[asterisk-users] Re: Asterisk server and DSCP QOS

[Steve Johnson]

Thanks, Darryl,

To clarify:

in /etc/asterisk/sip.conf you have the lines:

tos_sip=cs3                    ; Sets TOS for SIP packets.
tos_audio=ef                   ; Sets TOS for RTP audio packets.

and in your Polycom configuration [I'm using Polycom's sip 2.2.0] you
have something like (this is the one I'm uncertain about):

   <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="184" qos.ip.rtp.min_delay="1"
qos.ip.rtp.max_throughput="1" qos.ip.rtp.max_reliability="0"
qos.ip.rtp.min_cost="0" qos.ip.rtp.precedence="5"/>
         <CallControl qos.ip.callControl.dscp="184"
qos.ip.callControl.min_delay="1" qos.ip.callControl.max_throughput="0"
qos.ip.callControl.max_reliability="0" qos.ip.callControl.min_cost="0"
qos.ip.callControl.precedence="5"/>
      </IP>
   </QOS>

Thanks again!
Steve


Darryl Duncan wrote:

We're using 184 here (aka TOS 5/EF).

Not set by iptables though, instead it is set in sip.conf
(tos_sip/tos_audio) and on our Polycom/Cisco phones.

-----Original Message-----
Subject: [asterisk-users] Asterisk server and DSCP QOS

Can anyone comment on the DSCP quality of service settings on your
Asterisk server?

The network we're setting up has data on the default VLAN, Asterisk
server and phones on VLAN 4, and we're using Polycom phones with a PC
hooked up to the phone's pass-thru port.

What iptables settings are you using on the Asterisk server for DSCP?
What are your Polycom DSCP settings?  We're using the Linksys SGE2000P
POE switch which supports QOS via DSCP.

Thanks a lot for any info.
Steve