Thanks to all that replied. Trial and error it is ... I'm now waiting (22 hours later) for it to break again after I changed the priority on the "default" catch-all class. It lasted five days before.
I'm looking at CBQ but it's not at all friendly relative to HTB. If I'm forced to go down the proprietary traffic-shaping route. What's good for really cheap gigabit, redundant, high throughput (including during 64-byte UDP attacks) shapers ? Suggestions appreciated. Chris 2009/12/9 Nickola Kolev <ni...@mnet.bg> > На Wed, 09 Dec 2009 06:38:31 +0000 > gordon b slater <gordsla...@ieee.org> написа: > > > On Wed, 2009-12-09 at 08:02 +0200, Bazy wrote: > > > > > Hi Chris, > > > > > > Try setting txqueuelen to 1000 on the interfaces and see if you > > > still get a lot of packet loss. > > > > > > > Yes, good point and well worth a try. Rereading Chris's post about > > "250Mbps" and "forty queues", the "egress" could well be bumping the > > end of a default fifo line. > > > > If 1000 is too high for your kit try pushing it upwards gradually from > > the default of 100 (?) but back off if you get drops or strangeness in > > ifconfig output on the egress i/f. > > The default *is* 1000. From the ifconfig man page: > > txqueuelen length > > Set the length of the transmit queue of the device. It is useful to > set this to small values for slower devices with a high atency (modem > links, ISDN) to prevent fast bulk transfers from disturbing interactive > traffic like telnet too much. > > So, if you should touch it if and only if you want to have (supposedly) > finer grained control on queueing, as the hardware device also does > some reordering before it puts the data on the wire. > > > I append grep-ped ifconfig outputs into a file every hour on a cron > > job until I'm happy that strangeness doesn't happen, they never do > > when you're watching sadly. > > > > TC problems aren't always about the TC itself, the physical interfaces > > are inherently part of the "system", as my long rambling 5am+ > > up-all-night-over-ssh post about reseating NICs was trying to hint > > at. > > > > Nice one Bazy > > > > Gord > > > > > > > > > > > > > -- > Regards, > Nickola > >