The following table lists and describes the fields that must be configured for a loopback interface:

Field Description
Interface ID Enter a unique ID for the loopback interface. The ID must be unique across all segments within an Edge and must start from 1, as Zero (0) is not supported.
Segment Select a segment from the drop-down list. The loopback interface belongs to the selected segment.
ICMP Echo Response Select the checkbox to enable the loopback interface to respond to ICMP echo messages.
IPv4 Settings
Addressing Type By default, the addressing type is Static and you cannot modify the type.
IP Address Enter the IPv4 address for the loopback interface.
CIDR Prefix The CIDR prefix for the loopback interface IPv4 address. The default value is /32. You cannot modify the default value.
Advertise Select the checkbox to advertise the loopback interface to other branches in the network.
OSPF
Select the checkbox and choose an OSPF Area from the drop-down list. The loopback interface IP address is advertised in the selected OSPF area.
Note: This option is enabled only when you have configured OSPF for the segment that you have selected for the loopback interface.
IPv6 Settings
Addressing Type By default, the addressing type is Static and you cannot modify the type.
IP Address Enter the IPv6 address for the loopback interface.
CIDR Prefix The CIDR prefix for the loopback interface IP address. The default value is /128. You cannot modify the default value.
Note: You can select the Active checkboxes for the IPv4 and IPv6 settings, to enable the corresponding addressing type for the Interface. By default, the option is enabled for IPv4 settings.

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