G.8032 Ethernet Ring Protection

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G.8032 Ethernet Ring Protection

Enable Ethernet fault detection for a service

Updated: June 18, 2026

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Configure Ethernet Connectivity and Fault Management (CFM) on a device to enable fast convergence for network services.

Enable Ethernet fault detection to help a service achieve fast convergence. Fast convergence is crucial for reliable, resilient, and high-performing network services.

This procedure configures Ethernet Connectivity and Fault Management (CFM) for G.8032 sub-50ms convergence. The platform supports only 3.3ms CCM messages at Maintenance Domain Level 1.

Note

Ethernet Connectivity and Fault Management (CFM) includes a broad range of messages and protocols. For G.8032 sub-50ms convergence, this platform supports only 3.3ms CCM messages at Maintenance Domain Level 1.

Procedure

1.

Use the ethernet CFM IEEE command to enable IEEE-compliant Ethernet CFM on a device.

Example:

Device(config)# ethernet cfm ieee
2.

Use the ethernet CFM global command to globally enable Ethernet CFM.

Example:

Device(config)# ethernet cfm global
3.

Use the ethernet CFM domain domain-name level level command to configure the CFM domain and enter Ethernet CFM configuration mode.

Example:

Device(config)# ethernet cfm domain g8032_domain level 1

The domain-name is the name of the maintenance domain.

The level defines the fault management level within the maintenance domain. We support only level 1.
4.

Use one of these three methods to configure the service.

  • Use the service VLAN-id VLAN-id VLAN VLAN-id direction down command to define a VLAN-id based maintenance association and enter Ethernet CFM service instance configuration mode.
    Device(config-ecfm)# service vlan-id 10 vlan 10 direction down
  • Use the service name VLAN VLAN-id direction down command to define a service name based maintenance association and enter Ethernet CFM service instance configuration mode.
    Device(config-ecfm)# service G8032_Service vlan 10 direction down
  • Use the service number number VLAN VLAN-id direction down command to define a service number based maintenance association and enter Ethernet CFM service instance configuration mode.
    Device(config-ecfm)# service number 12 vlan 10 direction down

    The valid VLAN-id range is from 1 to 4094.
5.

Use the continuity-check command to enable the transmission of 3.3ms continuity check messages.

Example:

Device(config-ecfm-srv)# continuity-check
6.

Use the efd notify g8032 command to enable CFM to notify registered protocols when a defect is detected or cleared, which matches the current fault alarm priority.

Example:

Device(config-ecfm-srv)# efd notify g8032

This command is essential for achieving sub-50ms convergence.