Troubleshooting NFS

Most problems involving NFS network services lie in one of the following areas:

• ``Slow network adapters''

• ``Network and server problems''

• ``rnode table overflow''

• ``Remote mount failed''

• ``Programs are hung''

• ``Everything works slowly''

• ``Validation errors''

• ``Nonexistent NFS server''

• ``Troubleshooting failed lock requests''

• ``Clock skew in user programs''

Command	Function
rpcinfo(NADM)	displays RPC information from a specified RPC server. Use rpcinfo to make sure theportmapper (/etc/portmap) is running and to ensure the Network Lock Manager is running. If exporting filesystems, the mountd service should be registered.
showmount(NADM)	displays the clients that have remotely mounted filesystems from a specified server.
nfsstat(NADM)	displays statistical information about NFS and about Remote Procedure Call (RPC) interfaces to the kernel; can also be used to reinitialize this information.
netstat(TC)	displays statistical information about TCP/IP; it is particularly helpful for identifying physical network problems.
ping(ADMN)	reports roundtrip time and packet loss statistics. Use ping to ensure a network connection can be made between hosts.

See also:

• ``Troubleshooting system-level problems''

• ``Troubleshooting TCP/IP''