Configuring A Loopback Interface; Establishing The Configuration Task - Huawei AR1200 series Configuration Manual

Huawei AR1200 Series Enterprise Routers
Configuration Guide - Interface Management
The interface view is displayed.
Step 3 Run:
link-protocol fr [ ietf | nonstandard ]
The link layer protocol of the interface is configured as FR.
Step 4 Run:
quit
Return to the system view.
Step 5 Run:
interface interface-type interface-number.subnumber [ p2mp | p2p ]
An FR sub-interface is configured.
subnumber is the number of the sub-interface. The value ranges from 1 to 1024.
The default type of an FR sub-interface is P2MP.
The items described below can be configured on an FR sub-interface.
l Frame Relay address mapping different from the main interface
l IP address which is not in the same network segment as the main interface
l Virtual circuit of the sub-interface
For details about FR sub-interface configuration, refer to FR Configuration in the Huawei
AR1200 Series Enterprise Routers Configuration Guide - WAN Access.
Step 6 Run:
ip address ip-address { mask | mask-length } [ sub ]
An IP address is assigned to the FR sub-interface.
----End

16.4 Configuring a Loopback Interface

Loopback interfaces always remain in the Up state once created and execute the loopback
function.

16.4.1 Establishing the Configuration Task

Before configuring a loopback interface, learn the applicable environment, pre-configuration
tasks, and data required for configuration.
Applicable Environment
As the loopback interface always remains in the Up state once created and executes the loopback
function, it can be used to improve connection reliability.
Loopback interfaces have the following functions:
Issue 01 (2012-04-20)
NOTE
When an interface is configured with a sub-interface, the interval between the shutdown and undo
shutdown commands on the main interface must be at least 15 seconds.
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