Compaq T1500 manual Tftp, Nfs

20Chapter 2

TFTP

TFTP is required in a network-boot environment. The TFTP server loads the terminal’s operating system off the server into memory on the terminal. This operating system then controls all other actions performed from the terminal. This resource is used once each time a network-boot terminal is powered-up. If a local-boot environment uses DHCP, and DHCP supplies option 18, the server named in option 18 must support TFTP. The load on the server is the amount of server resources required to copy approximately 1 MB of data from the server to the terminal, for each terminal being turned on. The address of this server (and the location of the file) is provided to the terminal, either by BOOTP or DHCP (see above).

TFTP can also be used in conjunction with DHCP for providing additional options to the terminal via DHCP option 18.

Note

TFTP is not supported for Microsoft NT.

For most UNIX systems, including Linux, SCO Openserver, and SCO UnixWare, TFTP is launched via the inet program. To activate TFTP in this way, there must be an entry in the /etc/inetd.conf (or /etc/inet/inetd.conf) file whose first column is tftp. Depending upon the platform, TFTP can be run in either a secure manner (every terminal connecting to the server via TFTP has access to only the directory specified in this file) or in an unsecure manner (access to the full system). Consult the documentation for the TFTP server (in.tftpd for Linux and UnixWare, tftpd for SCO Openserver) by running man tftpd on the platform in use by your organization.

NFS

NFS is a protocol that allows directories residing on one computer to be accessed from another computer or terminal.

Note

NFS is not yet supported for Microsoft NT.

This section describes the requirements for NFS configuration with respect to the directory tree that allows a network-boot terminal to have access to the same information as that for a local-boot terminal. (The information describing NFS configuration for the optional network services support is described in Chapter 3 of this document.)