Specifications

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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
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Chapter 15 Configuring Ethernet OAM, CFM, and E-LMI
Configuring Ethernet CFM
– Trunk ports configured as MEPs must belong to allowed VLANs
– Access ports configured as MEPs must belong to the native VLAN.
• CFM is not supported on 802.1Q tunnel interfaces.
• You cannot configure CFM on an EoMPLS port.
• A REP port or FlexLink port can also be a service (VLAN) MEP or MIP, but it cannot be a port
MEP.
• CFM is supported on ports running STP.
• You must configure a port MEP at a lower level than any service (VLAN) MEPs on an interface.
Configuring the CFM Domain
Beginning in privileged EXEC mode, follow these 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.
Step 3
ethernet cfm traceroute cache [size entries |
hold-time minutes]
(Optional) Configure the CFM traceroute cache. You can
set a maximum cache size or hold time.
• (Optional) For size, enter the cache size in number of
entry lines. The range is from 1 to 4095; the default is
100 lines.
• (Optional) For hold-time, enter the maximum cache
hold time in minutes. The range is from 1 to 65535; the
default is 100 minutes.
Step 4
ethernet cfm mip auto-create level level-id vlan
vlan-id
(Optional) Configure the router to automatically create
MIPs for VLAN IDS that are not associated with specific
maintenance associations at the specified level. The level
range is 0 to 7.
Note Configure MIP auto-creation only for VLANs that
MIPs should monitor. Configuring for all VLANs
can be CPU and memory-intensive.
Step 5
ethernet cfm mip filter (Optional) Enable MIP filtering, which means that all CFM
frames at a lower level are dropped. The default is disabled.
Step 6
ethernet cfm domain domain-name level level-id Define a CFM domain, set the domain level, and enter
ethernet-cfm configuration mode for the domain. The
maintenance level number range is 0 to 7.