bridge(4): Note that the bridge does not allow assignment of IP addresses

Document using vether(4) instead to get the same effect.

share/man/man4/bridge.4

@@ -1,4 +1,4 @@
-.\"	$NetBSD: bridge.4,v 1.13 2020/08/01 08:20:47 maxv Exp $
+.\"	$NetBSD: bridge.4,v 1.14 2020/09/27 15:42:48 roy Exp $
 .\"
 .\" Copyright 2001 Wasabi Systems, Inc.
 .\" All rights reserved.
@@ -33,7 +33,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 1, 2020
+.Dd September 27, 2020
 .Dt BRIDGE 4
 .Os
 .Sh NAME
@@ -96,10 +96,18 @@ driver will enable passing of VLAN tagged packets automatically if the underlyin
 interfaces support it.
 This is to facilitate XEN network configurations with
 .Xr xennet 4 .
+.Pp
+It is not possible to assign an IP address directly to the
+.Nm
+interface.
+Instead, assign an IP address to a
+.Xr vether 4
+interface which can be added to the bridge.
 .Sh SEE ALSO
 .Xr l2tp 4 ,
 .Xr options 4 ,
 .Xr xennet 4 ,
+.Xr vether 4 ,
 .Xr brconfig 8 ,
 .Xr ipf 8
 .Sh HISTORY