G.8032 Ethernet Ring Protection

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G.8032 Ethernet Ring Protection

Configure interface

Updated: June 18, 2026

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Configure the specific ports used in the Ethernet ring by setting up interface parameters, VLAN trunking, and Maintenance End Points (MEPs).

Configure an interface to enable proper communication and monitoring within an Ethernet ring topology by setting up the necessary port parameters, VLAN configurations, and connectivity fault management settings.

Interfaces are required to configure the specific ports used in the Ethernet ring. This configuration involves setting up the interface type, VLAN trunking parameters, and Maintenance End Points for network monitoring and fault detection.

Before you begin

Follow these steps to configure an interface:

Procedure

1.

Use the interface gigabitethernet type number command to specify the interface type and number.

Example:

Device(config)# interface gigabitethernet 1/3
2.

Use the switchport trunk allowed VLAN VLAN-list command to specify the VLANs that are allowed to traverse when this port is in trunking mode.

Example:

Device(config-if)# switchport trunk allowed vlan 10,100-200

The VLAN-list denotes the range of VLAN-IDs. It should include the VLANs in the inclusion list.

Note

The control VLAN and inclusion VLAN list should match this configuration.
3.

Use the switchport mode trunk command to specify a port on the switch to operate in trunk mode, which allows it to carry traffic from multiple VLANs.

Example:

Device(config-if)# switchport mode trunk
4.

Use the ethernet cfm MEP domain domain-name MPID MPID service VLAN-ID VLAN-ID command to set a port as internal to a maintenance domain and define it as a Maintenance End Point (MEP).

Example:

Device(config-if)# ethernet cfm mep domain g8032_domain mpid 12 service number 10

This procedure uses a service number as an example. You can also use a VLAN-ID or a service name. The domain-name specifies the maintenance domain to which the MEP belongs.

Note

The MPID must be unique on peer devices. No two Maintenance Points within a single service can share the same MPID. Valid values range from 1 to 8191. The VLAN-ID represents the specific VLAN that the MEP will be monitoring within the domain. Valid values range from 1 to 4094. Ideally, the control VLAN should also be used for configuring the service VLAN.