PDF user manual for CopperEdge 150

7KHFP,IDFH7DEOHAt the center of all user data processing configuration is a singletable: the cmIfaceTable (often abbreviated cmIface). All userdataconfiguration starts with the cmIface table. In some cases,several other support tables augment the cmIface table. Buteach support table is needed only in some configurations, andonly for some functions. Different applications and interfacesuse different support tables.The cmIface table consists of many rows, or instances, of cmIfaceentries. Each entry configures a single interface, and insome cases, connects one interface to another. Each entry consistsof several objects. The exact usage of the objects is highlydependent on what kind of interface is being configured, and onwhich netmodel you choose for user-data processing.In all cases, a single cmIface entry configures a DSL port, a DSLvoice circuit, an Ethernet port, or a WAN virtual circuit.Permanent Interface IdentifierThe cmIface table is indexed by a Permanent Interface Identifier(PII). This means each cmIface entry is uniquely identified by itsPII. A single PII can have no more than one cmIface entry. Notethat PIIs are used for other purposes besides the cmIface table,so not all PIIs in the system have a cmIface entry.PIIs are called permanent because they do not change acrosspower cycles of the CE150, and the PII for an interface does notchange as a result of any configuration of other interfaces. EachDSL port, Ethernet port, and WAN VC is uniquely identified bya PII. In some cases, the CE150 may require some enablingconfiguration to make the PIIs for some VCs valid; not all PIIsare necessarily valid with all configurations. The CE150 enforcesany requisite configuration by disallowing the use of PIIs thatare not currently valid. PIIs are unique across all interfaces ina single CopperEdge chassis.The PII format is completely described elsewhere, but briefly, aPII is a sequence of one to four decimal numbers separated byperiods. The four numbers are the chassis, slot, port, and circuitID of the interface. For example, 1.3.1.99 is the PII forchassis 1, slot 3, port 1, (virtual) circuit ID 99. While a PII sometimesresembles an IP address, PIIs are totally different andshould not be confused with IP addresses.&RSSHU(GJH,QVWDOODWLRQDQG2SHUDWLQJ*XLGH