On Wed, 5 Sep 2001, Eric Van Buggenhaut wrote: > On Sun, Sep 02, 2001 at 12:56:18AM +0200, Tomas Pospisek wrote: > > > > It's not only *sites* that do not work with ECN. It's also *routers*. That > > means if you have *one* router between you and your destination, that does > > not > > support ECN, then you'll get *very* strange behaveour like hanging TCP > > connections that somehow get halfway through but do hang never the less > > while > > ping works. Please check my bugreport #110862. And amongst the broken > > equipment > > are f.ex. (older?) Zyxel ISDN routers which are *very* popular. > > FYI, > > Zyxel 681 SDSL-Router breaks ECN by stripping 0x80 (ECN Cwnd Reduced) but > not 0x40 (ECN Echo) (TOS bits) on all SYN > packets. This is the last official firmware. A beta firmware is available > internally which fixes this issue: (ZyXEL > firmware v2.50(T.05)b6 | 03/28/2001)
So it's not only old routers. It's also new ones. Zyxel didn't get it. But until this day Debian didn't get it either. Whoever owns a Zyxel router that has this bug will be into troubles with Debian unless s/he's a netwoking nerd that knows about ECN. Go figure. And while we're at it - if you happen to stumble accross a firmware-fix for the Zyxel Prestige 2864i please point me to it. Because untill I fix that, one of our customers will be runing a broken network. *t ---------------------------------------------------------------------------- Tomas Pospisek SourcePole - Linux & Open Source Solutions http://sourcepole.ch Elestastrasse 18, 7310 Bad Ragaz, Switzerland Tel: +41 (81) 330 77 11 ----------------------------------------------------------------------------