Chapter 7 Firewall : Multicast forwarding : Multicast routing examples : Example PIM configuration that uses BSR to find the RP : Adding a loopback interface (lo0)
  
Adding a loopback interface (lo0)
Where required, the following command is used to define a loopback interface named lo0.
config system interface
edit lo0
set vdom root
set ip 1.4.50.4 255.255.255.255
set allowaccess ping https ssh snmp http telnet
set type loopback
next
end