Can I use firewall filters (or ACLs) with MPLS?
Yes. You can configure an MPLS firewall filter to count packets based on the EXP bits for the top-level MPLS label in a packet. You can then apply this filter to a specific interface. You can also configure a policer for the MPLS filter to police (that is, rate-limit) the traffic on the interface to which the filter is attached.
NOTE: You cannot apply MPLS firewall filters to Ethernet (fxp0) or loopback (lo0) interfaces.
For more information, click Junos OS MPLS for EX Series.