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Cisco ASR 901 Aggregation Services Router Command Reference Guide
OL-26031-07
Chapter 1 CLI Command Reference
ethernet loopback
ethernet loopback
To start or stop an ethernet loopback function on an interface, use the
ethernet loopback
privileged
EXEC command.
ethernet loopback start local interface
type number
[
service instance
instance-number
]
{
external
|
internal
}
source mac-address
source
-
address
[
destination mac-address
destination-address
]
timeout
{
time-in-seconds
|
none
}
or
ethernet loopback stop local interface
type number
id
session id
Syntax Description
Command Default
None
Command Modes
Privileged EXEC
Command History
Usage Guidelines
You cannot start terminal loopback. You can configure ethernet loopback and use the
ethernet loopback
start
or
ethernet loopback stop
command only for physical ports and not for VLANs.
start
Starts the Ethernet loopback operation configured on the interface.
stop
Stops the Ethernet loopback operation configured on the interface.
local interface
type
number
Specifies the interface on which to start or stop the loopback operation.
service-instance
instance-number
Specifies the service instance ID. This is an optional field.
external | internal
source mac-address
source-address
Specifies the external or internal source MAC address for the loopback
operation.
destination
mac-address
destination-address
Specifies the destination MAC address for the loopback operation. This is an
optional field.
timeout
{
time-in-seconds
|
none
}
Specifies the timeout interval in seconds. The range is from 0 to 90000
seconds. The default is 300 seconds.
Specify
timeout
none
to set the loopback to no time out.
id
session id
Specifies the data plane loopback session ID. The range is from 1 to 3.
all
Stop all Ethernet loopback operations on the switch. This keyword is
available only after the
stop
keyword.
Release
Modification
15.2(2)SNG
This command was introduced on the Cisco ASR 901 router.