Technical information

Cuda 12000 IP Access Switch CLI Reference Guide
loop 247
loop
Configures the current interface to perform loopback testing. Loopback testing allows you to
verify the connection between the current POS interface and a remote device.
The loopback test allows a ping packet to loop through the remote device and current interface.
If the ping packet completes the loop, the connection is sound; inability to complete the loop
indicates an equipment malfunction within the connection path.
The interface supports two kinds of loopback verification:
■ Line — Configures the interface to loopback data back to the remote router that sent it.
Incoming data is received and then looped back to the sending router without actually
transmitting the packets. This form of loopback is helpful in verifying the connection
between the current interface and a remote router.
■ Internal — Also known as local loopback, configures the interface to loopback outgoing
data that it originates without actually transmitting it over the network. This version of
loopback is helpful in verifying that the POS interface is operational.
By default, no form of loopback is configured on the interface. Use the no loop command to
remove loopback configuration on the current interface.
Mode
interface:pos:csi(<c/s/i>)
Syntax
loop {line | internal}
Arguments
{line | internal} Specifies one of the following values:
■ line – Configures the current interface for line loopback verification.
■ internal – Configures the current interface for internal (local) loopback
verification.