More correct form of question:
How to detect retransmitted TCP packets (&ACK &no, if different)?
Interesting for iptables rule for it.
It may be nice for input traffic smoothing. Now I use sch_psp
(http://www.gridmpi.org/pspacer-1.0/index.en.jsp - version 1.0.2 have
bugs and hung on some actions with tc on my systems - RH & Gentoo with
own overoptimized kernels, but main goal - scheduling - work fine). Now
I use next scheme (pure 4example):
tc qdisc add dev eth0 root handle 1: psp default 2 rate 100Mbit
tc class add dev eth0 parent 1: classid 1:1 psp rate 10Mbit mode 1
tc class add dev eth0 parent 1:1 classid 1:10 psp mode 0
tc class add dev eth0 parent 1:1 classid 1:20 psp mode 0
tc class add dev eth0 parent 1: classid 1:2 psp mode 0
Into class 1:10 I move ACK packets of shaped part of traffic (now -
experemental - "-m state --state new" also - looks fine), into class
1:20 - other shaped traffic. Now I want to exclude from 1:10
retransmitted ACKs and get only effective ACK traffic rate estimation.
All this actions have sense of smoothing/shaping of input TCP traffic
without direct rate estimation.
--
WBR,
Denis Kaganovich, mahatma@xxxxx http://mahatma.bspu.unibel.by
