original "wondershaper must die" rant how stupid
it was to prioritize ping upwards to "impress your friends" - as that
was the case in many, many a wshaper implementation I'd seen.
I only just now noticed that rant does not have the images inline.
"Oh, man, ping's prioritized:"
https://www.bufferbloat.net/projects/attachments/131229050304_wshaper-800-220.svg
As for explicit depriorization, well, I took a lot of flack from some
ietfers about lowering it below best effort, and I felt the additional
classification needed was excessive for cake, directly. Some OSes
already do mark it with a background class. I still think it's a good
idea as it makes ping floods against (for example) your entire 10.
network (which happened to me under worm attack once) - vanish.
Yea, fair point, but in this case it's just a simulation tool as I don't
know how to get delay times from a udp stream.
I still think cs4 should go to voice on diffserv3 as it does on diffserv4.
Another observation with flent udp_flood, I notice that
flent-london.bufferbloat.net
is tcp only, is this intended? The test still works, despite the port
unreachables coming back, just no bandwidth reading.
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