Specifications

Appendix C Operation, Administration, and Maintenance (OAM) Installation and Operation Manual
C-2 Reference Architecture RICi-4E1/T1, RICi-8E1/T1 Ver. 2.0
Term Description
Flow Ethernet Virtual Connection : An association of two or more
UNIs that limits the exchange of Service Frames to UNIs in the
Ethernet Virtual Connection
Point-to-point Flow Flow connecting exactly two UNIs
Multipoint-to-Multipoint
Flow
Flow connecting two or more UNIs
Service Instance / Class
of service (CoS)
A set of Service Frames that have a commitment from the
Service Provider to receive a particular level of performance
Service Instance
Identifier (CoS ID)
Service Frame delivery performance is specified for all Service
Frames transported within a flow with a particular Class of
Service instance. The Class of Service instance is identified by a
Class of Service Identifier associated with each Service Frame
(Class of service can be identified by more than one
parameter/frame attribute)
MEP Proactive OAM reference point which is capable to initiate and
terminate proactive OAM frames. MEP is also capable to initiate
and react to diagnostics OAM frames.
MIP A provisioned OAM reference point which is capable to respond
to diagnostics OAM frames initiated by the MEP.
MEP Service Instance
Source
The receiver of OAM frames in each Service Instance
MEP Service Instance
Destination
The transmitter of OAM frames in each Service Instance
C.2 Reference Architecture
Figure C-1 illustrates two OAM flows:
• OAM flow originating from the CPE
The CPE-to-CPE OAM flow is transferred transparently by RICi-4E1/T1, RICi-
8E1/T1 and treated as data.
• OAM flow originating from the RICi-4E1/T1, RICi-8E1/T1 devices.
The RICi-4E1/T1, RICi-8E1/T1 OAM flow runs on a data flow on the same
VLAN.
The RICi-4E1/T1, RICi-8E1/T1 units terminate the OAM flow and can be
referred as a Maintenance Entity (ME). Each device supports up to eight such
MEs. In this case, the RICi-4E1/T1, RICi-8E1/T1 units act as MEPs
(Maintenance End-Points) and not as MIPs (Maintenance Intermediate
Points), and all measurements are performed on the UNI_N to UNI_N
segment.