How It Works The Monitor Subscriber feature is discussed in detail in the following sections: SMF and UPF InteractionsFastpath and Slowpath Packet CapturesUPF SessMgr FunctionalityMulti PDN Multi-traceMonSub StatisticsX-HeaderConfiguration Procedure for Monitor Subscriber on UPFMonsub CLI OptionsContext, CDRMOD, and Hexdump Interaction for Monitor SubscriberPCAP File Name ConventionPCAP File LocationLimitations