Terminology page

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Term (plus Abbreviation) Description or expanded abbreviations Appears in
1DM One-way Delay Measurement Message MEF 35
3GPP 3rd Generation Partnership Project MEF 22.1
A See – Availability MEF 22.1
AAA Authentication, Authorization, Accounting BBF TR-178
AAL1 ATM Adaptation Layer 1 MEF 8
Access EPL See – Access Ethernet Private Line MEF 33
Access Ethernet Private Line (Access EPL) Access EPL service uses a Point-to-Point OVC to associate one OVC End Point at a UNI and one OVC End Point at an ENNI. One UNI can support only a single instance of the Access EPL service MEF 33
Access Ethernet Virtual Private Line (Access EVPL) Access EVPL service uses a Point-to-Point OVC to associate one OVC End Point at a UNI and one OVC End Point at an ENNI. One UNI can support one or more Access EVPL instances MEF 33
Access EVPL See – Access Ethernet Virtual Private Line MEF 33
Access Link A link that represents connectivity to External Reference Points of the MEN MEF 2
Access Provider (AP) An Operator MEN that offers the Ethernet Access Service type MEF 33
ACR Adaptive Clock Recovery MEF 22.1
ADM Add Drop Multiplexer MEF 2
ADSL Asymmetric Digital Subscriber Line BBF TR-178
AF Adaptation Function MEF 12.1
aGW Access Gateway in Wimax or LTE networks. Also referred to as Access Service Network (ASN) Gateway in Wimax and S-GW/MME in LTE. In this IA aGW is one of the options for a RAN NC MEF 22.1
AIS Alarm Indication Signal MEF 3, 8, 20, 25, 30, 31, 38, 39
Alarm Status Indicates the occurrence of an abnormal condition. Values for alarm status include: critical, major, minor, indeterminate, warning, pending, and cleared MEF 15
All to One Bundling A UNI attribute in which all CE-VLAN IDs are associated with a single EVC MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29
ALNP Aggregated Line and Node Protection MEF 2
AN Access Node BBF TR-178
ANSI American National Standards Institute MEF 3, 8
AP See – Access Provider MEF 33
APCP Application Protection Constraint Policy MEF 2
API Application Programming Interface MEF 38, 39
APP Application Services Layer MEF 4, 12.1, 17
APS Automatic Protection Switching MEF 2, 3
ARP Address Resolution Protocol BBF TR-178
ASP Application Service Provider MEF 22.1
ATM Asynchronous Transfer Mode MEF 4, 8
ATS Abstract Test Suite MEF 22.1
AUC ALA User Connection BBF TR-178
Availability (A) Availability MEF 35
Availability flr The Availability flr (in contrast with FLR) is the ratio of lost frames over a small interval of time ∆t (e.g. 1 sec). MEF 35
Availability Indicator A binary indication of whether an interval ∆t is available or not. MEF 35
Availability Performance A measure of the percentage of time that a service is useable MEF 6.1, 10.2, 36
Availability Window A period of n consecutive intervals of ∆t, used to determine whether the Availability state has been entered or exited MEF 35
AVP Attribute Value Pair BBF TR-178
Backward OAM information sent from the Responder MEP to the Controller MEP. For LM it indicates the frame counts/loss from the Responder MEP to the Controller MEP. For DM is indicates the delay and delay variation from the Responder MEP to the Controller MEP MEF 35, 36
BAN BNG-embedded Access Node BBF TR-178
Bandwidth Profile (BWP) A characterization of Service Frame arrival times and lengths at a reference point and a specification of the disposition of each Service Frame MEF 6.1, 7, 9, 11, 14, 15, 19, 27, 29, 33
Bandwidth profile per CoS ID A Bandwidth Profile per-Class of Service Identifier MEF 6.1, 23.1, 33
Bandwidth profile per EVC A Bandwidth Profile applied on a per-EVC basis MEF 6.1, 23.1
Bandwidth Profile per OVC End Point A Bandwidth Profile applied on a per-OVC End Point basis MEF 23.1
Bandwidth profile per OVC Endpoint A Bandwidth Profile applied on a per-OVC End Point basis MEF 33
Bandwidth profile per UNI A Bandwidth Profile applied on a per-EVC basis MEF 6.1, 23.1, 33
Bandwidth Profile per VUNI A Bandwidth Profile applied on a per-VUNI basis MEF 23.1
BBER Background Block Error Ratio MEF 3
BBF Broadband Forum MEF 30
BER Bit Error Rate MEF 2, 3
B-FP Branch Flow Point MEF 12.1
BGP Border Gateway Protocol BBF TR-178
BIR Burst Information Rate; rate in bits per second of service frames transmitted, back-to-back with minimum inter-frame gap. It does not include the inter-frame gap, preamble nor start of frame delimiter. It is called “Burst information rate” because it is equal to the maximum information rate at which bursts can be sent MEF 37
BLSR Bi-directional Line Switched Ring MEF 2, 3
BNG Broadband Network Gateway BBF TR-178
BPDU Bridge Protocol Data Unit MEF 2
BR-FP Branch-Root Flow Point MEF 12.1
BRG Bridged Residential Gateway BBF TR-317
BRG-LAN BRG-Local Area Network Interface BBF TR-317
BRG-LSL BRG-Logical Subscriber Link Interface BBF TR-317
Broadcast Service Frame A Service Frame that has the broadcast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 33
BSC Base Station Controller MEF 22.1
BSS Business Support System MEF 31, 36, 38, 39
BTS Base Transceiver Station MEF 22.1
Bundled OVC A non-Rooted Multipoint OVC that associates an OVC End Point that has more than one S-VLAN ID value that maps to it MEF 26.1
Bundling A UNI attribute in which more than one CE-VLAN ID is associated with an EVC MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29
BW Bandwidth MEF 20, 32
BWP See – Bandwidth Profile MEF 12.1, 23.1, 37
CAS Channel Associated Signaling MEF 3, 8
CBOR Concise Binary Object RFC 7049
CBS See – Committed Burst Size MEF 6.1, 7, 8, 10.2, 11, 13, 14, 15, 19, 22.1, 23.1, 27, 29, 33
CCM Continuity Check Message MEF 20, 25, 30, 31, 36
CCS Common Channel Signaling MEF 3, 8
CDMA Common Channel Signaling MEF 22.1
CE Carrier Ethernet BBF TR-178
CEN Carrier Ethernet Network (used interchangeably with Metro Ethernet Network, MEN). Also referred to as MEN Operator or MEN Service Provider. The entity providing the backhaul service for a Mobile Operator MEF 12.1, 22.1
CES Circuit Emulation Service(s) MEF 2, 3, 7, 8, 15, 22.1
CESoETH Circuit Emulation Services over Ethernet MEF 8
CE-VLAN CoS See – Customer Edge VLAN CoS MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 27, 29
CE-VLAN CoS ID Customer Edge VLAN CoS. Also C-tag PCP MEF 33
CE-VLAN CoS ID Value Preservation (OVC) CE-VLAN CoS ID Value Preservation describes a relationship between the format and certain field values of the frame at one External Interface and of the corresponding frame at another External Interface MEF 33
CE-VLAN CoS Preservation (CE-VLAN CoS Preservation) CE-VLAN CoS Preservation MEF 6.1
CE-VLAN ID See – Customer Edge VLAN ID MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 27, 29, 33, 34
CE-VLAN ID / EVC Map (CE-VLAN ID / EVC Map) CE-VLAN ID / EVC Map MEF 6.1
CE-VLAN ID Preservation An EVC attribute in which the CE-VLAN ID of an egress Service Frame is identical in value to the CE-VLAN ID of the corresponding ingress Service Frame MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 29
CE-VLAN ID Preservation (OVC) CE-VLAN ID Preservation describes a relationship between the format and certain field values of the frame at one External Interface and of the corresponding frame at another External Interface MEF 33
CE-VLAN ID/EVC Map An association of CE-VLAN IDs with EVCs at a UNI MEF 7, 9, 10.2, 11, 14, 15, 19, 27
CE-VLAN Tag See – Customer Edge VLAN Tag MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33
CF See – Coupling Flag MEF 6.1, 8, 10.2, 14, 15, 19, 22.1, 23.1, 29, 33
CFM Connectivity Fault Management MEF 20, 30, 31, 36, 38, 39
CH Compute Host ETSI NFV
CHD Compute Host Descriptor ETSI NFV
Child Document A MEF Specification that uses the Ethernet Service Constructs model (defined in this specification) to specify a particular type of EI or ESN MEF 29
CHLI See – Consecutive High Loss Interval MEF 10.21, 22.1, 26.1, 35, 36
CI Characteristic Information MEF 4, 12.1
CIR See – Committed Information Rate MEF 2, 6.1, 7, 8, 10.2, 11, 13, 14, 15, 19, 22.1, 23.1, 27, 29, 33
CIR-compliant Service frames that are compliant with the CIR of the bandwidth profile. CIR-compliant service frames are colored green MEF 7, 15
Circuit Emulation Service A service that transports TDM-based traffic over a Metro Ethernet Network MEF 7, 15
Class of Service (“CoS”) Label A Class of Service Name. Each CoS Label identifies four Performance Tiers where each Performance Tier contains a set of performance objectives and associated parameters MEF 34
Class of Service (CoS) A set of Service Frames that have a commitment from the Service Provider to receive a particular level of performance MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 27, 29, 30
Class of Service Frame Set (CoS FS) A set of Service or ENNI Frames that have a commitment from the Operator or Service Provider subject to a particular set of performance objectives MEF 23.1, 33, 33
Class of Service Identifier (CoS ID) The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given EI MEF 6.1, 9, 10.2, 14, 19, 29
Class of Service Identifier CoSID Information derivable from a) the EVC to which the Service Frame is mapped or b) the combination of the EVC to which the Service Frame is mapped and a set of one or more CE-VLAN CoS values MEF 27
Class of Service Identifier for EFO The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point MEF 23.1
Class of Service Identifier for EFV The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to a VUNI End Point MEF 23.1
Class of Service Identifier for ENNI Frames (ENNI) The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point MEF 33
Class of Service Identifier for Service Frames The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI MEF 23.1
Class of Service Identifier for Service Frames (UNI) The mechanism and/or values of the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI MEF 33
Class of Service Label A CoS Name. Each Class of Service Label identifies four Performance Tiers where each Performance Tier contains a set of performance objectives and associated parameters MEF 23.1, 33
Class of Service Name A designation given to one or more sets of performance objectives and associated parameters by the Service Provider or Operator MEF 23.1, 33
Class of Service Performance Objective An objective for a given performance metric MEF 23.1
CLE Customer Located Equipment MEF 17
CLI Command Line Interface MEF 15
CM See – Color Mode MEF 6.1, 10.2, 14, 15, 19, 22.1, 23.1, 29, 33
CMS Cloud Management System ETSI NFV
CO Central Office BBF TR-178
Color Forwarding An OVC attribute defining the relationship between the Color of an egress ENNI Frame and the Color of the corresponding ingress ENNI Frame or Service Frame MEF 26.1, 34, 37
Color ID The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given external interface MEF 22.1, 23.1
Color Identifier for EFO The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to an OVC End Point MEF 23.1
Color Identifier for EFV The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to a VUNI End Point MEF 23.1
Color Identifier for ENNI Frames (ENNI) The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given ENNI that maps to an OVC End Point. A particular Color ID value may indicate Color instance of Green or Yellow for an ENNI Frame. PCP may indicate both Class of Service Name and Color. Information derivable from a) a set of one or more S-Tag PCP values or b) DEI value MEF 33
Color Identifier for Service Frame The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given UNI MEF 23.1
Color Identifier for Service Frame (UNI) The mechanism and/or values of the parameters in the mechanism used to identify the Color that applies to the frame at a given UNI. A particular Color ID value may indicate Color instance of Green or Yellow for a Service Frame. PCP and DSCP may indicate both Class of Service Name and Color. Information derivable from a) a set of one or more C-Tag PCP values or b) a set of one or more DSCP values MEF 33
Color Mode (CM) CM is a Bandwidth Profile parameter. The Color Mode parameter indicates whether the color-aware or color-blind property is employed by the Bandwidth Profile. It takes a value of “color-blind” or “color-aware” only MEF 6.1, 10.2, 14, 19, 23.1, 27, 29, 33
Color-aware A Bandwidth Profile property where a pre-determined level of Bandwidth Profile compliance for each Service Frame is taken into account when determining the level of compliance for each Service Frame MEF 6.1, 7, 10.2, 14, 15, 19, 22.1, 23.1, 29, 33
Color-blind A Bandwidth Profile property where a pre-determined level of Bandwidth Profile compliance for each frame, if present, is ignored when determining the level of compliance by the CEN MEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 29, 33
Committed Burst Size (CBS) CBS is a Bandwidth Profile parameter. It limits the maximum number of bytes available for a burst of frames sent at the EI speed to remain CIR-conformant MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33
Committed Information Rate (CIR) CIR is a Bandwidth Profile parameter. It defines the average rate in bits/s of frames at an EI up to which the network delivers those frames, and is committed to meeting the performance objectives defined by the CoS Service Attribute MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33
Connected Sub-Network (CSN) A Sub-Network that is connected by physical External Interfaces to the Ethernet Sub-Network under examination (see Figure 4) MEF 29
Consecutive High Loss Interval (CHLI) A sequence of small time intervals contained in T, each with a high frame loss ratio MEF 10.21, 26.1
Controller MEP The Controller MEP initiates SOAM PM PDUs, and in a single-ended session receives responses from the Responder MEP MEF 35, 36
CoS See – Class of Service MEF 6.1, 7, 8, 10.2, 12.1, 15, 17, 20, 23.1, 25, 30, 31, 32, 33, 35, 36, 38, 39
CoS Frame Set Class of Service Frame Set: A set of frames that have a commitment from the Operator or Service Provider subject to a particular set of performance objectives MEF 22.1, 34, 35
CoS FS See – Class of Service Frame Set MEF 23.1, 35
CoS ID See – Class of Service Identifier MEF 12.1, 20, 22.1, 23.1, 35
CoS ID for SOAM PM frames Class of Service Identifier for SOAM PM frames. The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name (H, M, L) that applies to a given SOAM frame MEF 35
CoS Identifier for EFO The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given ENNI that maps to an OVC End Point MEF 34
CoS Identifier for Service Frames The mechanism and/or values of the parameters in the mechanism to be used to identify the Class of Service Name that applies to the frame at a given UNI MEF 34
CoS Label A Class of Service Name. Each CoS Label identifies four Performance Tiers where each Performance Tier contains a set of performance objectives and associated parameters MEF 22.1
CoS Name Class of Service Name: A designation given to one or more sets of performance objectives and associated parameters by the Service Provider or Operator MEF 22.1, 34, 35
COSE CBOR Object Signing and Encryption draft-ietf-cose-msg
Coupling Flag (CF) The choice between two modes of operation of the bandwidth profile algorithm. It takes a value of 0 or 1 only MEF 6.1, 10.2, 14, 15, 19, 23.1, 29, 33
CoV Coefficient of Variation MEF 35
CPE Customer Premise Equipment MEF 17
CPE-WAN interface CPE-WAN interface BBF TR-317
CPO CoS Performance Objective MEF 22.1, 23.1, 34
CR Clock Recovery MEF 3
C-RAN Cloud Radio Access Network ETSI NFV
CRC Cyclic Redundancy Check MEF 2, 3, 8
CSC  “Closed” Service Chain SD-326
CSG Cell Site Gateway BBF TR-178
CSN See – Connected Sub-Network MEF 29
CSP Cloud Service Provider ETSI NFV
CSPF Constriant-based Shortest Path First MEF 2
C-Tag Subscriber VLAN Tag MEF 23.1, 26.1, 31, 34, 37
C-Tag frames IEEE 802.1ad Ethernet frames with one tag: C-Tag. The values of the C-VLAN IDs are in the range between 1 and 4094 MEF 37
CUET Customer Unit Edge Terminal MEF 3
Current Problem List Identifies the current existing problems (probable cause), with severity for an entity MEF 15
Customer The organization purchasing and/or using Ethernet Services. Alternate term: Subscriber MEF 7, 15
Customer Edge Equipment on the Subscriber side of the UNI MEF 6.1, 7, 7, 9, 10.2, 11, 14, 15, 15, 19, 23.1, 27, 29, 33
Customer Edge VLAN CoS (CE-VLAN CoS) The Priority Code Point bits in the IEEE 802.1Q Customer VLAN Tag in a Service Frame that is either tagged or priority tagged MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 27, 29, 33
Customer Edge VLAN ID (CE-VLAN ID) The identifier derivable from the content of a Service Frame that allows the Service Frame to be associated with an EVC at the UNI MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 27, 29, 33
CVLAN Customer VLAN ETSI NFV
C-VLAN Customer VLAN MEF 12.1
DA Destination Address MEF 20
Data Service Frame A Service Frame that is Unicast, Multicast, or Broadcast MEF 10.2
DCE Data Circuit-terminating Equipment MEF 2
DEI Drop Eligible Indicator MEF 12.1, 23.1, 31, 35
DI Data Instance MEF 16, 24
DM Delay Measurement MEF 35, 36
DMM Delay Measurement Message MEF 35
DMR Delay Measurement Response MEF 35
DNU Do not use MEF 22.1
Double-tagged frames IEEE 802.1ad Ethernet frames with two tags. The outer tag is an S-Tag, the inner tag is a C-Tag MEF 37
Down MEP A MEP residing in a Bridge that receives SOAM PDUs from, and transmits them towards, the direction of the LAN. See also Up MEP MEF 20, 25, 30
DP Distribution Point BBF TR-301
DPU Distribution Point Unit BBF TR-301
DSCP Differentiated Services Code Point MEF 22.1, 23.1, 26.1, 29, 37
DSL Digital Subscriber Line MEF 2
DSTM Derived System Timing Mode. The IWF system clock is derived from the incoming Ethernet frames MEF 3
DTE Data Terminal Equipment MEF 21
DTM Derived Timing Mode. The recovered service clock is derived from the incoming Ethernet frames MEF 3
Dual Rate Bandwidth Profile A bandwidth profile that specifies both a CIR/CBS and EIR/EBS MEF 7, 15
Dual-Ended A type of process where a MEP sends measurement information to a peer MEP that will perform the calculations MEF 35, 36
Duplicate Link Aggregation Group MEF 2
DUT Device Under Test MEF 18
E-Access Service Type Ethernet services that use an OVC with at least one UNI OVC End Point and one ENNI OVC End Point MEF 33
EAF ETH Adaptation Function MEF 12.1
EBS See – Excess Burst Size MEF 6.1, 7, 8, 10.2, 11, 13, 14, 15, 19, 22.1, 23.1, 27, 29, 33
E-BWP Egress Bandwidth Profile. A service attribute that specifies the length and arrival time characteristics of egress Service Frames at the egress UNI MEF 22.1
EC ETH Connection MEF 12.1, 22.1
ECDX Emulated Circuit De/Multiplexing Function MEF 3, 8
ECF ETH Connection Function MEF 2, 12.1
ECID Emulated Circuit Identifier MEF 3, 8
ECS EC Segment MEF 12.1
ECT Ethernet Connectionless Trail/Ethernet Connection-oriented Trail MEF 12.1
EEAF Ethernet ECS Adaptation Function MEF 35
EEC Ethernet Equipment Clock MEF 22.1
EEIF Eth EC Interconnect Function MEF 35
EEPP End-to-End Path Protection MEF 2
EETF ETH EVC Termination Function MEF 12.1
EFCF ETH Flow Conditioning Function MEF 12.1
EFD ETH Flow Domain MEF 12.1
EFM Ethernet First Mile MEF 2
EFO ENNI Frame that maps to OVC End Point MEF 23.1, 34
EFP Ethernet Flow Point BBF TR-178
EFT Eth Flow Termination MEF 3
EFTF ETH Flow Termination Function MEF 8, 12.1
EFV ENNI Frame that maps to a VUNI End Point MEF 23.1
Egress Bandwidth Profile A service attribute that specifies the length and arrival time characteristics of egress Frames at the egress EI MEF 6.1, 10.2, 23.1, 29, 33
Egress EI Frame An Ethernet Frame transmitted across the EI from the ESN toward the CSN MEF 29
Egress Frame A Service Frame sent from the Service Provider network to the CE MEF 7, 11
Egress Service Frame A Service Frame sent from the Service Provider network to the CE MEF 6.1, 9, 10.2, 14, 15, 19, 27, 29, 33
EI See – External Interface MEF 12.1, 22.1, 23.1, 29, 32, 33, 35
EI Frame An Ethernet frame transmitted across the EI toward the ESN or an Ethernet frame transmitted across the EI toward the CSN MEF 29
EIR See – Excess Information Rate MEF 2, 6.1, 7, 8, 10.2, 11, 13, 14, 15, 19, 22.1, 23.1, 27, 29, 33
EIR-compliant Service frames that are compliant with the EIR of the bandwidth profile. EIR-compliant service frames may be colored green or yellow depending upon whether they are CIR-compliant or not, respectively MEF 7, 15
E-LAN An Ethernet service type that is based on a Multipoint-to-Multipoint EVC MEF 2, 6.1, 9, 10.2, 14, 19, 20, 23.1, 27, 30, 33, 35
E-Line An Ethernet service type that is based on a Point-to-Point EVC MEF 2, 3, 6.1, 8, 9, 10.2, 14, 19, 20, 23.1, 27, 30, 33
E-LMI Ethernet Local Management Interface MEF 15, 17, 20, 24, 30
EMS Element Management System MEF 17, 25, 30, 31, 35, 36, 38, 39
eNB Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B is the Radio Base Station in LTE. Also referred to as eNodeB or eNB. In this IA an eNodeB is one of the options for a RAN BS MEF 22.1
End Point Map A mapping of specified S-Tag VLAN ID values to specified OVC End Point Identifiers MEF 26.1, 37
End Point Map Bundling When multiple S-VLAN ID values map to a single OVC End Point in the End Point Map, and the OVC associating that OVC End Point is not a Rooted-Multipoint OVC MEF 26.1
End Point Type A parameter in the End Point Map (In this specification the End Point Type is always OVC End Point.) MEF 26.1, 37
ENNI External Network Network Interface MEF 12.1, 12.1, 15, 15, 17, 23.1, 26.1, 30, 31, 32, 33, 34, 35, 37, 38, 39
E-NNI External Network Network Interface BBF TR-178
ENNI Frame The first bit of the Destination Address to the last bit of the Frame Check Sequence of the Ethernet Frame transmitted across the ENNI MEF 23.1, 26.1, 33, 34, 37
ENNI MEG External Network-to-Network Interface Maintenance Entity Group MEF 30
ENNI MTU MTU of an ENNI frame at the ENNI MEF 26.1, 33, 37
ENNI-Ni The functional element administered by the Operator of the ith Operator MEN that supports the protocols and procedures required in MEF 26.1 MEF 12.1, 26.1, 30, 37
ENS See – Ethernet Network Section MEF 23.1
EoS Ethernet over SONET MEF 2
EoSONET Ethernet over SONET MEF 17
EPCF ETH Provider Conditioning Function MEF 12.1, 35
EPL Ethernet Private Line Service MEF 6.1, 8, 22.1, 23.1, 32, 33
EP-LAN Ethernet Private LAN Service MEF 22.1, 32
EP-Tree Ethernet Private Tree Service MEF 22.1, 32
ES Errored Second MEF 3, 8
ESC See – Ethernet Service Construct MEF 29
ESCF ETH Subscriber Conditioning Function MEF 12.1, 17, 35
ESD Ethernet Services Definition MEF 4
ESF Extended Super Frame MEF 3, 8
ESM Ethernet Services Model MEF 4
ESMC Ethernet Synchronization Message Channel MEF 22.1
ESMC Frame A Frame exchanged between a MEN and the RAN CE when UNI PHY is in synchronous operation mode MEF 22.1
ESN See – Ethernet Sub-Network MEF 29
ESNC See – Ethernet Sub-Network Connection MEF 29
ESNC End Point A logical reference point located at a physical External Interface (EI) MEF 29
ESR Errored Second Ratio MEF 3, 8
ESRG ETH-layer SRG MEF 22.1
ETF ETH Termination Function MEF 12.1
ETH Ethernet Services Layer MEF 2, 4, 12.1, 17
ETH FPP An Ethernet Flow Point Pool that represents an Ethernet UNI or E-NNI MEF 15
ETH-AIS Ethernet Alarm Indication Signal function MEF 25, 30, 31, 38, 39
ETH-CC Ethernet Continuity Check function MEF 30, 31, 38, 39
ETH-DM Ethernet Delay Measurement function MEF 35, 36
Ethernet Access Provider Operator of the MEN providing the OVC-based Ethernet service between a UNI and an ENNI MEF 33
Ethernet Frame A data packet on a wire from preamble to FCS MEF 35
Ethernet LAN Service Type An Ethernet Service Type distinguished by its use of a Multipoint-to-Multipoint EVC MEF 9, 10.2, 14, 19
Ethernet Line Service Type An Ethernet Service Type distinguished by its use of a Point-to-Point EVC MEF 9, 10.2, 14, 19
Ethernet Network Section (ENS) A set of one or more MENs, each under a single or collaborative jurisdictional responsibility, for the purpose of managing CPOs MEF 23.1
Ethernet Service Construct (ESC) An abstract entity used to facilitate describing the externally visible behavior of an Ethernet Sub-Network (ESN) as seen by looking into the physical demarcation points of this ESN. The four basic types of Ethernet Service Constructs introduced in this document are EIs, ESNCs, ESNC End Points, and TEs. Each of these entities represents a collection of defined attributes that are used to describe this behavior MEF 29
Ethernet Sub-Network (ESN) The Sub-Network that is under examination by the Ethernet Service Constructs model (see Figure 4) MEF 29
Ethernet Sub-Network Connection (ESNC) An association of two or more ESNC End Points that limits the exchange of EI frames to EIs in the ESNC MEF 29
Ethernet Virtual Connection (EVC) An association of two or more UNIs that limits the exchange of Service Frames to UNIs in the Ethernet Virtual Connection MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 33
EtherType Ethernet Length/Type MEF 12.1
ETH-LB Ethernet Loopback function MEF 30, 31, 38, 39
ETH-LCK Ethernet Lock signal function MEF 31, 38, 39
ETH-LM Ethernet Loss Measurement function MEF 35, 36
ETH-LT Ethernet Linktrace function MEF 30, 31, 38, 39
ETH-RDI Ethernet Remote Defect Indication function MEF 31, 38, 39
ETH-SLM Ethernet Synthetic Loss Measurement Function MEF 35, 36
ETH-Test Ethernet Test function MEF 31, 38, 39
ETH-trail An ETH-trail is an “ETH-layer entity” responsible for the transfer of information from the input of a trail termination source to the output of a trail termination sink MEF 2
E-Tree An Ethernet service type that is based on a Rooted-Multipoint EVC MEF 6.1, 23.1, 27, 30, 33
ETY Ethernet Physical Layer MEF 7, 15
EVC Ethernet Virtual Connection BBF TR-178
EVC ID The Identifier for an EVC MEF 20
EVC Maximum Transmission Unit Size The maximum sized Service Frame allowed for an EVC MEF 10.2
EVC MEG Ethernet Virtual Connection Maintenance Entity Group MEF 30
EVC MTU Size The maximum sized Service Frame allowed for an EVC MEF 6.1, 33
EVC-MA Ethernet Virtual Connection Maintenance Association MEF 25
EVPL Ethernet Virtual Private Line Service MEF 6.1, 8, 22.1, 23.1, 32, 33
EVP-LAN Ethernet Virtual Private LAN Service MEF 22.1, 23.1, 32
EVP-Tree Ethernet Virtual Private Tree Service MEF 22.1, 32
E-WAN An MEF defined ETH services aware network that provides connectivity between two or more MENs via ENNIs MEF 26.1
Excess Burst Size (EBS) EBS is a Bandwidth Profile parameter. It limits the maximum number of bytes available for a burst of Service or ENNI Frames sent at the EI speed to remain EIR-conformant MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 29, 33
Excess Information Rate (EIR) EIR is a Bandwidth Profile parameter. It defines the average rate in bits/s of Service or ENNI Frames up to which the network may deliver Service or Network Frames but without any performance objectives MEF 6.1, 7, 10.2, 11, 14, 15, 19, 23.1, 29, 33
External Interface (EI) External Interface. These can be one of those defined in MEF 4, 12.1 MEF 23.1, 26.1, 29, 33, 34, 37
FCS Frame Check Sequence MEF 8, 12.1, 35
FD See – Frame Delay MEF 6.1, 10.2, 14, 15, 19, 22.1, 23.1, 30, 32, 33, 34, 35, 36
FDL Facility Data Link MEF 3, 8
FDR See – Frame Delay Range MEF 22.1, 23.1, 33, 34, 35, 36
FDV See – Frame Delay Variation MEF 6.1, 14, 17, 19, 22.1, 30, 32
FDX Full Duplex MEF 6.1, 7, 15
FE Functional Element MEF 4
FER Frame Error Ratio MEF 3, 8
FLR See – Frame Loss Ratio MEF 6.1, 10.2, 14, 17, 19, 22.1, 23.1, 30, 32, 33, 34, 35, 36
FM Fault Management MEF 22.1, 25, 30, 31, 36, 38, 39
Forward OAM information sent from the Controller MEP to the Responder MEP. For LM it indicates the frame counts/loss from the Controller MEP to the Responder MEP. For DM is indicates the delay and delay variation from the Controller MEP to the Responder MEP MEF 35, 36
FP/FPP Flow Point/Flow Point Pool MEF 12.1
Frame Short for Ethernet Frame MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33
Frame Delay (FD) The time required to transmit a frame from ingress EI to egress EI MEF 6.1, 10.2, 11, 14, 15, 19, 23.1, 33
Frame Delay Performance A characterization of the delays experienced by different frames belonging to the same CoS Frame Set MEF 6.1, 10.2, 14, 15, 19, 23.1, 33
Frame Delay Range (FDR) The difference between the observed percentile of delay at a target percentile and the observed minimum delay for the set of frames in time interval T MEF 10.2, 23.1, 33
Frame Delay Range Performance A measure of the extent of delay variability experienced by different frames belonging to the same CoS Frame Set MEF 10.2, 23.1, 33
Frame Delay Variation (FDV) The difference in delay of two frames of the same CoS Frame Set MEF 6.1, 14, 15, 19
Frame Delay Variation Performance A characterization, based on Inter-Frame Delay Variation, of the variation in the delays experienced by different frames belonging to the same CoS Frame Set MEF 6.1, 14, 15, 19
Frame Loss A performance attribute of an EVC MEF 11
Frame Loss Ratio (FLR) Frame Loss Ratio is a characterization of the number of lost Frames between the ingress External Interface (EI) and the egress External Interface (EI). Frame Loss Ratio is expressed as a percentage MEF 6.1, 10.2, 14, 15, 19, 23.1, 33
G-ACh Generic Associated Channel BBF TR-178
GAL G-ACh Label BBF TR-178
GARP Generic Attribute Registration Protocol MEF 2, 20
GbE Gigabit Ethernet MEF 4
GIWF Generic Inter-working Function MEF 22.1
GPON Gigabit Passive Optical Networks IGMP BBF TR-178
GRE Generic Routing Encapsulation MEF 2
GSM Global System for Mobile communication MEF 22.1
HDX Half Duplex MEF 7, 15
H-FP Hairpin Flow Point MEF 12.1
High Loss Interval (HLI) A small time interval contained in T with a high frame loss ratio MEF 10.21, 26.1
HLI See – High Loss Interval MEF 10.21, 22.1, 26.1, 35, 36
H-NID Hybrid NID MEF 12.1
HNS Hybrid NID Service MEF 12.1
HOVC Higher Order Virtual Container MEF 3
IA Implementation Agreement MEF 3, 8, 20, 22.1, 23.1, 30, 35
I-BWP Ingress Bandwidth Profile. A characterization of ingress Service Frame arrival times and lengths at the ingress UNI and a specification of disposition of each Service Frame based on its level of compliance with the characterization MEF 22.1
IE Information Element MEF 15
IEEE Institute of Electrical and Electronics Engineers MEF 4, 8, 30, 31, 35, 36, 38, 39
IETF Internet Engineering Task Force MEF 2, 3, 8, 16, 30, 31, 36, 38, 39
IFDV See – Inter-Frame Delay Variation MEF 10.2, 22.1, 23.1, 33, 34, 35, 36
IGP Interior Gateway Protocol MEF 2
II Internal Interface MEF 12.1
Ingress The direction from the CE into the Service Provider network MEF 13
Ingress Bandwidth Profile A characterization of frame arrival times and lengths at the ingress EI and a specification of disposition of each frame based on its level of compliance with the characterization MEF 6.1, 10.2, 23.1, 29, 33
Ingress Frame A frame transmitted across the EI toward the CEN MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 29, 33
I-NNI Internal Network-Network Interface BBF TR-178
Inter-Frame Delay Variation (IFDV) The difference in delay of two frames of the same CoS Frame Set MEF 10.2, 23.1, 33
Inter-Frame Delay Variation Performance A characterization, based on Inter-Frame Delay Variation, of the variation in the delays experienced by different frames belonging to the same CoS Frame Set MEF 10.2, 23.1, 33
IP Internet Protocol BBF TR-178
IPSec Internet Protocol Security MEF 22.1
ITU International Telecommunication Union MEF 2, 4, 16
ITU-T ITU Telecommunication Standardization Sector MEF 3, 8, 30, 31, 35, 36, 38, 39
IVC Infrastructure Virtual Circuit BBF TR-178
IWF Interworking Function MEF 3, 4, 8
L1 Layer One MEF 4
L2 Layer Two MEF 4
L2+ Layer(s) above L2 MEF 4
L2CP Layer 2 Control Protocol MEF 12.1, 20, 22.1, 23.1, 29
L2CP Frame See – Layer 2 Control Protocol Service Frame MEF 33
L2CP Tunneling The process by which a frame containing a Layer 2 Control Protocol is transferred between External Interfaces MEF 26.1
L2DP Layer Two Data Plane MEF 12.1
L2F Layer 2 Forwarding BBF TR-178
L2TP L2 Tunneling Protocol BBF TR-178
LACP Link Aggregation Control Protocol MEF 2, 20
LAG Link Aggregation Group MEF 2, 20, 29
LAN Local Area Network MEF 2, 4, 12.1, 30, 31, 35, 36, 38, 39
LANE ATM LAN Emulation MEF 17
Layer 2 Control Protocol Service Frame (L2CP Frame) A frame that is used for Layer 2 control, e.g., Spanning Tree Protocol MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33
Layer 2 Control Protocol Tunneling The process by which a frame carrying a Layer 2 Control Protocol Service data unit is passed through the Service Provider or Operator network without being processed and is delivered to the proper EI(s) MEF 6.1, 7, 9, 10.2, 11, 14, 15, 19, 23.1, 29, 33
LB Loop Back MEF 20
LBM Loopback Message MEF 20, 25, 30, 31, 38, 39
LBR Loopback Reply MEF 20, 25, 30, 31, 38, 39
LCK Locked, used in reference to LCK PDUs MEF 31, 38, 39
LDP Label Distribution Protocol BBF TR-178
Leaf OVC End Point An OVC End Point that has the role of Leaf MEF 26.1
Link An ETH link or TRAN link MEF 2
Link OAM OAM specific to a single link as per clause 57 of [IEEE 802.3] MEF 20
Link Protection Mechanism (LPM) Any mechanism (e.g. LAG) used to protect traffic in the event of link failure across an EI with multiple links MEF 29
LLC Logical Link Control MEF 12.1
LM Loss Measurement MEF 35, 36
LMM Loss Measurement Message MEF 35
LMR Loss Measurement Reply MEF 35
LOF Loss of Frame MEF 2
LOFA Loss of Frame Alignment MEF 8
LOFS Loss of Frames State MEF 8
LOH Line OverHead MEF 3
LOPS Loss Of Packet Synchronization MEF 3
LOS Loss of Signal MEF 2, 3, 8
LOVC Lower Order Virtual Container MEF 3
LPM See – Link Protection Mechanism MEF 29
LSL Logical Subscriber Link BBF TR-317
LSP Label Switched Path MEF 2
LSR Label Switched Router MEF 2
LTE Long Term Evolution MEF 22.1
LTE. Line Termination Equipment MEF 3
LTM Linktrace Message MEF 30, 31, 38, 39
LTR Linktrace Reply MEF 30, 31, 38, 39
MA Maintenance Association (equivalent to a MEG) MEF 25, 30, 31, 35, 36, 38, 39
MAC Media Access Control MEF 2, 4, 8, 12.1, 16, 17, 24, 25, 30, 31, 35, 36, 38, 39
MAID Maintenance Association Identifier (equivalent to a MEG ID) MEF 25, 30, 31, 35, 38, 39
Maintenance Interval A Maintenance Interval is a time interval agreed to by the Service Provider and Subscriber during which the service may not perform well or at all MEF 35
MAN MPLS enabled Access Node BBF TR-178
MANO (NFV) Management and Organization ETSI NFV
MAP Multi-Access Point
Mapper A device or logic that implements a mapping function MEF 3
Mapping The process of associating each bit transmitted by the service into the SDH/SONET payload structure that carries the service. For example, mapping a DS1 service into SONET VT-1.5 / SDH VC-11 associate each bit of the DS1 with a location in the VT-1.5/VC-11 MEF 3
Maximum Number of CE-VLAN IDs per OVC An integer that indicates the quantity of CE-VLANs that can be mapped to a single OVC at that UNI. A value = 1 indicates that UNI can only map single CE-VLANs to an OVC. A value > 1 indicates that up to that limit can be mapped to a single OVC MEF 33
Maximum Number of EVCs The maximum number of EVCs that may be on a UNI MEF 6.1
Maximum Number of OVCs per UNI The maximum number of OVCs that may be on a UNI MEF 33
Maximum number of UNIs (MNU) The maximum number of UNIs that may be in an EVC MEF 6.1, 10.2
Maximum Transmission Unit (MTU) The maximum sized Service Frame allowed for an Ethernet service MEF 33
MBSFN Multimedia Broadcast Multicast Service (MBMS) Single Frequency Network support MEF 22.1
MCF MAC Convergence Function MEF 12.1
MD Maintenance Domain MEF 20, 25, 30, 31, 35, 36, 38, 39
MD Level Maintenance Domain Level (equivalent to a MEG level) MEF 25, 31, 35, 36, 38, 39
ME Maintenance Entity BBF TR-178
Mean Frame Delay Performance The arithmetic mean, or average of delays experienced by frames belonging to the same CoS Frame Set MEF 10.2, 23.1, 33
Mean time to restore The mean time from when a service is unavailable to the time it becomes available again MEF 2
Measurement Bin A Measurement Bin is a counter that stores the number of delay measurements falling within a specified range, during a Measurement Interval MEF 35, 36
Measurement Interval A period of time during which measurements are taken. Measurements initiated during one Measurement Interval are kept separate from measurements taken during other Measurement Intervals. It is important to note that this is different from T MEF 35, 36
Measurement Interval Data Set The collection of completed measurements that were initiated during a Measurement Interval MEF 35
MEF Metro Ethernet Forum MEF 2, 4, 16, 30, 31, 35, 36, 38, 39
MEG Maintenance Entity Group BBF TR-178
MEG ID Maintenance Entity Group Identifier. Equivalent to Maintenance Association Identifier (MAID) MEF 30, 31, 38, 39
MEG Level Maintenance Entity Group Level (equivalent to MD Level) MEF 20, 30, 31, 35, 36, 38, 39
MEL Maintenance Entity Level MEF 12.1
MEN Metro Ethernet Network. Synonymous with CEN (Carrier Ethernet Network) MEF 2, 3, 4, 6.1, 7, 8, 9, 12.1, 15, 16, 17, 23.1, 26.1, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39
MEN-bound IWF The IWF receiving TDM data from the customer’s TDM-based equipment, and forwarding this data in the form of Ethernet frames into the MEN MEF 8
ME-NE See – Metro Ethernet Network Element MEF 15
MEP Maintenance Association End Point (IEEE) or MEG End Point (ITU) MEF 17, 20, 22.1, 25, 30, 31, 35, 36, 38, 39
MEP ID Maintenance Entity End Point Identification MEF 20
Metro Ethernet Network The Operator’s or Service Provider’s network providing Ethernet services. Synonymous with Carrier Ethernet Network (CEN) MEF 6.1, 7, 15, 23.1, 33
Metro Ethernet Network Element (ME-NE) The Operator’s or Service Provider’s network providing Ethernet services. Synonymous with Carrier Ethernet Network (CEN) MEF 15
MFD Mean Frame Delay MEF 22.1, 23.1, 33, 34, 35, 36
MGT EC Management EC MEF 12.1
MHF MIP Half Function MEF 30, 38
MIB Management Information Base MEF 3, 8, 31, 36, 38, 39
Minimum Inter-Frame Gap Defined as 96 Bit Times [section 4.4.2 in IEEE Std 802.3-2005] MEF 37
MIP Maintenance domain Intermediate Point(IEEE) or MEG Intermediate Point (ITU) MEF 17, 20, 30, 31, 35, 36, 38, 39
MME Mobility Management Entity is an LTE function and located in the Network Controller site. In this IA MME is included when referring to a RAN NC MEF 22.1
MNU See – Maximum Number of UNIs MEF 6.1, 10.2
Mobile Operator The entity obtaining the Backhaul service from a SP or MEN Operator. Also referred to as Subscriber in this IA MEF 22.1
MP Maintenance Point. One of either a MEP or a MIP MEF 25, 30, 35, 36, 38, 39
MPLS Multi Protocol Label Switching MEF 2, 4, 17
MPtMP Multi-point to multi-point BBF TR-178
MR Marketing Report (BBF Term for published informational and positioning papers)
MRTIE Maximum Relative Time Interval Error MEF 18
MS-BNG Multi Service BNG BBF TR-178
MTP Multipoint MEF 12.1
MTU See – Maximum Transmission Unit MEF 6.1, 20, 22.1, 25, 26.1, 30, 31, 33, 34, 35, 37, 38, 39
MTU size The maximum sized Service Frame allowed for an Ethernet service MEF 6.1
Multicast Service Frame A Service Frame that has a multicast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 33
Multiplex Transmit one or more channels over a single channel MEF 3
Multipoint-to-Multipoint EVC An EVC with two or more UNIs MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33
Multipoint-to-Multipoint OVC An OVC that can associate two or more Root OVC End Points MEF 26.1
N/A Not Applicable MEF 6.1, 23.1, 33
N/S Not Specified MEF 6.1, 7, 15, 22.1, 23.1, 33
NaaS Network as a Service ETSI NFV
NDD Network Demarcation Device MEF 17
NE Network Element MEF 2, 3, 4, 12.1, 17, 20, 22.1, 25, 30, 31, 32, 35, 36, 38, 39
NERG Network Enhanced Residential Gateway BBF TR-317
NETCONF The Network Configuration Protocol MEF 38, 39
NETCONF Client A NETCONF entity that nvokes protocol operations on a NETCONF server. In addition, a client can subscribe to receive notifications from a server MEF 38, 39
NETCONF Server A NETCONF entity that executes protocol operations invoked by a NETCONF client. In addition, a server can send notifications to a client MEF 38, 39
NF Network Function ETSI NFV
NF Forwarding Graph Network Function Forwarding Graph
NF Set Network Function Set ETSI NFV
NFV Network Functions Virtualisation ETSI NFV
NFV Framework Network Function Virtualization Framework ETSI NFV
NFV Orchestrator Network Function Virtualization Orchestrator ETSI NFV
NFVI Network Function Virtualization Infrastructure ETSI NFV
Nf-Vi NFVI – Virtualized Infrastructure Manager ETSI NFV
NFVIaaS Network Functions Virtualization Infrastructure as a Service ETSI NFV
NFVI-Node Network Functions Virtualisation Infrastructure Node ETSI NFV
NFVI-PoP Network Function Virtualisation Infrastructure Point of Presence ETSI NFV
NFV-MANO Network Functions Virtualisation Management and Orchestration ETSI NFV
NFVO Network Functions Virtualisation Orchestrator ETSI NFV
NFV-Res NFV Resource ETSI NFV
NG Smallest compliant value of WG for a given bandwidth profile MEF 37, 37
NGMN Next Generation Mobile Networks NID BBF TR-178
NI- Network Interworking (e.g., NI-NNI) MEF 4
NIC Network Interface Controller NS Network Service ETSI NFV
NID Network Interface Device MEF 12.1
NI-NNI Network Interworking NNI MEF 17
NMI NID-MEN Interface MEF 12.1
NMI-C NMI – Client (Functional Element) MEF 12.1
NMI-N NMI – Network (Functional Element) MEF 12.1
NMS Network Management System MEF 17, 25, 30, 31, 35, 36, 38, 39
NNI Network Network Interface MEF 3, 4, 12.1, 17, 30, 31, 38, 39
Node A Provider owned network element MEF 2, 4, 12.1, 17, 30, 31, 38, 39
NodeB WCDMA Radio Base Station. In this IA a NodeB is one of the options for a RAN BS MEF 22.1
N-PoP Network Point of Presence ETSI NFV
NPVR Network Personal Video Recorder ETSI NFV
NS Network Slice Ericsson
NSP Network Service Provider MEF 22.1
NT Network Termination MEF 4
NTP Network Time Protocol MEF 22.1
NUNI NID UNI MEF 12.1
NY Smallest compliant value of WY for a given bandwidth profile MEF 37
OAM Operations Administration and Maintenance BBF TR-178
OAM Domain The part of a network for which faults in connectivity can be managed and performance can be monitored. (equivalent to a “Maintenance Domain”) MEF 25, 30, 35
OAM Flow Space The portions of an end-to-end flow where SOAM frames are seen as SOAM frames (as opposed to being seen as data frames when double tagged) MEF 30, 30, 35
OAMPDU Operation Administration and maintenance protocol data unit MEF 21
O-EC Operator EC MEF 12.1
OFDMA Orthogonal frequency division multiple access Wi-Fi Alliance
On-Demand OAM actions that are initiated via manual intervention for a limited time to carry out diagnostics. On-Demand OAM can result in singular or periodic OAM actions during the diagnostic time interval MEF 35, 36
One-way A measurement performed in the forward or backward direction. For example from MEP A to MEP B or from MEP B to MEP A MEF 35, 36
Operator The administrative organization responsible for a CEN MEF 23.1, 26.1, 29, 34, 37
Operator MEG Operator Maintenance Entity Group MEF 30
Operator Virtual Connection (OVC) An association of OVC End Points MEF 23.1, 26.1, 33, 34, 37
Operator-MA Operator Maintenance Association MEF 25
OPNFV Open Platform for NFV OPNFV
Ordered Pair of UNIs A directional UNI pair of the form , selected from the UNI list for the EVC of interest MEF 10.2
Or-Vi Orchestrator – Virtualized Infrastructure Manager ETSI NFV
Or-Vnfm Orchestrator – VNF Manager ETSI NFV
Os-Ma OSS/BSS – NFV Management and Orchestration ETSI NFV
OSS Operations Support System MEF 31, 36, 38, 39
OTN Optical Transport Network MEF 4
OVC See – Operator Virtual Connection MEF 23.1, 26.1, 30, 32, 33, 34, 35, 37, 38, 39
OVC End Point (OVC EP) An association of an OVC with a specific External Interface i.e., UNI, ENNI MEF 23.1, 26.1, 33, 34, 37
OVC End Point Map at the UNI An association of CE-VLAN IDs with OVCs at a UNI MEF 33
OVC End Point Role A property of an OVC End Point that determines the forwarding behavior between it and other OVC End Points that are associated with the OVC End Point by an OVC MEF 26.1, 26.1, 30, 32, 33, 34, 35, 37, 38, 39
OVC EP See – OVC End Point MEF 23.1, 34
OVC Identifier string that is unique among all OVCs in the Operator MEN MEF 26.1, 33, 34, 37
OVF Open Virtualization Format ETSI NFV
P2P Point-to-point MEF 12.1, 25, 30, 35
PaaS Platform as a Service ETSI NFV
Path A succession of interconnected links at a specific (ETH or TRANS) layer MEF 2, 34
pBG Physical Business Gateway BBF TR-328
PC Policy Controller BBF TR-178
PCEF Policy and Charging Enforcement Function MEF 22.1, 33, 34, 37
PCP Priority Code Point MEF 22.1, 23.1, 30, 35
pCPE Physical CPE BBF TR-328
pCPE-LSL interface BBF TR-317
Pd Frame Delay Performance percentile MEF 23.1
PDH Plesiochronous Digital Hierarchy. PDH refers to the DS1/DS2/DS3 and E1/E3/E4 family of signals MEF 3, 4, 8, 22.1
PDU Protocol Data Unit MEF 8, 12.1, 20, 25, 30, 31, 35, 36, 38, 39
PE Provider Edge MEF 2, 3, 4, 12.1
PEC Packet based Equipment Clocks MEF 22.1, 4, 8, 22.1
Performance Tier (PT) A MEF CoS Performance Objectives (CPO) set MEF 23.1, 12.1, 20, 25, 30, 31, 35, 36, 38, 39
PHB Per Hop Behavior BBF TR-178
PICS Protocol implementation conformance statement MEF 21, 3, 4, 12.1
PLL Phase Locked Loop MEF 3
PM Performance Monitoring MEF 22.1, 35, 36
PM Function A MEP capability specified for performance monitoring purposes (e.g., Single-Ended Delay, Single-Ended Synthetic Loss) MEF 35, 36
PM Session A PM Session is the application of a given PM Function between a given pair of MEPs and using a given CoS Frame Set over some (possibly indefinite) period of time MEF 35, 36
PM Solution A PM Solution is a set of related requirements that when implemented allow a given set of performance metrics to be measured using a given set of PM functions MEF 35, 36
PM Tool A generic term used to discuss the application of a PM Function MEF 35, 36
PNF Physical Network Function ETSI NFV
Pointer A part of the SDH/SONET overhead that locates a floating payload structure. Frequency differences between SDH/SONET network elements or between the payload and the SDH/SONET equipment can be accommodated by adjusting the pointer value MEF 3, 36
Point-to-Point EVC An EVC with exactly 2 UNIs MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33
Point-to-Point OVC An OVC that associates exactly two Root OVC End Points MEF 26.1, 36
PON Passive Optical Network BBF TR-178
POP Point of Presence BBF TR-178
PPP Point to Point Protocol BBF TR-178
PPVPNS Provider Provisioned Virtual Private Network Service ETSI NFV
Pr A specific percentile of the Frame Delay Performance used in Frame Delay Range , where Pv>0 MEF 23.1
PRBS Pseudo-Random Binary Sequence MEF 18, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 29, 33
PRC Primary Reference Clock MEF 22.1
PRM Protection Reference Model MEF 2
Proactive OAM actions that are carried on continuously to permit timely reporting of fault and/or performance status MEF 35, 36
Protection merge point A point in which the protection path traffic is either merged back onto the working path or passed on to the higher layer protocols (used in [3], called ‘tail-end switch’ in SONET/SDH) MEF 2
PRS Primary Reference Source MEF 3
PSN Packet Switched Network BBF TR-178
PSTN Public Switched Telephone Network MEF 3
PT Polling Timer MEF 24
PtP Point to Point BBF TR-178
Pv Inter-Frame Delay Variation Performance percentile MEF 23.1
PVT Polling Verification Timer MEF 24
PW Pseudo Wire MEF 17
PWE3 Pseudo-Wire Emulation Edge to Edge (an IETF working group) MEF 3, 8
QL Quality Level of clock used in Synchronous Ethernet MEF 22.1
QoS Quality of Service MEF 2
Qualified Set of Service Frames The set of frames that comply with specific criteria, such as the arrival time at the Ingress UNI and Bandwidth Profile compliance, on which a performance attribute is based MEF 10.2
RAN Radio Access Network MEF 22.1
RAN BS RAN Base Station MEF 22.1
RAN CE RAN Customer Edge MEF 22.1
RAN NC RAN Network Controller MEF 22.1
RBS Radio Base Station defined in this IA and referred generally as Base Station in 3GPP TS 21.905 MEF 22.1
RDI Remote Defect Indication MEF 3, 8, 20, 25, 30, 31, 38, 39
Remote UNI (RUNI) Remote UNI is a UNI serving as the UTA component consisting of a collection of service attributes in the UNI within an Operator’s MEN. The remote UNI is paired with a VUNI in a VUNI Provider’s MEN. At the remote UNI, Service Frames are exchanged between the Subscriber and the Network Operator MEN MEF 28
Resiliency Performance The number of High Loss Intervals and Consecutive High Loss Intervals in a time interval T MEF 10.21, 26.1, 36
Responder MEP In a single-ended session, the Responder MEP receives SOAM PM PDUs, from the Controller MEP, and transmits a response to the Controller MEP MEF 35, 36
RFC Request For Comment. (The term for IETF published technical work) MEF 30, 31, 35, 36, 38, 39
RG Residential Gateway BBF TR-178
RI Reference Implementation NIST
RMI Remote Management Interface MEF 12.1
RMP Rooted Multipoint MEF 12.1
RNC Radio Network Controller MEF 22.1
Root OVC End Point An OVC End Point that has the role of Root MEF 26.1
Rooted-Multipoint MEF Point to Multipoint service; see [MEF 10.1] MEF 20
Rooted-Multipoint EVC A multipoint EVC in which each UNI is designated as either a Root or a Leaf. Ingress Service Frames at a Root UNI can be delivered to one or more of any of the other UNIs in the EVC. Ingress Service Frames at a Leaf UNI can only be delivered to one or more Root UNIs in the EVC MEF 6.1, 10.2, 23.1, 33
Rooted-Multipoint OVC An OVC that can associate at least one Leaf or Trunk OVC End Point MEF 26.1
RPC Remote Procedure Call MEF 38, 39
RPR Resilient Packet Ring MEF 2, 4
RSTP Rapid Spanning Tree Protocol MEF 2
RTP Real-time Transport Protocol MEF 8, 22.1
RUNI See – Remote UNI MEF 30
RUNI-N Remote UNI-N (Functional Element) MEF 12.1
S When applied to an EVC it is a non-empty subset of ordered UNI pairs and when applied to an OVC it’s a non-empty subset of ordered OVC End Point pairs MEF 23.1, 35
SaaS Software as a Service ETSI NFV
Scheduled Downtime A time interval agreed upon by both the Subscriber and Service Provider during which a service may be disabled by the Service Provider MEF 10.2
SDH Synchronous Digital Hierarchy MEF 2, 3, 4
SDN Software Defined Networking ONF
SDO Standards Development Organization MEF 32
SDR Software Defined Radio ETSI NFV
S-EC Subscriber EC MEF 12.1
Segment A connected subset of the trail MEF 2
Se-Ma Service, VNF and Infrastructure Description – NFV Management and Orchestration ETSI NFV
SEP Service End Point MEF 32
Service Frame An Ethernet frame transmitted across the UNI toward the Service Provider or an Ethernet frame transmitted across the UNI toward the Subscriber MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 21, 23.1, 26.1, 29, 31, 33, 34, 35, 36, 37, 38, 39
Service Frame Delivery An EVC service attribute defined in [2] MEF 6.1
Service Level Agreement (SLA) The contract between the Subscriber and Service Provider specifying the agreed to service level commitments and related business agreements MEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 33
Service Level Specification (SLS) The technical specification of service level (including performance) MEF 6.1, 7, 10.2, 14, 15, 19, 23.1, 33
Service Multiplexing A UNI service attribute in which the UNI can be in more than one EVC instance MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 29, 33
Service OAM Service OAM is OAM used to monitor an individual Service; see [ITU-T Y.1731] and [IEEE 802.1ag] MEF 20
Service Provider (SP) The organization providing UNI to UNI Ethernet service(s) MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 23.1, 26.1, 29, 33, 34, 37
SES Severely Errored Second MEF 3
SESR Severely Errored Second Ratio MEF 3
SF Super Frame MEF 3, 8
S-GW Serving Gateway is an LTE function and located at the Network Controller site. In this IA S-GW is one of the options for RAN NC MEF 22.1
SI Sample Implementation Wikipedia
SI- Service Interworking (e.g., SI-NNI) MEF 4
Single Rate Service A service that only specifies a CIR/CBS and no EIR/EBS MEF 7
Single-Ended A type of process where a MEP sends a measurement request and the peer MEP replies with the requested information so the originating MEP can calculate the measurement MEF 35, 36
Sink MEP In a dual-ended session, the Sink MEP receives SOAM PM PDUs, from the Controller MEP and performs the performance calculations MEF 35, 36
SI-NNI Service Interworking NNI MEF 17
SLA See – Service Level Agreement MEF 2, 3, 6.1, 7, 10.2, 14, 15, 17, 19, 22.1, 23.1, 33
SLM Synthetic Loss Message MEF 35, 36
SLR Synthetic Loss Reply MEF 35
SLS See – Service Level Specification MEF 2, 3, 6.1, 7, 10.2, 12.1, 14, 15, 17, 19, 22.1, 23.1, 32, 33, 35
SNI Service Node Interface MEF 4, 15, 17, 29
S-NID Service NID MEF 12.1
SNMP Simple Network Management Protocol MEF 31, 36, 38, 39
SNMP Agent An SNMP entity containing one or more command responder and/or notification originator applications (along with their associated SNMP engine). Typically implemented in an NE MEF 36, 38, 39
SNMP Manager An SNMP entity containing one or more command generator and/or notification receiver applications (along with their associated SNMP engine). Typically implemented in an EMS or NMS MEF 31, 36, 38, 39
SOAM Service Operations, Administration, and Maintenance MEF 22.1, 25, 30, 31, 35, 36, 38, 39
SOAM PDU Service OAM Protocol Data Unit. Specifically, those PDUs defined in [IEEE 802.1ag], [ITU-T Y.1731], or MEF specifications MEF 30, 31, 35, 36, 38, 39
SOAM PM CoS ID See CoS ID for SOAM PM frames MEF 35
SOAM PM Implementation Capabilities of an NE that are required to support SOAM Performance Monitoring. Specifically, those PDUs defined in IEEE 802.1Q-2011 [24], ITU-T Y.1731 [1], or MEF specifications. In ITU-T documents the equivalent term OAM PDU is used MEF 35
SOAM PM PDU Service OAM Protocol Data Unit specifically for Performance Measurement. Examples are LMM/LMR, DMM/DMR/1DM, SLM/SLR MEF 35
SON Self Organizing Networks ETSI NFV
SONET Synchronous Optical Network MEF 2, 3, 4
SP See – Service Provider MEF 22.1, 30, 32
SP-EC Ethernet Connection across the SP MEF 12.1, 22.1
SRG Shared Risk Group. Set of NEs that are collectively impacted by a specific fault or fault type MEF 22.1
SRLG Shared Risk Link Group MEF 2
SSM Synchronization Status Message MEF 3, 22.1
SSRC Synchronization Source (a field within the RTP protocol, RFC 3550) MEF 8
S-Tag Service Provider VLAN Tag MEF 23.1, 26.1, 31, 33, 34, 37
S-Tag frames IEEE 802.1ad Ethernet frames with one tag: S-Tag. The values of the S-VLAN IDs are in the range between 1 and 4094 MEF 37
STP Spanning Tree Protocol MEF 2
Structure-agnostic Structure-agnostic emulation is the transport of unstructured TDM, or of structured TDM when the structure is completely disregarded by the transport mechanism MEF 8
Structure-aware Structure-aware emulation is the transport of structured TDM taking at least some level of the structure into account MEF 8
Structure-indicated Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by pointers MEF 8
Structure-locked Encapsulation utilized for Structure-Aware TDM transport where TDM structure boundaries are indicated by packet payload boundaries MEF 8
Subscriber The organization purchasing and/or using Ethernet Services. This may be an end user business organization or a mobile operator MEF 2, 6.1, 7, 9, 10.2, 11, 13, 14, 15, 16, 19, 22.1, 23.1, 26.1, 29, 33, 34, 37
Subscriber-MA Subscriber Maintenance Association MEF 25
Subscriber-MEG Subscriber Level Maintenance Entity Group MEF 20,30
SVLAN Service VLAN ETSI NFV
S-VLAN Service VLAN (also referred to as Provider VLAN) MEF 12.1
S-VLAN ID The 12 bit VLAN ID field in the S-Tag of an ENNI Frame MEF 26.1, 33, 34, 37
Synthetic Frame An Ethernet frame created to emulate service traffic, carry additional information necessary to support calculating delay or loss and that is treated the same way as a Service Frame MEF 35
Synthetic Traffic SOAM traffic that emulates service traffic in order to measure the performance experience. Delay measurements must use synthetic traffic, because user traffic does not contain standardized timestamp fields. Other measurements, such as Frame Loss, may also use synthetic frames for certain advantages (e.g., ability to measure loss in multipoint services) MEF 35, 36, 39
T Time Interval for SLS Metrics. The time over which a Performance Metric is defined. T => Measurement Interval, and generally consists of multiple Measurement Intervals MEF 10.21, 23.1, 35, 36
TAF Transport Adaptation Function MEF 12.1
Tag An optional field in a frame header. In this document it is the 4-byte field that, when present, appears immediately after the Source Address, or another tag in an Ethernet frame header and which consists of the 2-byte Tag Protocol Identification Field (TPID) which indicates S-Tag or C-Tag, and the 2-byte Tag Control Information field (TCI) which contains the 3-bit Priority Code Point, and the 12-bit VLAN ID field MEF 26.1, 33, 37
TALS TDM Access Line Service MEF 3, 8
TAP Tunnel Attachment Process MEF 12.1
TAP-N TAP – Network (Functional Element) MEF 12.1
TC Textual Conventions MEF 31, 36, 38, 39
TCF Transport Connection Function MEF 2
TCP Transmission Control Protocol MEF 2
TDM Time Division Multiplexing (examples include Nx64 kbit/s, T1, E3, OC-3, STM-1, OC-12) MEF 2, 3, 8
TDM-bound The direction of travel of CESoETH frames within the IWF receiving frames containing emulated circuit data from the MEN, and forwarding TDM data to the customer’s TDM-based equipment MEF 8
TE See – Tunnel End Point MEF 29
Test MEG Test Maintenance Entity Group MEF 30
Tester Special equipment used to generate and monitor traffic for verification purposes MEF 9
Test-MA Test Maintenance Association MEF 25
Test-MEG The MEG used by Service provider to test the connectivity to UNI-C MEF 20
TF Termination Function MEF 12.1
TFP Termination Flow Point MEF 12.1
T-FP Trunk Flow Point MEF 12.1
TL-FP Trunk Leaf Flow Point MEF 12.1
T-Line TDM Line Service MEF 3, 8
TLS Transparent LAN Services BBF TR-178
TLV Type, Length and Value MEF 16, 20, 21, 22.1, 24, 31, 36, 38, 39
T-NID Transport NID MEF 12.1
ToD Time-of-day MEF 35
TPID Tag Protocol Identifier BBF TR-178
TR Technical Report (BBF Term for published technical work) BBF TR-178
Traffic Conditioning A process that classifies the traffic units according to configured rules and ensures traffic is conformant before forwarding the traffic MEF 35
TRAN Transport Layer MEF 2, 4, 12.1, 17
Transport A specific TRANS layer technology MEF 2
TRAN-trail A TRAN-trail (see ITU-T Recommendation G.805) is a “transport entity” responsible for the transfer of information from the input of a trail termination source to the output of a trail termination sink MEF 2
TrCP Traffic Conditioning Point MEF 17
Trunk OVC End Point An OVC End Point that has the role of Trunk MEF 26.1
TSP TDM Service Processing MEF 3, 8
TST Test PDU MEF 31, 38, 39
TTF Trail Termination Function MEF 2
Tunnel End Point (TE) An ESC that represents a collection of ESNC End Points at an EI. It is used to facilitate the description of the externally observable behavior of the case where multiple ESNCs are encapsulated into a single service stream within an ESN MEF 29
Two-way A measurement of the performance of frames that flow from the Controller MEP to the Responder MEP and back again MEF 35, 36
UML Unified Modeling Language MEF 31, 36, 38, 39
UNI User Network Interface VLAN BBF TR-178
UNI ID The Identifier for a UNI MEF 20
UNI Maximum Transmission Unit Size The maximum sized Service Frame allowed at the UNI MEF 10.2
UNI MEG User-to-Network Interface Maintenance Entity Group MEF 30
UNI MTU Size The maximum sized Service Frame allowed at the UNI MEF 6.1, 33
UNI-C The UNI-C is a compound architectural component of a CEN that represents all of the functions required to connect a subscriber to a CEN MEF 2, 12.1, 15, 16, 19, 20, 21, 22.1, 24, 25, 27, 30
Unicast Service Frame A Service Frame that has a unicast destination MAC address MEF 6.1, 7, 9, 10.2, 11, 13, 14, 15, 19, 29, 33
UNI-EVC The part of the EVC between the UNI-N and UNI-C MEF 11
UNI-EVCID The ID that identifies the part of the EVC between the UNI-N and UNI-C. This can be derived from CE-VLAN ID, Physical Port, TRANS Tag or combination of these MEF 11
UNI-MA User-to-Network Interface Maintenance Association MEF 25
UNI-MEG UNI Maintenance Entity Group MEF 20
UNI-N The UNI-N is a compound architectural component of a CEN that represents all of the functions required to connect a CEN to a CEN subscriber MEF 2, 12.1, 15, 16, 19, 20, 21, 22.1, 24, 25, 27, 30
Unscheduled Downtime A time interval not agreed upon by both the Subscriber and Service Provider during which the Service Provider determines that the service is not usable MEF 10.2
Up MEP A MEP residing in a Bridge that transmits SOAM PDUs towards, and receives them from, the direction of the Bridge Relay Entity. See also Down MEP MEF 20, 25, 30
UP/PCP User Priority/Priority Code Point MEF 12.1
User Network Interface The physical demarcation point between the responsibility of the Service Provider and the responsibility of the Subscriber MEF 2, 6.1, 7, 9, 10.2, 11, 14, 15, 19, 21, 23.1, 29, 33
USP User Services Platform WT-369
UTA The UNI Tunnel Access associates a VUNI and remote UNI and is composed of VUNI and remote UNI Components and at least one supporting OVC MEF 12.1, 28
UTA Component A specific set of capabilities which may be used as part of UTA MEF 28
UTA OVC An OVC in the Network Operator’s MEN that provides an association of a remote UNI with an ENNI in support of UTA MEF 28
UTC Coordinated Universal Time MEF 31, 35, 36, 39
VA Virtual Application ETSI NFV
VAS SD-326
vBG Virtual Business Gateway BBF TR-328
VC Virtual Container MEF 3
vCPE Virtual CPE BBF TR-328
vCPE-LSL interface BBF TR-317
vCPU Virtualised CPU ETSI NFV
vE-CPE
Ve-Vnfm VNF/EMS – VNF Manager ETSI NFV
vG Virtual Gateway BBF TR-317
vG host Virtual Gateway host BBF TR-317
vG-LSL Virtual Gateway -Logical Subscriber Link Interface BBF TR-317
vG-WAN Virtual Gateway-Wide Area Network Interface BBF TR-317
VIA Virtual Infrastructure Architecture ETSI NFV
VID VLAN Identifier MEF 25, 30, 31, 35, 38, 39
VIM Virtualised Infrastructure Manager ETSI NFV
Vi-Vnfm Virtualized Infrastructure Manager – VNF Manager ETSI NFV
VLAN Virtual Local Access Network ETSI NFV
VLAN ID VLAN Identifier MEF 12.1
Vl-Ha Virtual Layer Hardware Resources ETSI NFV
VM Virtual Machine ETSI NFV
VM Configuration Virtual Machine Configuration ETSI NFV
VM Image Virtual Machine Image ETSI NFV
VM Instance Virtual Machine Instance ETSI NFV
VNF Virtual Network Function ETSI NFV
VNF FG VNF Forwarding Graph ETSI NFV
VNF Set VNF Set ETSI NFV
VNFaaS VNF as a Service ETSI NFV
VNFC Virtualised Network Function Component ETSI NFV
VNFD Virtualised Network Function Descriptor ETSI NFV
VNFM Virtualised Network Function Manager ETSI NFV
VNIC Virtual Network Interface Controller ETSI NFV
Vn-Nf VNF-NFV Infrastructure
VNPaaS Virtual Network Platform as a Service ETSI NFV
vPE Virtual Provider Edge (Router) ETSI NFV
VPLS Virtual Private LAN Service MEF 12.1, 17, 17
VPN Virtual Private Network IETF
VPWS Virtual Private Wire Service MEF 17
vRG Virtual Residential Gateway BBF TR-317
vSwitch Virtualised Switch ETSI NFV
VT Virtual Tributary MEF 3
VTA Virtual Test Appliance ETSI NFV
VUNI Virtual UNI (VUNI) is the component consisting of a collection of service attributes in the VUNI Provider’s MEN. The VUNI is paired with a remote UNI in a Network Operator’s MEN MEF 12.1, 28, 30
VUNI End Point An End Point at the VUNI Provider’s side of a specific ENNI that associates the ENNI with a VUNI in support of UTA MEF 28
VUNI Provider The Operator MEN providing the VUNI MEF 28
VUNI-N VUNI – Network (Functional Element) MEF 12.1
WAN Wide Area Network MEF 4, 12.1
WCDMA Wideband Code Division Multiple Access MEF 22.1
WEN Wide Area Ethernet Network MEF 12.1
WG Working Group BBF TR-178
WiMAX Worldwide Interoperability for Microwave Access MEF 22.1
WLAN Wireless Local Area Network xAN BBF TR-178
WTR Wait to Restore MEF 2
xSTP Spanning Tree Protocol (multiple variations) MEF 17
YANG A Data Modeling Language for NETCONF MEF 38, 39
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