Hi Kevin, Maybe don't use the ptm keyword, but rather reduce the shaper rates to at most 98.46 percent of the sync rate... On July 24, 2018 4:54:01 PM GMT+02:00, Kevin Darbyshire-Bryant wrote: > > >> On 24 Jul 2018, at 14:51, Dave Taht wrote: >> >> Now that you can join the party, I note there IS a flent server in >england with irtt on it. >> >> flent-london.bufferbloat.net > >Ok, well if you’re desperately interested….. :-) > >Plot I did running to the london server, one shaped at 99% downstream, >the other at 98%…. and I’ve decided to stick at 98% as a result - plot >is a little bit hard to distinguish but I’d say there’s around 8ms avg >less latency-ish between the two. And an order of magnitude between >using london v fremont :-) > >The upstream barely registers > ># tc -s qdisc show dev ifb4eth0 >qdisc cake 801a: root refcnt 2 bandwidth 78400Kbit diffserv3 >dual-dsthost nat ingress split-gso rtt 100.0ms ptm overhead 26 -- Sent from my Android device with K-9 Mail. Please excuse my brevity.