Datasheet

Command Reference
PA-E3 and PA-2E3 Serial Port Adapter 11
loopback
To loop the serial interface on a PA-E3 port adapter, use the loopback interface configuration
command. To remove the loopback, use the no form of this command.
loopback {dte | local | network {line | payload}}
no loopback
Syntax Description
Default
Disabled
Command Mode
Interface configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.1 CA.
Use this command for troubleshooting purposes.
To verify that a loopback is configured on the interface, use the show interface serial or show
interfaces loopback EXEC command.
Example
The following example configures the serial interface located in slot 3/0/0 for a local loopback:
interface serial 3/0/0
loopback local
Related Command
show interfaces serial
dte Sets the loopback after the LIU toward the terminal.
local Sets the loopback after going through the framer toward the
terminal.
network {line | payload} Sets the loopback toward the network before going through the
framer (line) or after going through the framer (payload).