.\"@(#)nfs.5"
-.TH NFS 5 "2 November 2007"
+.TH NFS 5 "9 October 2012"
.SH NAME
nfs \- fstab format and options for the
.B nfs
for NFS versions 2 and 3 only.
.TP 1.5i
.BI proto= netid
-The transport protocol name and protocol family the NFS client uses
-to transmit requests to the NFS server for this mount point.
-If an NFS server has both an IPv4 and an IPv6 address, using a specific
-netid will force the use of IPv4 or IPv6 networking to communicate
-with that server.
-.IP
-If support for TI-RPC is built into the
-.B mount.nfs
-command,
-.I netid
-is a valid netid listed in
-.IR /etc/netconfig .
-The value "rdma" may also be specified.
-If the
-.B mount.nfs
-command does not have TI-RPC support, then
+The
.I netid
-is one of "tcp," "udp," or "rdma," and only IPv4 may be used.
+determines the transport that is used to communicate with the NFS
+server. Available options are
+.BR udp ", " udp6 ", "tcp ", " tcp6 ", and " rdma .
+Those which end in
+.B 6
+use IPv6 addresses and are only available if support for TI-RPC is
+built in. Others use IPv4 addresses.
.IP
Each transport protocol uses different default
.B retrans
through a firewall that blocks the rpcbind protocol.
.TP 1.5i
.BI mountproto= netid
-The transport protocol name and protocol family the NFS client uses
+The transport the NFS client uses
to transmit requests to the NFS server's mountd service when performing
this mount request, and when later unmounting this mount point.
.IP
-If support for TI-RPC is built into the
+.I netid
+may be one of
+.BR udp ", and " tcp
+which use IPv4 address or, if TI-RPC is built into the
.B mount.nfs
command,
-.I netid
-is a valid netid listed in
-.IR /etc/netconfig .
-Otherwise,
-.I netid
-is one of "tcp" or "udp," and only IPv4 may be used.
+.BR udp6 ", and " tcp6
+which use IPv6 addresses.
.IP
This option can be used when mounting an NFS server
through a firewall that blocks a particular transport.
for NFS version 4 and newer.
.TP 1.5i
.BI proto= netid
-The transport protocol name and protocol family the NFS client uses
-to transmit requests to the NFS server for this mount point.
-If an NFS server has both an IPv4 and an IPv6 address, using a specific
-netid will force the use of IPv4 or IPv6 networking to communicate
-with that server.
-.IP
-If support for TI-RPC is built into the
-.B mount.nfs
-command,
-.I netid
-is a valid netid listed in
-.IR /etc/netconfig .
-Otherwise,
+The
.I netid
-is one of "tcp" or "udp," and only IPv4 may be used.
+determines the transport that is used to communicate with the NFS
+server. Supported options are
+.BR tcp ", " tcp6 ", and " rdma .
+.B tcp6
+use IPv6 addresses and is only available if support for TI-RPC is
+built in. Both others use IPv4 addresses.
.IP
All NFS version 4 servers are required to support TCP,
so if this mount option is not specified, the NFS version 4 client
the behavior of this option in more detail.
.TP 1.5i
.BI clientaddr= n.n.n.n
+.TP 1.5i
+.BI clientaddr= n:n: ... :n
Specifies a single IPv4 address (in dotted-quad form),
or a non-link-local IPv6 address,
that the NFS client advertises to allow servers