On Sun, May 31, 2009 at 3:58 PM, Jeppe Øland<jol...@gmail.com> wrote: > >> > So... if a priorice a host over alll, why if I do a >> > ping from the priorized hots I have 27 millisenconds, >> > but when from othre host in the LAN I upload a file, >> > the latency of the icmp grows to 220-270? >> > >> > >> > Yes that is normal. >> > Unless you also set ICMP to use a high-priority queue, it will >> > go in the same queue as the upload. >> > VOIP should still go in the high priority one. >> >> But I priorize a entire host... >> >> I priorize the thost 192.168.1.1, I upload a file from host 192.168.1.12 >> to internet, and theping in 192.168.1.11 increases a lot... >> >> If I set the rule, that says "all the traffica originated from >> 192.168.1.11" it includes ICMP to... > > Ah yes I missed that bit. > > Indeed in that case I would say you should probably see *some* increase in > latency - but +250 ms seems too high.
Here's the explanation I was looking for, from the m0n0wall FAQ (http://doc.m0n0.ch/handbook/faq-ackprio.html) "despite ACK prioritization, the delay will still go up, as it is not possible to stop sending a big packet mid-way. For example, a full-size (1500 bytes) packet at 100 kbps will take 120 ms" It explains an increase in latency, but 250 ms still sounds like too much, unless your uplink is slower than 100 kbps, or the mtu is greater than 1500 bytes. Neither seems very likely. I would have to reiterate the advice to check that your WAN root queue isn't set too high, which would cause you to lose control of your egress queue to the modem and totally negate the benefits of the shaper. db --------------------------------------------------------------------- To unsubscribe, e-mail: support-unsubscr...@pfsense.com For additional commands, e-mail: support-h...@pfsense.com Commercial support available - https://portal.pfsense.org
