Hi Sebastian, > On Jul 7, 2016, at 11:55 AM, moeller0 <moell...@gmx.de> wrote: > > I see that there is a link to https://wiki.openwrt.org/doc/howto/sqm on > this page, and that reminds me, could you add a link to > https://github.com/moeller0/ATM_overhead_detector to that openwrt page > please? Probably in the section titled “Link Layer Adaptation - the details…” > Here is a quick draft: > > For true ATM links one often can measure the real per packet overhead > empirically, see https://github.com/moeller0/ATM_overhead_detector for > further information how to do that. > > And while at it the following might also need a small upgrade: > original: “SQM can also account for the overhead imposed by "Ethernet with > overhead" (mostly VDSL) links. Cable Modem, Fiber, and direct Ethernet > connections generally do not need any kind of link layer adaptation." > > proposal: "SQM can also account for the overhead imposed by "Ethernet with > overhead" (mostly VDSL) links. Cable Modems (docsis) are known to typically > use 28 Byte of overhead in the upstream direction but only 14 in the > downstream direction. If your version of SQM only supports to specify one > value for the overhead, select 28 Bytes… Fiber, and direct Ethernet > connections generally do not need any kind of link layer adaptation.” > > Thanks to Greg we learned something about docsis and it would be a pity > not to pass this information on to our users… (Note to self I need to allow > independent overhead control for ingress and egress in sqm-scripts and the > GUI).
I took a stab at it. Let me know if I got it right: https://wiki.openwrt.org/doc/howto/sqm#sqmlink_layer_adaptation_tab Thanks. Rich _______________________________________________ Bloat mailing list Bloat@lists.bufferbloat.net https://lists.bufferbloat.net/listinfo/bloat
