Hi Dave, hi Toke,
On Jun 16, 2013, at 22:57 , Dave Taht <[email protected]> wrote: > On Sun, Jun 16, 2013 at 1:55 PM, Toke Høiland-Jørgensen <[email protected]> wrote: >> Sebastian Moeller <[email protected]> writes: >> >>> As far as I can tell at least VDSL typically means VDSL2 and that >>> probably means PTM instead of ATM. In essence this means you do not >>> have to deal with ATMs 48 payload bytes per 53 byte cell transport >>> inefficiencies. So all you need to deal with is per packet overhead. >>> Then again I am sure you probably know that already. (Sidenote, as far >>> as I understand (so not very far) using ATM for DSL connections with >>> POTS service in the lower frequency range never made much sense at >>> all, the 5 byte ATM header typically was constant and by that just >>> ballast and the 48 byte quantization on the last mile never came with >>> any benefits, but I digress) >> >> Right, thanks. So that means the overhead is constant per (ethernet) >> package? > > So what's the MTU on VSDL2? Is PPPOE used? Easy to figure out empirically by hand, by finding the largest ping packet size that still passes without fragmentation (see http://www.debian.org/doc/manuals/debian-reference/ch05.en.html#_finding_optimal_mtu) Best Sebastian > >> -Toke > > > > -- > Dave Täht > > Fixing bufferbloat with cerowrt: > http://www.teklibre.com/cerowrt/subscribe.html _______________________________________________ Cerowrt-devel mailing list [email protected] https://lists.bufferbloat.net/listinfo/cerowrt-devel
