PDF user manual for CopperEdge 150

'6/9RLFHDQG'DWD6HUYLFHIn addition to conventional packet data traffic, the CE150 canaccommodate voice over IP and other types of real time IP traffic,such as video conferencing. These real time packets andnon-real time packets can coexist within the CE150, and bothtypes of signals can share the composite data stream over DSLports and WAN ports.Both types of packets can also flow simultaneously over any ofthe CE150’s Virtual Circuits: ATM, Frame Relay, or DSL. To optimizevoice performance in this mixed environment, the CE150provides for the assignment of various levels of priority to delaysensitive,real time packets over non-real time packets.Separate mechanisms are used for allocating priorities to trafficreceived over the DSL port (Class of Service), and traffic transmittedover the DSL port (Priority Queuing) without regard tothe data rates on the various DSL links.&ODVVRI6HUYLFHThis function applies to packets received by the DSL ports onthe CE150. It allows you to assign a level or class of service toeach of the DSL ports, using cmIface. When you indicate thenetmodel, the net mask, and the IP address for a DSL port, youalso can enter a class of service for it. Typically, you will give aDSL port carrying voice a higher level of service than a DSL portcarrying regular IP data traffic.The CE150 allows you to set four levels of service: A, B, C, andD, where A is the highest class and D is the lowest. The defaultis D. The relative weight of each of the levels or classes is configuredusing the cmServiceClass MIB group. For more informationon how these relative weights are derived, and how theyaffect their assigned interfaces, see the description in the cm-ServiceClass MIB group definition in the CopperEdge 150 CopperCraftReference and MIB Definitions manual.Once configured, the value selected as the weight for a particularclass of service is the same for that class for every DSL portto which it is applied. For example:CRAFT> get cmiface [1.5.24]Group: cmIfaceTableInstance: [1.5.24.0]PII = 1.5.24.0IfIndex = 1.5.24.0Name = ....GroupName = ....AdditionalInfo = ....NetModel= IPIpAddr = 172.20.1.2NetMask = 255.255.255.0MacAddr = 0.60.58.1.0.76BurnedInMacAddr = 0.60.58.1.0.76FarEndAddr = 0.0.0.0DestPii = 1.2.1.43CMCPCompatible = Yes&RSSHU(GJH,QVWDOODWLRQDQG2SHUDWLQJ*XLGH