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Configuring a Loopback Interface
Configuring a Loopback Interface
The loopback interface is always Up to ensure network reliability.
The loopback interface has the following features:
- The loopback interface is always Up and has the loopback feature.
- The loopback interface can be configured with the mask of all 1s.
Based on the preceding features, the loopback interface has the following applications.
- The IP address of a loopback interface is specified as the source address of packets to improve network reliability.
- When no Router ID is configured for dynamic routing protocols, the maximum IP address of the loopback interface is configured as the router ID automatically.
The command set l3-interface loopback {lo | <vrf-name>} address <ip-address> prefix-length 32 can be used to configure a loopback interface.
The following command creates a loopback interface in the default VRF.
admin@Xorplus# set l3-interface loopback lo address 1.1.1.1 prefix-length 32 admin@Xorplus# commit
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