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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 10 Configuring Ethernet OAM
Understanding E-LMI
Enabling E-LMI
You can enable E-LMI globally or on an interface and you can configure the router as a PE device.
Beginning in privileged EXEC mode, follow these steps to enable for E-LMI on the router or on an
interface. Note that the order of the global and interface commands determines the configuration. The
command that is entered last has precedence.
Use the no ethernet lmi global configuration command to globally disable E-LMI. Use the no form of
the ethernet lmi interface configuration command with keywords to disable E-LMI on the interface or
to return the timers to the default settings.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
ethernet lmi global Globally enable E-LMI on all interfaces. By default, the
router is a PE device.
Step 3
interface interface-id Define an interface to configure as an E-LMI interface, and
enter interface configuration mode.
Step 4
ethernet lmi interface Configure Ethernet LMI on the interface. If E-LMI is
enabled globally, it is enabled on all interfaces unless you
disable it on specific interfaces. If E-LMI is disabled
globally, you can use this command to enable it on
specified interfaces.
Step 5
ethernet lmi {n391 value | n393 value | t391 value|
t392 value}
Configure E-LMI parameters for the UNI.
The keywords have these meanings:
• n391 value—Set the event counter on the customer
equipment. The counter polls the status of the UNI and
all Ethernet virtual connections (EVCs). The range is
from 1 to 65000; the default is 360.
• n393 value—Set the event counter for the metro
Ethernet network. The range is from 1 to 10; the
default is 4.
• t391 value—Set the polling timer on the customer
equipment. A polling timer sends status enquiries and
when status messages are not received, records errors.
The range is from 5 to 30 seconds; the default is 10
seconds.
• t392 value—Set the polling verification timer for the
metro Ethernet network or the timer to verify received
status inquiries. The range is from 5 to 30 seconds, or
enter 0 to disable the timer. The default is 15 seconds.
Note The t392 keyword is not supported when the router
is in CE mode.
Step 6
end Return to privileged EXEC mode.
Step 7
show ethernet lmi evc Verify the configuration.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.