Hi,
Sorry to bother you
all. I have a typical problem sharing DSL upstream bandwidth with users. I have
3 types of traffic high-priority, medium-priority and low priority. My upstream
rate is 960kbits. Traffic (any priority) can vary in bandwidth from 0 to
960kbits. I have a test setup where I can pump 600kbit of high priority
sustained and I have 400kbit of low priority traffic sustained. I expect after
the 600kbit high-priority traffic, the remaining 360kbit should be allocated to
the medium and low priority. Since I do not have medium-priority everything
should go to low-priority traffic. However, I do not see that behavior with the
following tc script I have
----------- Begin
Script -------------
# delete any
existing qdiscs
tc qdisc del dev
ppp0 root
# setup PRIO qdisc
with 3 bands
tc qdisc add dev
ppp0 root handle 1: prio band 3 priomap 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0
# filter traffic for
high priority based on TOS field
tc filter add dev
ppp0 parent 1:0 prio 1 protocol ip u32 match ip tos 0x28 0xff flowid
1:1
tc filter add dev
ppp0 parent 1:0 prio 1 protocol ip u32 match ip tos 0x48 0xff flowid
1:2
tc filter add dev
ppp0 parent 1:0 prio 1 protocol ip u32 match ip tos 0x58 0xff flowid
1:3
# use ebtables to
set the TOS field. First flush the rules
ebtables -t broute
-F
ebtables -t broute
-I BROUTING 1 -j ftos --set-ftos 0x28 -p IPv4 --ip-src
192.168.1.151/32
ebtables -t broute
-I BROUTING 2 -j ftos --set-ftos 0x48 -p IPv4 --ip-src
192.168.1.152/32
ebtables -t broute
-I BROUTING 3 -j ftos --set-ftos 0x58 -p IPv4 --ip-src
192.168.1.153/32
----------- End
Script ------------------
What I see is the
high priority traffic is leaving at 600kbits as I measure it on my test
equipment. However, I do not see any low-priority or medium-priority traffic
coming out of the box. I
would appreciate if you folks can please give me a hint as to what is happening
and also any possible solutions. I need hard PRIO but the unused bandwidth
should be shared by the other traffic. I am using Linux kernel 2.6.8.1 and
iproute2 (iproute2-2.6.8-ss040730.tar.gz).
Regards,
Pavan
Kumar
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