Switching Commands
26
M4100 Series ProSAFE Managed Switches
Loopback Interface Commands
The commands in this section describe how to create, delete, and manage loopback
interfaces. A loopback interface is always expected to be up. This interface can provide the
source address for sent packets and can receive both local and remote packets. The
loopback interface is typically used by routing protocols.
To assign an IP address to the loopback interface, see ip address on page 234.
interface loopback
Use this command to enter the Interface Config mode for a loopback interface. The range of
the loopback ID is 0–7.
no interface loopback
This command removes the loopback interface and associated configuration parameters for
the specified loopback interface.
show interface loopback
This command displays information about configured loopback interfaces.
If you do not specify a loopback ID, the following information appears for each loopback
interface on the system:
Format interface loopback <loopback-id>
Mode Global Config
Format no interface loopback <loopback-id>
Mode Global Config
Format show interface loopback [<loopback-id>]
Mode Privileged EXEC
Term Definition
Loopback ID The loopback ID associated with the rest of the information in the row.
Interface The interface name.
IP Address The IPv4 address of the interface.
Received
Packets
The number of packets received on this interface.
Sent Packets The number of packets transmitted from this interface.
IPv6 Address The IPv6 address of this interface.
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