IEEE 802.1ag OAM Connectivity Fault Management in ACX Series Overview
Ethernet interfaces on ACX Series routers support the IEEE 802.1ag standard for Operation,
Administration, and Management (OAM). The IEEE 802.1ag specification provides for
Ethernet connectivity fault management (CFM). The goal of CFM is to monitor an Ethernet
network that may comprise one or more service instances. Junos OS supports IEEE
802.1ag connectivity fault management.
NOTE: ACX Series routers support CFM on aggregated Ethernet interfaces
with continuity check interval of 100 milliseconds or higher.
Network entities such as operators, providers, and customers may be part of different
administrative domains. Each administrative domain is mapped into one maintenance
domain. Maintenance domains are configured with different level values to keep them
separate. Each domain provides enough information for the entities to perform their own
management, perform end-to-end monitoring, and still avoid security breaches.
IEEE 802.1ag OAM is supported on untagged, single VLAN tagged, and stacked VLAN
tagged interfaces.
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Connectivity Fault Management Key Elements on page 1128
Connectivity Fault Management Key Elements
Figure 61 on page 1128 shows the relationships among the customer, provider, and operator
Ethernet bridges, maintenance domains, maintenance association end points (MEPs),
and maintenance intermediate points (MIPs).
Figure 61: Relationship Among MEPs, MIPs, and Maintenance Domain
Levels
NOTE: Maintenance intermediate points (MIP) is supported only on ACX5048
and ACX5096 routers.
Copyright © 2017, Juniper Networks, Inc.1128
ACX Series Universal Access Router Configuration Guide
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