Configuring the Network File System (NFS)

Network and server problems

If a client is having NFS trouble, first check that the server is up and running. From a client, enter:

rpcinfo -p server_name

It should display a list of program, version, protocol, and port numbers similar to:

   program vers proto   port
    100000    2   tcp    111  portmapper
    100000    2   udp    111  portmapper
    100017    1   tcp   1024  rexd
    100005    1   udp   1027  mountd
    100003    2   udp   2049  nfs
    100024    1   udp   1039  status
    100024    1   tcp   1025  status
    100021    1   tcp   1026  nlockmgr
    100021    1   udp   1051  nlockmgr
    100021    2   tcp   1032  nlockmgr

The portmapper, mountd, nfs, and status programs are required, as is nlockmgr if you are using NLM. The rexd program is not required.
You can also use rpcinfo to check whether a specific server is running, such as mountd:

rpcinfo -u server_name mountd

This should return:

   program 100005 version 1 ready and waiting

If these steps fail, run the rpcinfo -p command on the server's console to verify that the programs listed above are registered.

If the server is functional but a particular client machine cannot reach it, check the network connections between the machines.

If the server and the network are functional, use ps to check the client daemons. Several biod daemons should be running. For example, the command ps -ef should display lines for biod, as well as lockd and statd.