MPLS firewall filter support on loopback interface

You can apply an MPLS firewall filter to a loopback interface on a Label Switch Router (LSR). For example, you can match an MPLS packet with ttl=1 along with MPLS qualifiers like label, exp, TCP/UDP source port and destination port, and then specify the accept, discard, or count action. You configure this feature at the [edit firewall family mpls] hierarchy level. The loopback filter on family mpls is supported only as an input filter.