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10-3
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
• Ethernet CFM Configuration Restrictions and Guidelines, page 10-3
• Configuring the CFM Domain, page 10-3
• Configuring Multi-UNI CFM MEPs in the Same VPN, page 10-7
• Configuring Ethernet CFM Crosscheck, page 10-12
• Configuring Static Remote MEP, page 10-13
• Configuring a Port MEP, page 10-14
• Configuring SNMP Traps, page 10-15
• Configuring IP SLA CFM Operation, page 10-16
Default Ethernet CFM Configuration
• CFM is globally disabled.
• CFM is enabled on all interfaces when CFM is globally enabled.
• A port can be configured as a flow point (MIP/MEP), a transparent port, or disabled (CFM disabled).
By default, ports are transparent ports until configured as MEP, MIP, or disabled.
• There are no MEPs or MIPs configured.
• When configuring a MEP, if you do not configure direction, the default is up (inward facing).
• For Multi-UNI CFM MEPs (with up direction), port-based model for MAC address assignment is
used instead of bridge brain model.
Ethernet CFM Configuration Restrictions and Guidelines
• You cannot configure CFM on VLAN interfaces.
• CFM is configurable only under EVC and physical or port channel interfaces.
• CFM is supported on ports running MSTP.
• You must configure a port MEP at a lower level than any service (VLAN) MEPs on an interface.
Configuring the CFM Domain
Complete the following steps to configure the Ethernet CFM domain, configure a service to connect the
domain to a VLAN, or configure a port to act as a MEP. You can also enter the optional commands to
configure other parameters, such as continuity checks.
Note You do not need to enter the ethernet cfm ieee global configuration command to configure the CFM
version as IEEE 802.1ag; the CFM version is always 802.1ag and the command is automatically
generated when you enable CFM.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ethernet cfm global Globally enable Ethernet CFM on the router.