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17-7

System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches

Chapter 17 Configuring Ethernet OAM, CFM, and E-LMI

Configuring Ethernet CFM

Because IP SLAs is a Cisco proprietary feature, interoperability between CFM draft 1 and CFM 802.1ag

is handled automatically by the switch.

For more information about IP SLAs operation with CFM, see the Configuring IP SLAs for

Metro-Ethernet feature module at this URL:

http://www.cisco.com/en/US/docs/ios/ipsla/configuration/guide/sla_metro_ethernet.html

Configuring Ethernet CFM

Configuring Ethernet CFM requires configuring the CFM domain. You can optionally configure and

enable other CFM features such as crosschecking, remote MEP, port MEPs, SNMP traps, and fault

alarms. Note that some of the configuration commands and procedures differ from those used in CFM

draft 1.

• Default Ethernet CFM Configuration, page 17-7

• Ethernet CFM Configuration Guidelines, page 17-7

• Configuring the CFM Domain, page 17-8

• Configuring Ethernet CFM Crosscheck, page 17-12

• Configuring Static Remote MEP, page 17-13

• Configuring a Port MEP, page 17-15

• Configuring SNMP Traps, page 17-17

• Configuring Fault Alarms, page 17-17

• Configuring IP SLAs CFM Operation, page 17-19

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 service, if you do not configure direction, the default is up (inward facing).

Ethernet CFM Configuration Guidelines

• CFM is not supported on and cannot be configured on routed ports or on Layer 3 EtherChannels.

• 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.

• Port MEP is not supported on Layer 2 EtherChannels, or on ports that belong to an EtherChannel.

• You cannot configure CFM on VLAN interfaces.

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