Customer-Edge Device Configuration; Displaying E-Lmi; Ethernet Cfm And Ethernet Oam Interaction - Cisco 3845 - Security Bundle Router Software Manual

Chapter 32 Configuring Ethernet OAM, CFM, and E-LMI
Use the show ethernet lmi commands to display information that was sent to the CE from the status
request poll. Use the show ethernet service commands to show current status on the device.

Customer-Edge Device Configuration

This example shows the commands necessary to configure E-LMI on the CE device. The switch can only
be configured as the CE device. The example enables E-LMI globally, but you can also enable it only on
a specific interface.
Switch# config t
Switch(config)# ethernet lmi global
Switch(config)# ethernet lmi ce
Switch(config)# exit
For E-LMI to work, any VLANs used on the PE device must also be created on the CE device. Create a
Note
VLAN by entering the vlan vlan-id global configuration command on the CE device, where the vlan-ids
match those on the PE device and configure these VLANs as allowed VLANs by entering the switchport
trunk allowed vlan vlan-ids interface configuration command. Allowed VLANs can receive and send
traffic on the interface in tagged format when in trunking mode.

Displaying E-LMI

You can use the privileged EXEC commands in
Table 32-5 Displaying E-LMI and OAM Manager Information
Command
show ethernet lmi statistics interface interface-id
show ethernet lmi uni map interface [interface-id]

Ethernet CFM and Ethernet OAM Interaction

When the Ethernet OAM Protocol is running on an interface that has CFM MEPs configured, Ethernet
OAM informs CFM of the state of the interface. Interaction is unidirectional from the Ethernet OAM to
the CFM Protocol, and the only information exchanged is the user network interface port status.
The Ethernet OAM Protocol notifies CFM when these conditions occur:
•
•
•
OL-23400-01
Error thresholds are crossed at the local interface.
CFM responds to the notification by sending a port status of Local_Excessive_Errors in the Port
StatusType Length Value (TLV).
Ethernet OAM receives an OAMPDU from the remote side showing that an error threshold is
exceeded on the remote endpoint.
CFM responds to the notification by sending a port status of Remote_Excessive_Errors in the Port
Status TLV.
The local port is set into loopback mode.
Table 32-5
Purpose
Displays Ethernet LMI interface statistics sent to the CE from the
status request poll.
Displays information about the E-LMI UNI VLAN map sent to the CE
from the status request poll.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
to display E-LMI information.
Displaying E-LMI
32-35