+If possible, the interface will be reset to disable reception as well.
+This action does not automatically disable routes using the interface.
+.It Cm ipdst
+This is used to specify an Internet host who is willing to receive
+ip packets encapsulating NS packets bound for a remote network.
+An apparent point to point link is constructed, and
+the address specified will be taken as the NS address and network
+of the destination.
+IP encapsulation of
+.Tn CLNP
+packets is done differently.
+.It Cm metric Ar n
+Set the routing metric of the interface to
+.Ar n ,
+default 0.
+The routing metric is used by the routing protocol
+.Pq Xr routed 8 .
+Higher metrics have the effect of making a route
+less favorable; metrics are counted as addition hops
+to the destination network or host.
+.It Cm netmask Ar mask
+(Inet and Iso)
+Specify how much of the address to reserve for subdividing
+networks into sub-networks.
+The mask includes the network part of the local address
+and the subnet part, which is taken from the host field of the address.
+The mask can be specified as a single hexadecimal number
+with a leading 0x, with a dot-notation Internet address,
+or with a pseudo-network name listed in the network table
+.Xr networks 5 .
+The mask contains 1's for the bit positions in the 32-bit address
+which are to be used for the network and subnet parts,
+and 0's for the host part.
+The mask should contain at least the standard network portion,
+and the subnet field should be contiguous with the network
+portion.
+.\" see
+.\" Xr eon 5 .
+.It Cm nsellength Ar n
+.Pf ( Tn ISO
+only)
+This specifies a trailing number of bytes for a received
+.Tn NSAP
+used for local identification, the remaining leading part of which is
+taken to be the
+.Tn NET
+(Network Entity Title).
+The default value is 1, which is conformant to US
+.Tn GOSIP .
+When an iso address is set in an ifconfig command,
+it is really the
+.Tn NSAP
+which is being specified.
+For example, in
+.Tn US GOSIP ,
+20 hex digits should be
+specified in the
+.Tn ISO NSAP
+to be assigned to the interface.
+There is some evidence that a number different 1 may be useful
+for
+.Tn AFI
+37 type addresses.
+.It Cm trailers
+Request the use of a ``trailer'' link level encapsulation when