Index: sys/dev/etherswitch/e6000sw/e6000sw.c
===================================================================
--- sys/dev/etherswitch/e6000sw/e6000sw.c
+++ sys/dev/etherswitch/e6000sw/e6000sw.c
@@ -543,6 +543,9 @@
 		E6000SW_LOCK(sc);
 	}
 
+	while ((sc->ports_mask & (1 << (sc->num_ports - 1))) == 0)
+		--sc->num_ports;
+
 	etherswitch_info.es_nports = sc->num_ports;
 
 	/* Default to port vlan. */