Hi, stef I am measuring the delay and loss rate for MPEG-2 VBR traffic (mean rate is 3Mbit) through MPLS diffserv network, Background traffic is UDP Possion. I have two class, EF for video reserved 5M (inside EF, I use pfifio qdisc), BE for Possion reserved 4M (inside BE, I use RED qdisc) , The link capacity is 10M, when I send 7M or 9M Possion background, I find BE traffic no any loss, it seems RED work well, but my video loss increase when increase background No matter how I change some paramtere, the result is same. alawys video packet dropped, BE no drop. I am wondering RED is good for TCP adaptive traffic, how about UDP? some part of my script is following ( take out from project http://dsmpls.atlantis.rug.ac.be/files/ds_config ## EF class specific setup echo EF $TC class add dev $i parent 2:0 classid 2:5 cbq bandwidth 10Mbit rate 5Mbit \ avpkt 1000 prio 2 bounded allot 1514 weight 0.5Mbit maxburst 10 defmap 0 $TC qdisc add dev $i handle 3:0 parent 2:5 pfifo limit 10 $TC filter add dev $i parent 1:0 prio 1 handle 0x2e tcindex classid 1:151 $TC filter add dev $i parent 2:0 prio 1 handle 5 tcindex classid 2:5 ## BE class specific setup echo BE $TC class add dev $i parent 2:0 classid 2:6 cbq bandwidth 10Mbit rate 4Mbit \ avpkt 1000 prio 7 allot 1514 weight 4Mbit maxburst 21 borrow $TC qdisc add dev $i parent 2:6 handle 4:0 red limit 60KB min 15KB max 45KB burst 20\ avpkt 1000 bandwidth 10Mbit probability 0.4 #$TC filter add dev $i parent 1:0 prio 1 handle 0x0 tcindex classid 1:161 $TC filter add dev $i parent 2:0 prio 1 handle 6 tcindex classid 2:6 ## OSPF - RSVP Pipe class specific setup echo OSPF \& RSVP queue $TC class add dev $i parent 2:0 classid 2:7 cbq bandwidth 10Mbit rate 1Mbit \ avpkt 1000 prio 1 bounded allot 1514 weight 0.1Mbit maxburst 10 defmap 0 $TC qdisc add dev $i handle 9:0 parent 2:7 pfifo limit 10 $TC filter add dev $i parent 1:0 prio 1 handle 0x30 tcindex classid 1:171 $TC filter add dev $i parent 2:0 prio 1 handle 7 tcindex classid 2:7
