PDF user manual for CopperEdge 150

EncapsulationType = rfc1483FwdMode= IP-PolicyPix = 3Service Class = AIn the example above, class of service on port 24 on the boardoccupying the slot 5 has been set to A, the highest class. Tochange the class of service on any of the other ports, use cmIfaceand change the defaults one at a time.Class of service only comes into play when the CPU on theCE150 becomes congested. At that point, packets from portswith higher classes of service have a greater chance of beingprocessed and passed on to the WAN interface. The higher theclass of service—and the greater the weight of the higherclass—the greater the chance of being processed.3ULRULW\4XHXLQJPreference for delay-sensitive packets transmitted over the DSLport (from the CE150 to the subscriber interface) is providedthrough the Priority Queuing function. This configurationgroup applies only to DSL VCs that are created on the CE150,using the Cross-Connect netmodel. All of the other netmodels—HDIA, IP, VWAN, and CopperVPN—automatically give thesekinds of packets priority in the downstream direction over DSLlinks. But, in the Cross-Connect netmodel, after you have setup the Permanent Virtual Circuits, you have to use cmSubIfaceto set each DSL VC for priority queuing: High for real timepackets such as voice, low for non-real time packets.The default is Low level. For a PVC that has voice packets orvideo conferencing packets and regular IP data packets on it,set the priority level to High. For a PVC with only regular IP datapackets on it, leave the priority level at Low. For example:CRAFT> get cmsubiface [1.4.24.16]Group: cmSubIfaceInstance: [1.4.24.16]PII = 1.4.24.16IfIndex = 1.4.24.16Name =Priority= HighRowStatus= ActiveIn the example above, priority queuing on the 16th PVC on the24th port on the board occupying the 8th slot has been set toHigh priority. To change the default on any of the other PVCsfrom the default (Low priority), you will have to use cmSubIfaceand change the defaults one at a time.Priority queuing, once a PVC has been configured, comes intoplay whenever real time and non-real time packets are sentfrom the CE150 over the PVCs on the DSL port. Real Time packetswill be processed before non-real time packets.&KDSWHU$GYDQFHG&RQILJXUDWLRQ