This MIB module contains the management objects for the
management of Ethernet Services Operations, Administration
and Maintenance for Performance Monitoring.
Copyright 2010, 2011, 2012 Metro Ethernet Forum
All rights reserved.
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Reference Overview
A number of base documents have been used to create the Textual Conventions
MIB, the SOAM-PM MIB and SOAM-FM extension MIB. The following are the
abbreviations for the baseline documents:
[CFM] refers to 'Connectivity Fault Management', IEEE 802.1ag-2007,
December 2007
[MEF7.1] refers to MEF 7.1 'Phase 2 EMS-NMS Information Model',
October 2009
[MEF17] refers to MEF 17 'Service OAM Requirements & Framework - Phase 1',
April 2007
[MEF10.2.1] refers to MEF 10.2.1 'Ethernet Services Attributes Phase 2',
January 2011
[MEF SOAM-PM] refers to MEF 35 'Service OAM Performance Monitoring
Implementation Agreement', January 2012
[MEF SOAM-FM] refers to MEF 30 'Service OAM Fault Management Implementation
Agreement', January 2011
[Q.840.1] refers to 'ITU-T Requirements and analysis for NMS-EMS
management interface of Ethernet over Transport and Metro Ethernet
Network (EoT/MEN)', March 2007
[Y.1731] refers to ITU-T Y.1731 'OAM functions and mechanisms for Ethernet
based networks', February 2011
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Abbreviations Used
Term Definition
Availability Performance A measure of the percentage of time within a
specified time interval during which the frame loss is small
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.
BSS Business Support System
CCM Continuity Check Message
CFM Connectivity Fault Management
CHLI Consecutive High Loss Interval, a sequence of small time intervals
contained in T, each with high frame loss ratio
Controller MEP The Controller MEP initiates SOAM PDUs, and receives responses
from the Responder MEP.
CoS Class of Service
DM Delay Measurement
Dual-Ended A type of process where a MEP sends measurement information to a peer
MEP that will perform the calculations.
EMS Element Management System
ETH-DM Ethernet Delay Measurement function
ETH-LM Ethernet Loss Measurement function
ETH-SLM Ethernet Synthetic Frame Loss Measurement function
EVC Ethernet Virtual Connection
FD Frame Delay
FDR Frame Delay Range
FLR Frame Loss Ratio
FM Fault Management
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.
HLI High Loss Interval, a small time interval contained in T with a
high frame loss ratio
IEEE Institute of Electrical and Electronics Engineers
IETF Internet Engineering Task Force
IFDV Inter-Frame Delay Variation
ITU-T International Telecommunication Union - Telecommunication
Standardization Bureau
LAN Local Area Network
LM Loss Measurement
MAC Media Access Control
MA Maintenance Association (equivalent to a MEG)
MD Maintenance Domain (equivalent to a OAM Domain in MEF 17)
MD Level Maintenance Domain Level (equivalent to a MEG level)
ME Maintenance Entity
Measurement Bin A Measurement Bin is a counter that stores the number of
performance measurements falling within a specified range, during
a Measurement Interval
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 Metro Ethernet Forum
MEG Maintenance Entity Group (equivalent to a MA)
MEG Level Maintenance Entity Group Level (equivalent to MD Level)
MEN Metro Ethernet Network
MEP Maintenance Association End Point or MEG End Point
MFD Mean Frame Delay
MIB Management Information Base
MIP Maintenance Domain Intermediate Point or MEG Intermediate Point
MP Maintenance Point. One of either a MEP or a MIP
NE Network Element
NMS Network Management System
OAM Operations, Administration, and Maintenance 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
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.
OSS Operations Support System
PDU Protocol Data Unit
PM Performance Monitoring
PM Function A MEP capability specified for performance monitoring purposes
(e.g., Single-Ended Delay, Single-Ended Synthetic Loss)
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.
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.
PM Tool A generic term used to discuss the application of a PM Function.
Proactive OAM actions that are carried on continuously to permit timely reporting
of fault and/or performance status.
Resiliency Performance The number of High Loss Intervals and Consecutive High
Loss Intervals in T
Responder MEP In a single-ended session, the Responder MEP receives SOAM PDUs,
from the Controller MEP, and transmits a response to the
Controller MEP. SOAM-PM
RFC Request for Comment
Service Frame An Ethernet frame transmitted across the UNI toward the Service
Provider or an Ethernet frame transmitted across the UNI toward
the Subscriber
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.
Sink MEP In a dual-ended session, the Sink MEP receives SOAM PDUs, from the
Controller MEP and performs the performance calculations.
SLM Synthetic Loss Measurement
SNMP Simple Network Management Protocol
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.
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.
SOAM Service OAM
SOAM PDU Service OAM frame, or Protocol Data Unit. Specifically, those PDUs
defined in [IEEE 802.1ag], [ITU-T Y.1731], or MEF specifications
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).
T Time Interval for SLS Metrics. The time over which a Performance
Metric is defined. T is at least as large as the Measurement
Interval, and generally consists of multiple Measurement
Intervals.
TC Textual Conventions
TLV Type Length Value, a method of encoding Objects
Two-way A measurement of the performance of frames that flow from the
Controller MEP to Responder MEP and back again.
UML Unified Modeling Language
UTC Coordinated Universal Time
UNI User-to-Network Interface
VLAN Virtual LAN
