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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 39 Configuring Ethernet OAM, CFM, and E-LMI
Configuring Ethernet CFM
Ethernet CFM Configuration Guidelines
These are the configuration guidelines and restrictions for CFM:
• CFM is not supported and cannot be configured on routed ports.
• Starting with Cisco IOS Release 12.2(40)SE, CFM is supported on EtherChannel port channels. You
can configure an EtherChannel port channel as MEP or MIP. However, CFM is not supported on
individual ports that belong to an EtherChannel and you cannot add a CFM port to an EtherChannel
group.
• You cannot configure CFM on VLAN interfaces.
• You cannot configure CFM on an EoMPLS port.
• CFM is not supported on private VLAN ports. The configuration is allowed, but does not take affect.
Preparing the Ethernet CFM Network
Beginning in privileged EXEC mode, follow these steps to prepare the network for Ethernet CFM:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
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 3
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.
Step 4
mep archive-hold-time minutes (Optional) Set the number of minutes that data from a
missing maintenance end point (mep) is kept before it is
purged. The range is 1 to 65535; the default is 100 minutes.
Step 5
exit Return to global configuration mode.
Step 6
interface interface-id Specify a physical interface or a port channel to configure,
and enter interface configuration mode.
Step 7
ethernet cfm mip level level-id Configure an operator-level maintenance intermediate
point (MIP) for the domain level-ID defined in Step 3.
Note If you plan to configure a MEP at level 7 on this
interface, do not use this command to configure a
MIP on the interface.
Step 8
exit Return to global configuration mode.