JavaStation Client Software Guide

Optional DHCP Options

The following table lists the DHCP options that can be interpreted by the DHCP client during the JavaStation boot sequence but are not necessarily required for the boot sequence.

Table 2-4 Optional DHCP Options for Booting JavaStation Computers

DHCP Option Name (Number)  

Symbol Name in Solaris dhcptab File


Bootfile Name (67)  


The path name of the initial boot file, which can be a "booter" file or the JavaOS software. The path name is assumed to be relative to the TFTP root directory.  

If this option is not provided, the name of the booter is assumed to be the same as the Client Class Identifier (SUNW.JDM1 for a brick model; SUNW.JSIIep for a tower model) and is assumed to be in the TFTP root directory. See Table 2-6 for more information.

Broadcast Address (28)  


The network broadcast address.  

Router (3) 


The IP address of the router to be used by the JavaStation clients. If not given, the JavaOS software uses router discovery to locate a router.  

Time Server (4)  


The IP address of a server supporting the RFC 868 time protocol.  

N/A (Solaris-specific flag) 


A boolean flag which by its presence tells the DHCP server to renew the leases of clients requesting IP address lease renewal.  

NIS Servers (41) 


If the IP address of an NIS server is not given, the JavaOS software broadcasts looking for NIS servers. (This works only if the NIS server is on the same subnet.) 

NIS Domain Name (40) 


The NIS domain name. 

Vendor-Specific Options (43) 

Symbol names are defined by the user. By convention, use JOScmd1 through JOScmd4,

JOSchksm, and JSBproto

A list of vendor-specific options. See "Vendor-Specific Options".

See "Sample dhcptab File " for examples of how these options are set in dhcptab.