Ethernet Operation, Administration and Management 802.1ag CFM
802.1ag CFM
The connectivity fault management (CFM) functionality of the end-to-end network is divided
into hierarchical management spaces referred to as Maintenance Domains. There are three
Maintenance Domain levels: Operator, Service Provider and Customer. The hierarchical
relationship is based on numerically assigned values from 0 to 7 that correspond to the levels
- Operator level being the lowest (lower numbers) and Customer being the highest. The
operator domain usually refers to a partner carrier network accommodating end-to-end links
that involve a number of intermediate service providers for transport.
Domains are demarcated by Maintenance End Points (MEPs). These generate and manage
end-to-end sessions. The MEPs receive OAM information via Maintenance Intermediate
Points (MIPs). MIPs also provide troubleshooting information for fault isolation. All MEPs
belonging to a common service or provider are grouped under common entity: Maintenance
Association (MA).
802.1ag OAM Configuration Overview
All NEs should be configured to operate using the same standard (802.1ag or Y.1731).
To configure the NE performing by 802.1ag standard perform the following procedure:
1. Enable the 802.1ag OAM option on the ML unit.
2. Configure the Maintenance Domains.
3. Allocate the MIPs that comprise each Maintenance Domain.
4. Select the Maintenance Associations in each domain.
5. For each Maintenance Association, configure the defining MEPs.
Setting ML to Operate with 802.1ag
Begin by setting the ML unit to operate with the 802.1ag standard. All the relevant options
will become available.
NOTE: Refer to 802.1ag OAM Configuration Overview (on page 11-2) for an overview of the
complete configuration procedure.
To set the ML unit to operate with 802.1ag
1. In the Element Tree, under Ethernet Services, select Service CFM. The Service CFM
pane appears.
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