\fBpush_mpls\fR being discarded.
.
.IP \fBpop_mpls\fR:\fIethertype\fR
-Strips the outermost MPLS label stack entry. If the MPLS label
-stripped was the only one, changes the ethertype of a packet to
-\fIethertype\fR, which should not ordinarily be an MPLS Ethertype.
+Strips the outermost MPLS label stack entry.
+Currently the implementation restricts \fIethertype\fR to a non-MPLS Ethertype
+and thus \fBpop_mpls\fR should only be applied to packets with
+an MPLS label stack depth of one.
.
.IP
There are some limitations in the implementation. \fBpop_mpls\fR