Compaq T1500 manual Netsvc

12Chapter 2

Table 2-2 Additional Vendor-Specific Options

	Option 43		Type/Length/Value for
128-254 Tag	Number	Description	Option 43
	1	Vendor-specific ID.	Integer 4, 0x76583A1C
NETSVC	2	Network service machine and	String, variable, same format
		directory.	as option 18 string.
NOSWAP	3	If this option is provided,	Integer 1, any value.
		swapping is turned off.
REFLASH	4	If this option is provided, the	Integer 1, any value.
		reflash utility is invoked in a
		network-boot environment.
MF_DIR	5	Server and directory where	String, variable, same format
		images reside for reflash	as option 18 string.
		utility.
MF_CFG	6	Server and full pathname to	String, variable, same format
		configuration file for reflash	as option 18 string.
		utility.
XFS	7	X font server list to include.	String, variable, same format
			as option 18 string.
XDMCP	8	XDMCP list.	String, variable, same format
			as option 18 string.
BUDDY_BOOT	9	If this option is provided, it	Integer 1, any value.
		indicates that we are
		providing the client with
		network-boot information for
		use with the Boot Server

feature (also known as “Buddy Boot”).

Since an option can potentially be provided in three places (standard DHCP packet, option 43, and via TFTP with option 18), the precedence rule is defined as:

(1)standard packet, (2) option 43, and (3) TFTP via option 18. Multiple instances of the same tag may occur in the system; only the first occurrence is used by the system. By precedence, we mean that data is read first by processing (1), when that is done, (2) is processed, followed by (3). Any option that is defined is not replaced by subsequent sections.