loopback phy

Implements transparent loopback on a physical interface.

Syntax

loopback phy

no loopback phy

Command Default

Transparent loopback is not implemented.

Modes

Ethernet interface configuration mode

Usage Guidelines

Transparent loopback enables a transmission-only link from a network device into an NPB device.

Transparent loopback is often required on a non-NPB (Network Packet Broker) device that forwards traffic to an NPB. It enables egress traffic to the NPB with no ingress cable.

To disable transparent loopback on an interface, use the no form of this command.

Examples

The following example implements transparent loopback on a physical interface.

device# configure terminal
device(config)# interface ethernet 1/2
device(conf-if-eth-1/2)# loopback phy

The following example disables transparent loopback on a physical interface.

device# configure terminal
device(config)# interface ethernet 1/2
device(conf-if-eth-1/2)# no loopback phy