Been running a cake cobolt from april for some time using

tc qdisc add dev ppp0 handle 1:0 root cake bandwidth 19690kbit raw overhead 34 diffserv4 dual-srchost nat rtt 200ms

tc -s qdisc ls dev ppp0 (ppp0 is pppoe)

qdisc cake 1: root refcnt 2 bandwidth 19690Kbit diffserv4 dual-srchost nat rtt 200.0ms noatm overhead 56 via-ethernet

Which is backed off a couple of kbit and tests well (overhead 33 + udp flood is over limit)

With current cobalt + current tc the same command is under rate - I don't know if its rate calculation or overheads calc changed.

overhead 20 (-14) is still under but overhead 12 (-22) is over.

I was hoping one of those would be correct, but no.

Any ideas/known changes?

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