Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

TechLibrary
Navigation
Table of Contents
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    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.

    Connectivity Fault Management Key Elements

    Figure 1 shows the relationships among the customer, provider, and operator Ethernet bridges, maintenance domains, maintenance association end points (MEPs), and maintenance intermediate points (MIPs).

    Figure 1: Relationship Among MEPs, MIPs, and Maintenance Domain Levels

    Relationship Among MEPs, MIPs, and Maintenance Domain Levels

    Note: Maintenance intermediate points (MIP) is supported only on ACX5048 and ACX5096 routers.

    A maintenance association is a set of MEPs configured with the same maintenance association identifier and maintenance domain level. Figure 2 shows the hierarchical relationships between the Ethernet bridge, maintenance domains, maintenance associations, and MEPs.

    Figure 2: Relationship Among Bridges, Maintenance Domains, Maintenance Associations, and MEPs

    Relationship Among Bridges, Maintenance Domains, Maintenance Associations, and MEPs
     

    Related Documentation

     

    Modified: 2015-06-30

    Previous Page Next Page