[asterisk-users] TOS bits, DSCP, Asterisk & Polycom

[Doug]

At 09:51 2/7/2010, Vinícius Fontes wrote:
 >You want to set it like this on Asterisk:
 >
 >tos_sip=cs3
 >tos_audio=ef
 >tos_video=cs4

Why cs4 instead of af41?


 >
 >And in Polycom config:
 >
 >qos.ip.rtp.dscp="EF"
 >qos.ip.callControl.dscp="24"

Thanks, Vinícius, but this is for Asterisk v1.4,
yes?

The current production system is v1.2.



 >
 >
 >Atenciosamente,
 >
 >Vinícius Fontes
 >Gerente de Segurança da Informação
 >Canall Tecnologia em Comunicações
 >Passo Fundo - RS - Brasil
 >+55 54 2104-7000
 >
 >Information Security Manager
 >Canall Tecnologia em Comunicações
 >Passo Fundo - RS - Brazil
 >+55 54 2104-7000
 >
 >----- "Doug" <Doug at NaTel.net> escreveu:
 >
 >> Has anyone figured this out yet?
 >>
 >> Lots of places say to add the following
 >> to sip.conf of an Asterisk 1.2 system
 >> (current production machine/Asterisk as root):
 >>
 >>    tos=0xB8
 >>
 >>    (Hex B8 = Decimal 184 = Binary 10111000)
 >>
 >> or if you are running Asterisk v1.4 or newer:
 >>
 >>    tos_sip=cs3          ; Sets TOS for SIP packets.
 >>    tos_audio=ef         ; Sets TOS for RTP audio packets.
 >>    tos_video=af41       ; Sets TOS for RTP video packets.
 >>
 >>
 >> To match the current 1.2 machine would I set the Polycom's
 >> sip.cfg to the first or second QOS option?
 >>
 >> Option 1:
 >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >>     <QOS>
 >>        <Ethernet>
 >>           <RTP
 >>             qos.ethernet.rtp.user_priority="5"/>
 >>           <CallControl
 >>             qos.ethernet.callControl.user_priority="5"/>
 >>           <Other qos.ethernet.other.user_priority="2"/>
 >>        </Ethernet>
 >>
 >>        <IP>
 >>           <RTP
 >>             qos.ip.rtp.dscp=""
 >>             qos.ip.rtp.min_delay="1"
 >>             qos.ip.rtp.max_throughput="1"
 >>             qos.ip.rtp.max_reliability="1"
 >>             qos.ip.rtp.min_cost="0"
 >>             qos.ip.rtp.precedence="5"/>
 >>
 >>           <CallControl
 >>             qos.ip.callControl.dscp=""
 >>             qos.ip.callControl.min_delay="1"
 >>             qos.ip.callControl.max_throughput="1"
 >>             qos.ip.callControl.max_reliability="1"
 >>             qos.ip.callControl.min_cost="0"
 >>             qos.ip.callControl.precedence="5"/>
 >>        </IP>
 >>     </QOS>
 >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >>
 >>
 >> Option 2:
 >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >>     <QOS>
 >>        <Ethernet>
 >>           <RTP
 >>             qos.ethernet.rtp.user_priority="5"/>
 >>           <CallControl
 >>             qos.ethernet.callControl.user_priority="5"/>
 >>           <Other qos.ethernet.other.user_priority="2"/>
 >>        </Ethernet>
 >>
 >>        <IP>
 >>           <RTP
 >>             qos.ip.rtp.dscp="ef"
 >>             qos.ip.rtp.min_delay="1"
 >>             qos.ip.rtp.max_throughput="1"
 >>             qos.ip.rtp.max_reliability="1"
 >>             qos.ip.rtp.min_cost="0"
 >>             qos.ip.rtp.precedence="5"/>
 >>
 >>           <CallControl
 >>             qos.ip.callControl.dscp="ef"
 >>             qos.ip.callControl.min_delay="1"
 >>             qos.ip.callControl.max_throughput="1"
 >>             qos.ip.callControl.max_reliability="1"
 >>             qos.ip.callControl.min_cost="0"
 >>             qos.ip.callControl.precedence="5"/>
 >>        </IP>
 >>     </QOS>
 >> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 >>
 >> or none of the above?
 >>
 >> Also, how does "10111000" Fit into:
 >>
 >>                [ 0   1   2  ]  [3]  [4]  [5]  [6       7]
 >>                [ Precedence ]  [D]  [T]  [R]  [ECN Field]
 >>
 >> Is it read backwards?
 >>
 >> Any helpful comments appreciated.
 >>
 >> References:
 >>
 >>    <http://en.wikipedia.org/wiki/Type_of_Service#Type_of_Service>
 >>
 >>
 >>
 ><http://en.wikipedia.org/wiki/DiffServ#Expedited_Forwarding_.28EF.29_P>HB_-_DSCP.3D.2846_OR_101110.29>
 >>
 >>    <http://www.voip-info.org/tiki-index.php?page=Asterisk+sip+tos>
 >>
 >>
 >>
 ><http://www.polycom.com/global/documents/support/setup_maintenance/pro>ducts/voice/SoundPointIP_SoundStationIP_AdminGuide_SIP3_0_Eng_Rev_A.pdf>
 >>
 >>
 >>
 >>
 >>
 >> --
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