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DOCSIS 1.1 Config File for VoIP

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astrit
DOCSIS 1.1 Config File for VoIP

Hi List,

If anybody can send a sample config file for Voice packet prioritization?

I've made one config file who creates 4 service flows, 2 of them are for
10.44.240.0/20 which is our VoIP Subnet. I just wanted to see yours idea for packet prioritization.

Here is my config file :

Main
{
NetworkAccess 1;
SwUpgradeFilename "dpx2203-v202r1151-050224b-5.bin";
SwUpgradeServer 10.44.16.3;
UpstreamChannelId 33;
DownstreamFrequency 566000000;
MaxCPE 5;
GlobalPrivacyEnable 0;

UsServiceFlow
{
UsServiceFlowRef 1;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 256000;
}

UsServiceFlow
{
UsServiceFlowRef 3;
QosParamSetType 7;
TrafficPriority 7;
MaxRateSustained 128000;
MinReservedRate 128000;
}

DsServiceFlow
{
DsServiceFlowRef 2;
QosParamSetType 7;
TrafficPriority 1;
MaxRateSustained 1024000;
}

DsServiceFlow
{
DsServiceFlowRef 4;
QosParamSetType 7;
TrafficPriority 7;
MaxRateSustained 128000;
MinReservedRate 128000;
}

UsPacketClass
{
ClassifierRef 13;
ServiceFlowRef 3;
RulePriority 8;
ActivationState 1;
IpPacketClassifier
{
IpSrcAddr 10.44.240.0;
IpSrcMask 255.255.240.0;
}
}

DsPacketClass
{
ClassifierRef 14;
ServiceFlowRef 4;
RulePriority 8;
ActivationState 1;
IpPacketClassifier
{
IpSrcAddr 10.44.240.0;
IpSrcMask 255.255.240.0;
}
}

Also I want to know if you've configured anything in CMTS like :
admission-control, congestion-control or traffic-scheduling.

Regards,
Astrit Morina

astrit
DOCSIS 1.1 Config File for VoIP

Please, if there is anybody who deals with VoIP cable modems, and VoIP prioritization that could tell me some basic steps to do; configuration files, rules on CMTS-es etc.

Thanks,
Astrit.

wittmann
DOCSIS 1.1 Config File for VoIP

Hello astrit,

which protocol for voice are you using? MGCP/NCS or SIP. Use you Cablemodem with eMTA and Packetcable?

What i mean is, if you using CM with eMTA und Packetcable the voice-rtp-traffic will use dQOS-enabled UGS-ServiceFlows with DSX-Messages and the only traffic you should make a priorisation are for DSX-Messages.

astrit
DOCSIS 1.1 Config File for VoIP

Actually we are using MGCP as voice protocol, and Scientific Atlanta Webstar CM with eMTA, and Juniper G1 CMTS. We plan also to use SIP in the near future maybe. As you can see I've made a config file which prioritize the IP subnet (10.44.240.0/20) wich is our voice IP subnet. But I wanted any other good sample from people with experience in VoIP. If you have one please send it to me.

Regards,
Astrit.

wittmann
DOCSIS 1.1 Config File for VoIP

Is PacketCable on the Juniper G1 CMTS not available?
If you use the WebSTAR DPX2203 or EPX2203, the eMTA can sent over the CM DSX-Messages to enable dynamic ServiceFlows if RTP-Traffic is in use and no secondary ServiceFlows in the CM-Configfile is needed.

astrit
DOCSIS 1.1 Config File for VoIP

So you meant if packetcable is available in Juniper G1, it will work automatically or I should add some lines in CMs configuration files. Tell me how you deal with VoIP QoS to your customers, please?

Best Regards
Astritm.

wittmann
DOCSIS 1.1 Config File for VoIP

Hello astrit,

yes, if the CMTS is support PacketCable, dynamic ServiceFlows for RTP-Traffic between CM/eMTA and CMTS are available.

At the moment we flag the RTP-Traffic from our external SIP-ATA's with a TOS-Value if the PacketClassifier is match and use a secondary serviceflow. Unfortunately BestEffort ScheduleType :(. This ATA's don't use PacketCable, but this problem we will fixing in future with a policy server solution.

In my old Company there using PacketCable with dQoS and no extra serviceflow-entrys in the CM configfile was needed.

Facts, if you using PacketCable eMTA, you don't need secondary ServiceFlows for Voice by the CM configfile but you should create secondary ServiceFlows where match to the DSX-Messages, e.g 60kbit.