Also emit the arp header

p4src/parsers.p4

@@ -114,6 +114,7 @@ control MyDeparser(packet_out packet, in headers hdr) {
         /* either */
         packet.emit(hdr.ipv4);
         packet.emit(hdr.ipv6);
+        packet.emit(hdr.arp);
 
         /* either */
         packet.emit(hdr.tcp);

p4src/static-mapping.p4

@@ -448,7 +448,6 @@ Echo or Echo Reply Message
             if(v4_arp.apply().hit) {
                 v4_arp_egress.apply();
             }
-
         }
     }
 }