| 0 |
Pad |
1 |
RFC 2132 |
| 1 |
Subnet Mask |
4 |
RFC 2132 |
| 2 |
Time Offset |
4 |
RFC 2132 |
| 3 |
Router |
4*N |
RFC 2132 |
| 4 |
Time Server |
4*N |
RFC 2132 |
| 5 |
Name Server |
4*N |
RFC 2132 |
| 6 |
Domain Server |
4*N |
RFC 2132 |
| 7 |
Log Server |
4*N |
RFC 2132 |
| 8 |
Quotes Server |
4*N |
RFC 2132 |
| 9 |
LPR Server |
4*N |
RFC 2132 |
| 10 |
Impress Server |
4*N |
RFC 2132 |
| 11 |
RLP Server |
4*N |
RFC 2132 |
| 12 |
Hostname |
n |
RFC 2132 |
| 13 |
Boot File Size |
2 |
RFC 2132 |
| 14 |
Merit Dump File |
N |
RFC 2132 |
| 15 |
Domain Name |
n |
RFC 2132 |
| 16 |
Swap Server |
4 |
RFC 2132 |
| 17 |
Root Path |
N |
RFC 2132 |
| 18 |
Extension File |
N |
RFC 2132 |
| 19 |
Forward On/Off |
1 |
RFC 2132 |
| 20 |
SrcRte On/Off |
1 |
RFC 2132 |
| 21 |
Policy Filter |
8*N |
RFC 2132 |
| 22 |
Max DG Assembly |
2 |
RFC 2132 |
| 23 |
Default IP TTL |
1 |
RFC 2132 |
| 24 |
MTU Timeout |
4 |
RFC 2132 |
| 25 |
MTU Plateau |
2*N |
RFC 2132 |
| 26 |
MTU Interface |
2 |
RFC 2132 |
| 27 |
MTU Subnet |
1 |
RFC 2132 |
| 28 |
Broadcast Address |
4 |
RFC 2132 |
| 29 |
Mask Discovery |
1 |
RFC 2132 |
| 30 |
Mask Supplier |
1 |
RFC 2132 |
| 31 |
Router Discovery |
1 |
RFC 2132 |
| 32 |
Router Request |
4 |
RFC 2132 |
| 33 |
Static Route |
8*N |
RFC 2132 |
| 34 |
Trailers |
1 |
RFC 2132 |
| 35 |
ARP Timeout |
4 |
RFC 2132 |
| 36 |
Ethernet |
1 |
RFC 2132 |
| 37 |
Default TCP TTL |
1 |
RFC 2132 |
| 38 |
Keepalive Time |
4 |
RFC 2132 |
| 39 |
Keepalive Data |
1 |
RFC 2132 |
| 40 |
NIS Domain |
N |
RFC 2132 |
| 41 |
NIS Servers |
4*N |
RFC 2132 |
| 42 |
NTP Servers |
4*N |
RFC 2132 |
| 43 |
Vendor Specific |
n |
RFC 2132 |
| 44 |
NETBIOS Name Srv |
4*N |
RFC 2132 |
| 45 |
NETBIOS Dist Srv |
4*N (N>=1) |
RFC 2132 |
| 46 |
NETBIOS Node Type |
1 |
RFC 2132 |
| 47 |
NETBIOS Scope |
N (N>=1) |
RFC 2132 |
| 48 |
X Window Font |
4*N(N>=1) |
RFC 2132 |
| 49 |
X Window Manager |
4*N(N>=1) |
RFC 2132 |
| 50 |
Address Request |
4 |
RFC 2132 |
| 51 |
IP Address Lease Time |
4 |
RFC 2132 |
| 52 |
Overload |
1 |
RFC 2132 |
| 53 |
DHCP Msg Type |
1 |
RFC 2132 |
| 54 |
Server Identifier |
4 |
RFC 2132 |
| 55 |
Parameter List |
n |
RFC 2132 |
| 56 |
DHCP Message |
N (N>=1) |
RFC 2132 |
| 57 |
DHCP Max Msg Size |
2 |
RFC 2132 |
| 58 |
Renewal Time |
4 |
RFC 2132 |
| 59 |
Rebinding Time |
4 |
RFC 2132 |
| 60 |
Class Id |
n |
RFC 2132 |
| 61 |
Client Id |
n |
RFC 2132 |
| 62 |
NetWare/IP Domain |
N (1<=N<=255) |
RFC 2242 |
| 63 |
NetWare/IP Option |
N (1<=N<=255) |
RFC 2242 |
| 64 |
NIS-Domain-Name |
n |
RFC 2132 |
| 65 |
NIS-Server-Addr |
4*N (N>=1) |
RFC 2132 |
| 66 |
Server-Name |
N |
RFC 2132 |
| 67 |
Bootfile-Name |
N |
RFC 2132 |
| 68 |
Home-Agent-Addrs |
4*N(N>=0) |
RFC 2132 |
| 69 |
SMTP-Server |
4*N (N>=1) |
RFC 2132 |
| 70 |
POP3-Server |
4*N (N>=1) |
RFC 2132 |
| 71 |
NNTP-Server |
4*N (N>=1) |
RFC 2132 |
| 72 |
WWW-Server |
4*N (N>=1) |
RFC 2132 |
| 73 |
Finger-Server |
4*N (N>=1) |
RFC 2132 |
| 74 |
IRC-Server |
4*N (N>=1) |
RFC 2132 |
| 75 |
StreetTalk-Server |
4*N (N>=1) |
RFC 2132 |
| 76 |
STDA-Server |
4*N (N>=1) |
RFC 2132 |
| 77 |
User-Class |
n |
RFC 3004 |
| 78 |
Directory Agent |
4*N+1 |
RFC 2610 |
| 79 |
Service Scope |
N |
RFC 2610 |
| 80 |
Rapid Commit |
0 |
RFC 4039 |
| 81 |
Client FQDN |
n (n>=3) |
RFC 4702 |
| 82 |
Relay Agent Information |
n |
RFC 3046 |
| 83 |
iSNS |
N |
RFC 4174 |
| 84 |
REMOVED/Unassigned |
N |
- |
| 85 |
NDS Servers |
4*N (N>=1) |
RFC 2241 |
| 86 |
NDS Tree Name |
N (1<=N<=255) |
RFC 2241 |
| 87 |
NDS Context |
N (1<=N<=255) |
RFC 2241 |
| 88 |
BCMCS Controller Domain Name list |
n |
RFC 4280 |
| 89 |
BCMCS Controller IPv4 address option |
4*n (n>=1) |
RFC 4280 |
| 90 |
Authentication |
N |
RFC 3118 |
| 91 |
client-last-transaction-time option |
4 |
RFC 4338 |
| 92 |
associated-ip option |
4*N |
RFC 4338 |
| 93 |
Client System |
2*N (N>=1 |
RFC 4578 |
| 94 |
Client NDI |
3 |
RFC 4578 |
| 95 |
LDAP |
N |
RFC 3679 |
| 96 |
IPv6 Transition |
N |
RFC 3679 |
| 97 |
UUID/GUID |
N |
RFC 4578 |
| 98 |
User-Auth |
N |
RFC 2485 |
| 99 |
GEOCONF_CIVIC |
n (n>=3) |
RFC 4776 |
| 100 |
PCode |
N |
RFC 4833 |
| 101 |
TCode |
N |
RFC 4833 |
| 102-107 |
REMOVED/Unassigned |
- |
- |
| 108 |
REMOVED/Unassigned |
- |
- |
| 109 |
Unassigned |
- |
- |
| 110 |
REMOVED/Unassigned |
- |
- |
| 111 |
Unassigned |
- |
- |
| 112 |
Netinfo Address |
N |
RFC 3679 |
| 113 |
Netinfo Tag |
N |
RFC 3679 |
| 114 |
URL |
N |
RFC 3679 |
| 115 |
REMOVED/Unassigned |
- |
- |
| 116 |
Auto-Config |
1 |
RFC 2563 |
| 117 |
Name Service Search |
N (N>=2) |
RFC 2937 |
| 118 |
Subnet Selection Option |
4 |
RFC 3011 |
| 119 |
Domain Search |
n |
RFC 3397 |
| 120 |
SIP Servers DHCP Option |
n |
RFC 3361 |
| 121 |
Classless Static Route Option |
n |
RFC 3442 |
| 122 |
CCC |
N (N<=255) |
RFC 3495 |
| 123 |
GeoConf Option |
16 |
RFC 6225 |
| 124 |
V-I Vendor Class |
- |
RFC 3925 |
| 125 |
V-I Vendor-Specific Information |
n |
RFC 3925 |
| 126 |
Removed/Unassigned |
- |
- |
| 127 |
Removed/Unassigned |
- |
- |
| 128 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 128 |
Etherboot signature. 6 bytes: E4:45:74:68:00:00 |
- |
RFC 4578 |
| 128 |
DOCSIS "full security" server IP address |
- |
RFC 4578 |
| 128 |
TFTP Server IP address (for IP Phone software load) |
- |
RFC 4578 |
| 129 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 129 |
Kernel options. Variable length string |
- |
RFC 4578 |
| 129 |
Call Server IP address |
- |
RFC 4578 |
| 130 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 130 |
Ethernet interface. Variable length string. |
- |
RFC 4578 |
| 130 |
Discrimination string (to identify vendor) |
- |
RFC 4578 |
| 131 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 131 |
Remote statistics server IP address |
- |
RFC 4578 |
| 132 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 132 |
IEEE 802.1Q VLAN ID |
- |
RFC 4578 |
| 133 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 133 |
IEEE 802.1D/p Layer 2 Priority |
- |
RFC 4578 |
| 134 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 134 |
Diffserv Code Point (DSCP) for VoIP signalling and media streams |
- |
RFC 4578 |
| 135 |
PXE - undefined (vendor specific) |
- |
RFC 4578 |
| 135 |
HTTP Proxy for phone-specific applications |
- |
RFC 4578 |
| 136 |
OPTION_PANA_AGENT |
4*N (N>=1) |
RFC 5192 |
| 137 |
OPTION_V4_LOST |
N |
RFC 5223 |
| 138 |
OPTION_CAPWAP_AC_V4 |
4*N (N>=1) |
RFC 5417 |
| 139 |
OPTION-IPv4_Address-MoS |
N |
RFC 5678 |
| 140 |
OPTION-IPv4_FQDN-MoS |
N |
RFC 5678 |
| 141 |
SIP UA Configuration Service Domains |
n (n<=255) |
RFC 6011 |
| 142 |
OPTION-IPv4_Address-ANDSF |
4*N |
RFC 6153 |
| 143 |
OPTION-IPv6_Address-ANDSF |
16*N |
RFC 6153 |
| 144 |
GeoLoc |
16 |
RFC 6225 |
| 145-149 |
Unassigned |
- |
- |
| 150 |
TFTP server address (Tentatively Assigned - 2005-06-23) |
4*N (N>=1) |
RFC 5859 |
| 150 |
Etherboot |
- |
- |
| 150 |
GRUB configuration path name |
- |
- |
| 151 |
Unassigned |
- |
- |
| 152 |
Unassigned |
- |
- |
| 153-174 |
Unassigned |
- |
- |
| 175 |
Etherboot (Tentatively Assigned - 2005-06-23) |
- |
- |
| 176 |
IP Telephone (Tentatively Assigned - 2005-06-23) |
- |
- |
| 177 |
Etherboot (Tentatively Assigned - 2005-06-23) |
- |
- |
| 177 |
PacketCable and CableHome (replaced by 122) |
- |
- |
| 178-207 |
Unassigned |
- |
- |
| 208 |
PXELINUX Magic |
4 |
RFC 5071 |
| 209 |
Configuration File |
N |
RFC 5071 |
| 210 |
Path Prefix |
N |
RFC 5071 |
| 211 |
Reboot Time |
4 |
RFC 5071 |
| 212 |
OPTION_6RD |
n |
RFC 5969 |
| 213 |
Access Network Domain Name DHCPv4 Option |
n |
RFC 5986 |
| 214-219 |
|
- |
- |
| 220 |
Subnet Allocation Option (Tentatively Assigned - 2005-06-23) |
- |
- |
| 221 |
Virtual Subnet Selection Option (Tentatively Assigned - 2005-06-23) |
n (n>=1) |
RFC 6607 |
| 222-223 |
Unassigned |
- |
- |
| 224-254 |
Reserved (Private Use) |
- |
- |
| 255 |
End |
1 |
- |
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