NFS version 3 and version 4 with TCP/IP protocols

Information for NFS version 3 and version 4 protocols with proto=tcp can be found on the mount man page on a UNIX client. The NFS client automatically selects the proto=tcp option, unless the end-user overrides the option. For example, you can enter this command:

unix$ mount -o vers=2,proto=udp mvshost1:smith /mnt

This example shows a specification of NFS version 2 with udp protocol, even though the client platform can handle the NFS version 4 and tcp protocol.

Users can issue the rpcinfo -p <hostname> to show all the RPC programs available on the server. For example:

$ rpcinfo -p mvshost1

Table 1 shows the information from this command.

Table 1. View of NFS server capability
program	vers	proto	port	service
100000	4	tcp	111	portmapper
100000	3	tcp	111	portmapper
100000	2	tcp	111	portmapper
100000	4	udp	111	portmapper
100000	3	udp	111	portmapper
100000	2	udp	111	portmapper
150001	1	udp	4954	pcnfsd
150001	2	udp	4954	pcnfsd
100024	1	udp	4955	status
100024	1	tcp	4944	status
100021	1	udp	4956	nlockmgr
100021	1	tcp	4945	nlockmgr
100021	3	tcp	4945	nlockmgr
100021	3	udp	4956	nlockmgr
100021	4	tcp	4945	nlockmgr
100021	4	udp	4956	nlockmgr
100003	2	tcp	2049	nfs
100003	2	udp	2049	nfs
100003	3	tcp	2049	nfs
100003	3	udp	2049	nfs
100003	4	tcp	2049	nfs
100059	2	udp	4953
100059	2	tcp	4943
100044	1	udp	4952
100044	1	tcp	4942
100005	1	udp	4951	mountd
100005	1	tcp	4941	mountd
100005	3	tcp	4941	mountd
100005	3	udp	4951	mountd

Users can issue rpcinfo -s <hostname> from Solaris clients to show a concise list of all the RPC programs available on the server.

Here is an example of output from rpcinfo -s <hostname> in an IPv4 environment:

program version(s) netid(s)                         service     owner
 100000  4,3,2     udp,tcp                          rpcbind     superuser
 150001  2,1       udp                              pcnfsd      unknown
 100024  1         tcp,udp                          status      unknown
 100021  4,3,1     tcp,udp                          nlockmgr    unknown
 100003  4,3,2     udp,tcp                          nfs         unknown
 100059  2         tcp,udp                          showattr    unknown
 100044  1         tcp,udp                          mvsmount    unknown
 100005  3,1       tcp,udp                          mountd      unknown

Here is an example of output from rpcinfo -s <hostname> in an IPv4/IPv6 environment:

program version(s) netid(s)                         service     owner
 100000  4,3,2     udp,udp6,tcp,tcp6                rpcbind     superuser
 150001  2,1       udp6,udp                         pcnfsd      unknown
 100024  1         tcp6,tcp,udp6,udp                status      unknown
 100021  4,3,1     tcp6,tcp,udp,udp6                nlockmgr    unknown
 100003  4,3,2     udp6,udp,tcp6,tcp                nfs         unknown
 100059  2         tcp6,tcp,udp6,udp                showattr    unknown
 100044  1         tcp6,tcp,udp6,udp                mvsmount    unknown
 100005  3,1       tcp6,tcp,udp6,udp                mountd      unknown