Definitions: missingPkt - While playing out a sequence of packets, a packet(s) was determined to be missing based on a gap in the CEP sequence number. Note: If the imple- mentation supports packet re-ordering, detecting gaps should not take place as packets arrive, only as they are played out - this gives time for mis-ordered packets to arrive late. ooRngDropped - Packet(s) arrives that is outside the range of the jitter buffer. This may be because the jitter buffer is full, or the sequence number addresses a buffer outside the current jitter buffer range, or addresses an already occupied buffer within range. Whether or not packet re-ordering is supported by the implementation, this indication MUST be supported. jtrBfrUnder - The jitter buffer underflowed due to not enough packets arriving as packets were being Danenberg et al Expires April 2003 17 Internet Draft PW CEP MIB October 2002 played out. pktBadLength - Non-bandwidth-saving packet arrives larger or smaller than pwVcCepCfgSonetPayloadLength, or when a fractional SPE packet length does not match the extension header or manual configuration indicating the number of equipped VTs. lops - Loss Of Packet Sync. See draft-ietf-pwe3-sonet. cepRdi - Circuit Emulation over Packet Remote Defect Indication. Generated by the remote CEP de-packetizer when detecting LOPS. Note: not gen- erated by the remote SONET function. See draft-ietf- pwe3-sonet. cepAis - Remote CEP packetizer has detected AIS on its incoming SONET stream. See draft-ietf-pwe3- sonet. Note: cepAis MUST NOT (in itself) cause a CEP down notification. This would be a layer violation. badHdrStack - This indication is set when the number of CEP header extensions detected in incoming packets does not match the expected number. Note: currently there is no hierarchy of CEP defects. Note: the algorithm used to capture these indications is implementation specific.