Configuring the Loopback Interface
On the router, you can configure one physical loopback interface, lo0, and one or more addresses on the interface. To do this, include the following statements:
[edit interfaces] lo0 { unit 0 { family inet { loopback-address; <loopback-address2>; ... } } }
When specifying the loopback address, do not include a destination prefix. Also, do not specify a loopback address on any unit number other than unit 0.
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