Index: sbin/ifconfig/ifconfig.c
===================================================================
--- sbin/ifconfig/ifconfig.c	(revision 215648)
+++ sbin/ifconfig/ifconfig.c	(working copy)
@@ -295,6 +295,8 @@
 			sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
 		else
 			sdl = NULL;
+		if (sdl != NULL && sdl->sdl_type == IFT_USB)
+			continue;
 		if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly)
 			continue;
 		iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
Index: sys/dev/usb/usb_pf.c
===================================================================
--- sys/dev/usb/usb_pf.c	(revision 215812)
+++ sys/dev/usb/usb_pf.c	(working copy)
@@ -65,6 +65,7 @@
 	ifp = ubus->ifp = if_alloc(IFT_USB);
 	if_initname(ifp, "usbus", device_get_unit(ubus->bdev));
 	if_attach(ifp);
+	if_up(ifp);
 
 	KASSERT(sizeof(struct usbpf_pkthdr) == USBPF_HDR_LEN,
 	    ("wrong USB pf header length (%zd)", sizeof(struct usbpf_pkthdr)));
@@ -86,6 +87,7 @@
 
 	if (ifp != NULL) {
 		bpfdetach(ifp);
+		if_down(ifp);
 		if_detach(ifp);
 		if_free(ifp);
 	}