I am created bi-directional G711 calls between UAC and UAS using the following
commands:
UAC (IP 192.168.0.3): ./sipp -sf uacG711alaw.xml 192.168.0.2 -users 2 -mi
192.168.0.3 -i 192.168.0.3 -max_socket 65535 -t un
UAS (IP 192.168.0.2): ./sipp -sn uasG711alaw.xml -mi 192.168.0.2 -i
192.168.0.2 -t un
Now I am enabling QoS using the following commands:
iptables -t mangle -A OUTPUT -p udp -m udp --sport 5060 -j DSCP
--set-dscp-class cs3 # mark SIP UDP packets with CS3
iptables -t mangle -A OUTPUT -p udp -m udp --sport 6000:8887 -j DSCP
--set-dscp-class ef # mark RTP packets with EF
iptables -t mangle -A OUTPUT -p udp -m udp --sport 8888:65535 -j DSCP
--set-dscp-class cs3 # mark local control port number and onwards with CS3
My questions is the following:
1) As you can notice I am using the '-t un' option to open one UDP socket for
each call. For example this means that calls generated by the UAC can use a SIP
port such as 50000, however I noticed that the UAS is using SIP port 5060 for
all calls. Is that normal?
2) In regards to applying QoS, am I correct assigning DSCP value CS3 to ports
ranging from 8888 to 65535?
Thanks,
Antoine
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