cdxCmCpeIfIndex 1.3.6.1.4.1.9.9.116.1.3.1.1.4

The CMTS cable MAC interface index (ifType of docsCableMaclayer(127)) that cable modem or Customer Premises Equipment connects to. Use cdxCmCpeIfIndex and cdxCmCpeCmtsServiceId to identify an entry in docsIfCmtsServiceTable.