Specifications

17-50
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 17 Configuring Ethernet OAM, CFM, and E-LMI
Enabling Ethernet Loopback
Configuring Ethernet Terminal Loopback
BEFORE YOU BEGIN
Review the “Enabling Ethernet Loopback” section on page 17-47.
DETAILED STEPS
To disable Ethernet terminal configuration, enter the no ethernet loopback interface configuration
command.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Define an interface, and enter interface
configuration mode.
Step 3
ethernet loopback terminal [mac-address
{swap | copy}] [timeout {seconds | none}]
supported
Configure Ethernet terminal loopback to test QoS on
the interface. The keywords have these meanings:
• (Optional) Enter mac-address swap to
configure the switch to swap the MAC source
and destination addresses for the loopback
action.
• (Optional) Enter mac-address copy to
configure the switch to copy the MAC source
and destination addresses for the loopback
action. This is the default action if the
mac-address option is not configured.
• (Optional) Enter timeout seconds to set a
loopback timeout period. The range is from 5 to
300 seconds. The default is 60 seconds.
• (Optional) Enter timeout none to set the
loopback to not time out.
Step 4
end Return to privileged EXEC mode.
Step 5
ethernet loopback {start | stop} {interface-id} Turn on (start) or turn off (stop) Ethernet loopback
on an interface.
Note If you try to start terminal loopback on a
routed interface, you receive an error
message and you are not able to start the
loopback.
Step 6
show ethernet loopback [interface-id]
show interface interface-id, show interface
status, show log
Verify the configuration for the switch or for an
interface.
Verify that loopback is running (has been started) on
an interface.
Step 7
copy running-config startup-config (Optional) Save your entries in the configuration
file.