Users Guide

Maintenance End Points

A maintenance end point (MEP) is a logical entity that marks the end point of a domain.

There are two types of MEPs defined in 802.1ag for an 802.1 bridge:

• Up-MEP — monitors the forwarding path internal to a bridge on the customer or provider edge. On Dell Networking systems, the

internal forwarding path is effectively the switch fabric and forwarding engine.

• Down-MEP — monitors the forwarding path external another bridge.

Configure Up-MEPs on ingress ports, ports that send traffic towards the bridge relay. Configure Down-MEPs on egress ports, ports that

send traffic away from the bridge relay.

Figure 5. Maintenance End Points

Implementation Information

The S-Series has a single MAC address for all physical/LAG interfaces and hence only one MEP is allowed per MA (per VLAN or per MD

level).

Configuring the CFM

To configure the CFM, follow these steps:

1. Configure the ecfmacl CAM region using the cam-acl command.

2. Enable Ethernet CFM.

3. Create a Maintenance Domain.

4. Create a Maintenance Association.

5. Create Maintenance Points.

6. Use CFM tools:

a. Continuity Check Messages.

b. Loopback Message and Response.

c. Linktrace Message and Response.

Related Configuration Tasks

• Enable CFM SNMP Traps.

• Display Ethernet CFM Statistics.

802.1ag