1 - SubnetMask

- IPv4 netmask. Set to the value of the --netmask option by default.

2 - TimeOffset

- UTC offset in seconds (32-bit decimal value).

3 - Routers

- Space separated list of IPv4 router addresses.

4 - TimeServers

- Space separated list of IPv4 time server (RFC 868) addresses.

5 - NameServers

- Space separated list of IPv4 name server (IEN 116) addresses.

6 - DomainNameServers

- Space separated list of IPv4 DNS addresses.

7 - LogServers

- Space separated list of IPv4 log server addresses.

8 - CookieServers

- Space separated list of IPv4 cookie server (RFC 865) addresses.

9 - LPRServers

- Space separated list of IPv4 line printer server (RFC 1179) addresses.

10 - ImpressServers

- Space separated list of IPv4 imagen impress server addresses.

11 - ResourseLocationServers

- Space separated list of IPv4 resource location (RFC 887) addresses.

12 - HostName

- The client name. See RFC 1035 for character limits.

13 - BootFileSize

- Number of 512 byte blocks making up the boot file (16-bit decimal value).

14 - MeritDumpFile

- Client core file.

15 - DomainName

- Domain name for the client.

16 - SwapServer

- IPv4 address of the swap server that the client should use.

17 - RootPath

- The path to the root disk the client should use.

18 - ExtensionPath

- Path to a file containing additional DHCP options (RFC2123).

19 - IPForwarding

- Whether IP forwarding should be enabled by the client (boolean).

20 - OptNonLocalSourceRouting

- Whether non-local datagrams should be forwarded by the client (boolean)

21 - PolicyFilter

- List of IPv4 addresses and masks pairs controlling non-local source routing.

22 - MaxDgramReassemblySize

- The maximum datagram size the client should reassemble (16-bit decimal value).

23 - DefaultIPTTL

- The default time-to-leave on outgoing (IP) datagrams (8-bit decimal value).

24 - PathMTUAgingTimeout

- RFC1191 path MTU discovery timeout value in seconds (32-bit decimal value).

25 - PathMTUPlateauTable

- RFC1191 path MTU discovery size table, sorted in ascending order (list of 16-bit decimal values).

26 - InterfaceMTU

- The MTU size for the interface (16-bit decimal value).

27 - AllSubnetsAreLocal

- Indicates whether the MTU size is the same for all subnets (boolean).

28 - BroadcastAddress

- Broadcast address (RFC1122) for the client to use (IPv4 address).

29 - PerformMaskDiscovery

- Whether to perform subnet mask discovery via ICMP (boolean).

30 - MaskSupplier

- Whether to respond to subnet mask requests via ICMP (boolean).

31 - PerformRouterDiscovery

- Whether to perform router discovery (RFC1256) (boolean).

32 - RouterSolicitationAddress

- Where to send router solicitation requests (RFC1256) (IPv4 address).

33 - StaticRoute

- List of network and router address pairs addresses.

34 - TrailerEncapsulation

- Whether to negotiate the use of trailers for ARP (RTF893) (boolean).

35 - ARPCacheTimeout

- The timeout in seconds for ARP cache entries (32-bit decimal value).

36 - EthernetEncapsulation

- Whether to use IEEE 802.3 (RTF1042) rather than of v2 (RFC894) ethernet encapsulation (boolean).

37 - TCPDefaultTTL

- Default time-to-live for TCP sends (non-zero 8-bit decimal value).

38 - TCPKeepaliveInterval

- The interface in seconds between TCP keepalive messages (32-bit decimal value).

39 - TCPKeepaliveGarbage

- Whether to include a byte of garbage in TCP keepalive messages for backward compatibility (boolean).

40 - NISDomain

- The NIS (Sun Network Information Services) domain name (string).

41 - NISServers

- Space separated list of IPv4 NIS server addresses.

42 - NTPServers

- Space separated list of IPv4 NTP (RFC1035) server addresses.

43 - VendorSpecificInfo

- Vendor specific information. Only accessible using --set-opt-hex.

44 - NetBIOSNameServers

- Space separated list of IPv4 NetBIOS name server (NBNS) addresses (RFC1001,RFC1002).

45 - NetBIOSDatagramServers

- Space separated list of IPv4 NetBIOS datagram distribution server (NBDD) addresses (RFC1001,RFC1002).

46 - NetBIOSNodeType

- NetBIOS node type (RFC1001,RFC1002): 1=B-node, 2=P-node, 4=M-node, and 8=H-node (8-bit decimal value).

47 - NetBIOSScope

- NetBIOS scope (RFC1001,RFC1002). Only accessible using --set-opt-hex.

48 - XWindowsFontServers

- Space separated list of IPv4 X windows font server addresses.

49 - XWindowsDisplayManager

- Space separated list of IPv4 X windows display manager addresses.

62 - NetWareIPDomainName

- Netware IP domain name (RFC2242) (string).

63 - NetWareIPInformation

- Netware IP information (RFC2242). Only accessible using --set-opt-hex.

64 - NISPlusDomain

- The NIS+ domain name (string).

65 - NISPlusServers

- Space separated list of IPv4 NIS+ server addresses.

66 - TFTPServerName

- TFTP server name (string).

67 - BootfileName

- Bootfile name (string).

68 - MobileIPHomeAgents

- Space separated list of IPv4 mobile IP agent addresses.

69 - SMTPServers

- Space separated list of IPv4 simple mail transport protocol (SMPT) server addresses.

70 - POP3Servers

- Space separated list of IPv4 post office protocol 3 (POP3) server addresses.

71 - NNTPServers

- Space separated list of IPv4 network news transport protocol (NTTP) server addresses.

72 - WWWServers

- Space separated list of default IPv4 world wide web (WWW) server addresses.

73 - FingerServers

- Space separated list of default IPv4 finger server addresses.

74 - IRCServers

- Space separated list of default IPv4 internet relay chat (IRC) server addresses.

75 - StreetTalkServers

- Space separated list of IPv4 StreetTalk server addresses.

76 - STDAServers

- Space separated list of IPv4 StreetTalk directory assistance (STDA) server addresses.

78 - SLPDirectoryAgent

- Addresses of one or more service location protocol (SLP) directory agent, and an indicator of whether their use is mandatory. Only accessible using --set-opt-hex.

79 - SLPServiceScope

- List of service scopes for the service location protocol (SLP) and whether using the list is mandator. Only accessible using --set-opt-hex.

119 - DomainSearch

- Domain search list, see RFC3397 and section 4.1.4 in RFC1035 for encoding. Only accessible using --set-opt-hex.