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<registry xmlns="http://www.iana.org/assignments" id="bootp-dhcp-parameters">
  <title>Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters</title>
  <updated>2010-11-01</updated>
  <note>For the Civic Address Types Registry <xref type="rfc" data="rfc4776"/>, please see:
http://www.iana.org/assignments/civic-address-types-registry</note>
  <registry id="bootp-dhcp-parameters-1">
    <title>BOOTP Vendor Extensions and DHCP Options</title>

    <xref type="rfc" data="rfc2939"/>
    <registration_rule>IETF Consensus</registration_rule>
    <note>The Bootstrap Protocol (BOOTP) <xref type="rfc" data="rfc951"/> describes an IP/UDP bootstrap
protocol (BOOTP) which allows a diskless client machine to discover
its own IP address, the address of a server host, and the name of a
file to be loaded into memory and executed.  The Dynamic Host
Configuration Protocol (DHCP) <xref type="rfc" data="rfc2131"/> provides a framework for
automatic configuration of IP hosts.  The document "DHCP Options and
BOOTP Vendor Information Extensions" <xref type="rfc" data="rfc2132"/> describes options for
DHCP, some of which can also be used with BOOTP. Additional DHCP
options are described in other RFCs, as documented in this registry.</note>
    <record>
      <value>0</value>

      <name>Pad</name>
      <length>0</length>
      <description>None</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>1</value>

      <name>Subnet Mask</name>
      <length>4</length>
      <description>Subnet Mask Value</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>2</value>

      <name>Time Offset</name>
      <length>4</length>
      <description>Time Offset in Seconds from UTC                   
(note: deprecated by 100 and 101)</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>3</value>

      <name>Router</name>
      <length>N</length>
      <description>N/4 Router addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>4</value>

      <name>Time Server</name>
      <length>N</length>
      <description>N/4 Timeserver addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>5</value>

      <name>Name Server</name>
      <length>N</length>
      <description>N/4 IEN-116 Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>6</value>

      <name>Domain Server</name>
      <length>N</length>
      <description>N/4 DNS Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>7</value>

      <name>Log Server</name>
      <length>N</length>
      <description>N/4 Logging Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>8</value>

      <name>Quotes Server</name>
      <length>N</length>
      <description>N/4 Quotes Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>9</value>

      <name>LPR Server</name>
      <length>N</length>
      <description>N/4 Printer Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>10</value>

      <name>Impress Server</name>
      <length>N</length>
      <description>N/4 Impress Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>11</value>

      <name>RLP Server</name>
      <length>N</length>
      <description>N/4 RLP Server addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>12</value>

      <name>Hostname</name>
      <length>N</length>
      <description>Hostname string</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>13</value>

      <name>Boot File Size</name>
      <length>2</length>
      <description>Size of boot file in 512 byte chunks</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>14</value>

      <name>Merit Dump File</name>
      <length>N</length>
      <description>Client to dump and name the file to dump it to</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>15</value>

      <name>Domain Name</name>
      <length>N</length>
      <description>The DNS domain name of the client</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>16</value>

      <name>Swap Server</name>
      <length>N</length>
      <description>Swap Server address</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>17</value>

      <name>Root Path</name>
      <length>N</length>
      <description>Path name for root disk</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>18</value>

      <name>Extension File</name>
      <length>N</length>
      <description>Path name for more BOOTP info</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>19</value>

      <name>Forward On/Off</name>
      <length>1</length>
      <description>Enable/Disable IP Forwarding</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>20</value>

      <name>SrcRte On/Off</name>
      <length>1</length>
      <description>Enable/Disable Source Routing</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>21</value>

      <name>Policy Filter</name>
      <length>N</length>
      <description>Routing Policy Filters</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>22</value>

      <name>Max DG Assembly</name>
      <length>2</length>
      <description>Max Datagram Reassembly Size</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>23</value>

      <name>Default IP TTL</name>
      <length>1</length>
      <description>Default IP Time to Live</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>24</value>

      <name>MTU Timeout</name>
      <length>4</length>
      <description>Path MTU Aging Timeout</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>25</value>

      <name>MTU Plateau</name>
      <length>N</length>
      <description>Path MTU  Plateau Table</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>26</value>

      <name>MTU Interface</name>
      <length>2</length>
      <description>Interface MTU Size</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>27</value>

      <name>MTU Subnet</name>
      <length>1</length>
      <description>All Subnets are Local</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>28</value>

      <name>Broadcast Address</name>
      <length>4</length>
      <description>Broadcast Address</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>29</value>

      <name>Mask Discovery</name>
      <length>1</length>
      <description>Perform Mask Discovery</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>30</value>

      <name>Mask Supplier</name>
      <length>1</length>
      <description>Provide Mask to Others</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>31</value>

      <name>Router Discovery</name>
      <length>1</length>
      <description>Perform Router Discovery</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>32</value>

      <name>Router Request</name>
      <length>4</length>
      <description>Router Solicitation Address</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>33</value>

      <name>Static Route</name>
      <length>N</length>
      <description>Static Routing Table</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>34</value>

      <name>Trailers</name>
      <length>1</length>
      <description>Trailer Encapsulation</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>35</value>

      <name>ARP Timeout</name>
      <length>4</length>
      <description>ARP Cache Timeout</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>36</value>

      <name>Ethernet</name>
      <length>1</length>
      <description>Ethernet Encapsulation</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>37</value>

      <name>Default TCP TTL</name>
      <length>1</length>
      <description>Default TCP Time to Live</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>38</value>

      <name>Keepalive Time</name>
      <length>4</length>
      <description>TCP Keepalive Interval</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>39</value>

      <name>Keepalive Data</name>
      <length>1</length>
      <description>TCP Keepalive Garbage</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>40</value>

      <name>NIS Domain</name>
      <length>N</length>
      <description>NIS Domain Name</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>41</value>

      <name>NIS Servers</name>
      <length>N</length>
      <description>NIS Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>42</value>

      <name>NTP Servers</name>
      <length>N</length>
      <description>NTP Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>43</value>

      <name>Vendor Specific</name>
      <length>N</length>
      <description>Vendor Specific Information</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>44</value>

      <name>NETBIOS Name Srv</name>
      <length>N</length>
      <description>NETBIOS Name Servers</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>45</value>

      <name>NETBIOS Dist Srv</name>
      <length>N</length>
      <description>NETBIOS Datagram Distribution</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>46</value>

      <name>NETBIOS Node Type</name>
      <length>1</length>
      <description>NETBIOS Node Type</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>47</value>

      <name>NETBIOS Scope</name>
      <length>N</length>
      <description>NETBIOS Scope</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>48</value>

      <name>X Window Font</name>
      <length>N</length>
      <description>X Window Font Server</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>49</value>

      <name>X Window Manager</name>
      <length>N</length>
      <description>X Window Display Manager</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>50</value>

      <name>Address Request</name>
      <length>4</length>
      <description>Requested IP Address</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>51</value>

      <name>Address Time</name>
      <length>4</length>
      <description>IP Address Lease Time</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>52</value>

      <name>Overload</name>
      <length>1</length>
      <description>Overload "sname" or "file"</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>53</value>

      <name>DHCP Msg Type</name>
      <length>1</length>
      <description>DHCP Message Type</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>54</value>

      <name>DHCP Server Id</name>
      <length>4</length>
      <description>DHCP Server Identification</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>55</value>

      <name>Parameter List</name>
      <length>N</length>
      <description>Parameter Request List</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>56</value>

      <name>DHCP Message</name>
      <length>N</length>
      <description>DHCP Error Message</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>57</value>

      <name>DHCP Max Msg Size</name>
      <length>2</length>
      <description>DHCP Maximum Message Size</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>58</value>

      <name>Renewal Time</name>
      <length>4</length>
      <description>DHCP Renewal (T1) Time</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>59</value>

      <name>Rebinding Time</name>
      <length>4</length>
      <description>DHCP Rebinding (T2) Time</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>60</value>

      <name>Class Id</name>
      <length>N</length>
      <description>Class Identifier</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>61</value>

      <name>Client Id</name>
      <length>N</length>
      <description>Client Identifier</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>62</value>

      <name>NetWare/IP Domain</name>
      <length>N</length>
      <description>NetWare/IP Domain Name</description>
      <xref type="rfc" data="rfc2242"/>
    </record>
    <record>
      <value>63</value>

      <name>NetWare/IP Option</name>
      <length>N</length>
      <description>NetWare/IP sub Options</description>
      <xref type="rfc" data="rfc2242"/>
    </record>
    <record>
      <value>64</value>

      <name>NIS-Domain-Name</name>
      <length>N</length>
      <description>NIS+ v3 Client Domain Name</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>65</value>

      <name>NIS-Server-Addr</name>
      <length>N</length>
      <description>NIS+ v3 Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>66</value>

      <name>Server-Name</name>
      <length>N</length>
      <description>TFTP Server Name</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>67</value>

      <name>Bootfile-Name</name>
      <length>N</length>
      <description>Boot File Name</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>68</value>

      <name>Home-Agent-Addrs</name>
      <length>N</length>
      <description>Home Agent Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>69</value>

      <name>SMTP-Server</name>
      <length>N</length>
      <description>Simple Mail Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>70</value>

      <name>POP3-Server</name>
      <length>N</length>
      <description>Post Office Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>71</value>

      <name>NNTP-Server</name>
      <length>N</length>
      <description>Network News Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>72</value>

      <name>WWW-Server</name>
      <length>N</length>
      <description>WWW Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>73</value>

      <name>Finger-Server</name>
      <length>N</length>
      <description>Finger Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>74</value>

      <name>IRC-Server</name>
      <length>N</length>
      <description>Chat Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>75</value>

      <name>StreetTalk-Server</name>
      <length>N</length>
      <description>StreetTalk Server Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>76</value>

      <name>STDA-Server</name>
      <length>N</length>
      <description>ST Directory Assist. Addresses</description>
      <xref type="rfc" data="rfc2132"/>
    </record>
    <record>
      <value>77</value>

      <name>User-Class</name>
      <length>N</length>
      <description>User Class Information</description>
      <xref type="rfc" data="rfc3004"/>
    </record>
    <record>
      <value>78</value>

      <name>Directory Agent</name>
      <length>N</length>
      <description>directory agent information</description>
      <xref type="rfc" data="rfc2610"/>
    </record>
    <record>
      <value>79</value>

      <name>Service Scope</name>
      <length>N</length>
      <description>service location agent scope</description>
      <xref type="rfc" data="rfc2610"/>
    </record>
    <record>
      <value>80</value>

      <name>Rapid Commit</name>
      <length>0</length>
      <description>Rapid Commit</description>
      <xref type="rfc" data="rfc4039"/>
    </record>
    <record>
      <value>81</value>

      <name>Client FQDN</name>
      <length>N</length>
      <description>Fully Qualified Domain Name</description>
      <xref type="rfc" data="rfc4702"/>
    </record>
    <record>
      <value>82</value>

      <name>Relay Agent Information</name>
      <length>N</length>
      <description>Relay Agent Information</description>
      <xref type="rfc" data="rfc3046"/>
    </record>
    <record>
      <value>83</value>

      <name>iSNS</name>
      <length>N</length>
      <description>Internet Storage Name Service</description>
      <xref type="rfc" data="rfc4174"/>
    </record>
    <record>
      <value>84</value>

      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>85</value>
      <name>NDS Servers</name>
      <length>N</length>

      <description>Novell Directory Services</description>
      <xref type="rfc" data="rfc2241"/>
    </record>
    <record>
      <value>86</value>
      <name>NDS Tree Name</name>
      <length>N</length>

      <description>Novell Directory Services</description>
      <xref type="rfc" data="rfc2241"/>
    </record>
    <record>
      <value>87</value>
      <name>NDS Context</name>
      <length>N</length>

      <description>Novell Directory Services</description>
      <xref type="rfc" data="rfc2241"/>
    </record>
    <record>
      <value>88</value>
      <name>BCMCS Controller Domain Name list</name>
      <xref type="rfc" data="rfc4280"/>

    </record>
    <record>
      <value>89</value>
      <name>BCMCS Controller IPv4 address option</name>
      <xref type="rfc" data="rfc4280"/>
    </record>
    <record>
      <value>90</value>

      <name>Authentication</name>
      <length>N</length>
      <description>Authentication</description>
      <xref type="rfc" data="rfc3118"/>
    </record>
    <record>
      <value>91</value>

      <name>client-last-transaction-time option</name>
      <xref type="rfc" data="rfc4388"/>
    </record>
    <record>
      <value>92</value>
      <name>associated-ip option</name>
      <xref type="rfc" data="rfc4388"/>

    </record>
    <record>
      <value>93</value>
      <name>Client System</name>
      <length>N</length>
      <description>Client System Architecture</description>
      <xref type="rfc" data="rfc4578"/>

    </record>
    <record>
      <value>94</value>
      <name>Client NDI</name>
      <length>N</length>
      <description>Client Network Device Interface</description>
      <xref type="rfc" data="rfc4578"/>

    </record>
    <record>
      <value>95</value>
      <name>LDAP</name>
      <length>N</length>
      <description>Lightweight Directory Access Protocol</description>
      <xref type="rfc" data="rfc3679"/>

    </record>
    <record>
      <value>96</value>
      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>97</value>

      <name>UUID/GUID</name>
      <length>N</length>
      <description>UUID/GUID-based Client Identifier</description>
      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>98</value>

      <name>User-Auth</name>
      <length>N</length>
      <description>Open Group's User Authentication</description>
      <xref type="rfc" data="rfc2485"/>
    </record>
    <record>
      <value>99</value>

      <name>GEOCONF_CIVIC</name>
      <xref type="rfc" data="rfc4776"/>
    </record>
    <record>
      <value>100</value>
      <name>PCode</name>
      <length>N</length>

      <description>IEEE 1003.1 TZ String</description>
      <xref type="rfc" data="rfc4833"/>
    </record>
    <record>
      <value>101</value>
      <name>TCode</name>
      <length>N</length>

      <description>Reference to the TZ Database</description>
      <xref type="rfc" data="rfc4833"/>
    </record>
    <record>
      <value>102-107</value>
      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>

    </record>
    <record>
      <value>108</value>
      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>109</value>

      <name>Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>110</value>
      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>

    </record>
    <record>
      <value>111</value>
      <name>Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>112</value>

      <name>Netinfo Address</name>
      <length>N</length>
      <description>NetInfo Parent Server Address</description>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>113</value>

      <name>Netinfo Tag</name>
      <length>N</length>
      <description>NetInfo Parent Server Tag</description>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>114</value>

      <name>URL</name>
      <length>N</length>
      <description>URL</description>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>115</value>

      <name>REMOVED/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>116</value>
      <name>Auto-Config</name>
      <length>N</length>

      <description>DHCP Auto-Configuration</description>
      <xref type="rfc" data="rfc2563"/>
    </record>
    <record>
      <value>117</value>
      <name>Name Service Search</name>
      <length>N</length>

      <description>Name Service Search</description>
      <xref type="rfc" data="rfc2937"/>
    </record>
    <record>
      <value>118</value>
      <name>Subnet Selection Option</name>
      <length>4</length>

      <description>Subnet Selection Option</description>
      <xref type="rfc" data="rfc3011"/>
    </record>
    <record>
      <value>119</value>
      <name>Domain Search</name>
      <length>N</length>

      <description>DNS domain search list</description>
      <xref type="rfc" data="rfc3397"/>
    </record>
    <record>
      <value>120</value>
      <name>SIP Servers DHCP Option</name>
      <length>N</length>

      <description>SIP Servers DHCP Option</description>
      <xref type="rfc" data="rfc3361"/>
    </record>
    <record>
      <value>121</value>
      <name>Classless Static Route Option</name>
      <length>N</length>

      <description>Classless Static Route Option</description>
      <xref type="rfc" data="rfc3442"/>
    </record>
    <record>
      <value>122</value>
      <name>CCC</name>
      <length>N</length>

      <description>CableLabs Client Configuration</description>
      <xref type="rfc" data="rfc3495"/>
    </record>
    <record>
      <value>123</value>
      <name>GeoConf Option</name>
      <length>16</length>

      <description>GeoConf Option</description>
      <xref type="rfc" data="rfc3825"/>
    </record>
    <record>
      <value>124</value>
      <name>V-I Vendor Class</name>
      <description>Vendor-Identifying Vendor Class</description>

      <xref type="rfc" data="rfc3925"/>
    </record>
    <record>
      <value>125</value>
      <name>V-I Vendor-Specific Information</name>
      <description>Vendor-Identifying Vendor-Specific Information</description>
      <xref type="rfc" data="rfc3925"/>

    </record>
    <record>
      <value>126</value>
      <name>Removed/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>127</value>

      <name>Removed/Unassigned</name>
      <xref type="rfc" data="rfc3679"/>
    </record>
    <record>
      <value>128</value>
      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>

    </record>
    <record>
      <value>128</value>
      <name>Etherboot signature. 6 bytes:
E4:45:74:68:00:00</name>
    </record>
    <record>
      <value>128</value>

      <name>DOCSIS "full security" server IP
address</name>
    </record>
    <record>
      <value>128</value>
      <name>TFTP Server IP address (for IP
Phone software load)</name>
    </record>
    <record>

      <value>129</value>
      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>129</value>
      <name>Kernel options. Variable length
string</name>

    </record>
    <record>
      <value>129</value>
      <name>Call Server IP address</name>
    </record>
    <record>
      <value>130</value>

      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>130</value>
      <name>Ethernet interface. Variable
length string.</name>
    </record>

    <record>
      <value>130</value>
      <name>Discrimination string (to
identify vendor)</name>
    </record>
    <record>
      <value>131</value>
      <name>PXE - undefined (vendor specific)</name>

      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>131</value>
      <name>Remote statistics server IP address</name>
    </record>
    <record>
      <value>132</value>

      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>132</value>
      <name>IEEE 802.1Q VLAN ID</name>
    </record>

    <record>
      <value>133</value>
      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>133</value>

      <name>IEEE 802.1D/p Layer 2 Priority</name>
    </record>
    <record>
      <value>134</value>
      <name>PXE - undefined (vendor specific)</name>
      <xref type="rfc" data="rfc4578"/>
    </record>

    <record>
      <value>134</value>
      <name>Diffserv Code Point (DSCP) for
VoIP signalling and media streams</name>
    </record>
    <record>
      <value>135</value>
      <name>PXE - undefined (vendor specific)</name>

      <xref type="rfc" data="rfc4578"/>
    </record>
    <record>
      <value>135</value>
      <name>HTTP Proxy for phone-specific
applications</name>
    </record>
    <record>
      <value>136</value>

      <name>OPTION_PANA_AGENT</name>
      <xref type="rfc" data="rfc5192"/>
    </record>
    <record>
      <value>137</value>
      <name>OPTION_V4_LOST</name>
      <xref type="rfc" data="rfc5223"/>

    </record>
    <record>
      <value>138</value>
      <name>OPTION_CAPWAP_AC_V4</name>
      <length>N</length>
      <description>CAPWAP Access Controller addresses</description>
      <xref type="rfc" data="rfc5417"/>

    </record>
    <record>
      <value>139</value>
      <name>OPTION-IPv4_Address-MoS</name>
      <length>N</length>
      <description>a series of suboptions</description>
      <xref type="rfc" data="rfc5678"/>

    </record>
    <record>
      <value>140</value>
      <name>OPTION-IPv4_FQDN-MoS</name>
      <length>N</length>
      <description>a series of suboptions</description>
      <xref type="rfc" data="rfc5678"/>

    </record>
    <record>
      <value>141</value>
      <name>SIP UA Configuration Service Domains</name>
      <length>N</length>
      <description>List of domain names to search for SIP User Agent Configuration </description>
      <xref type="rfc" data="rfc6011"/>

    </record>
    <record>
      <value>142-149</value>
      <name>Unassigned</name>
      <xref type="rfc" data="rfc3942"/>
    </record>
    <record>
      <value>150</value>

      <name>TFTP server address</name>
      <xref type="rfc" data="rfc5859"/>
    </record>
    <record>
      <value>150</value>
      <name>Etherboot</name>
    </record>

    <record>
      <value>150</value>
      <name>GRUB configuration path name</name>
    </record>
    <record>
      <value>151-174</value>
      <name>Unassigned</name>

      <xref type="rfc" data="rfc3942"/>
    </record>
    <record>
      <value>175</value>
      <name>Etherboot (Tentatively Assigned -
2005-06-23)</name>
    </record>
    <record>
      <value>176</value>

      <name>IP Telephone (Tentatively Assigned -
2005-06-23)</name>
    </record>
    <record>
      <value>177</value>
      <name>Etherboot (Tentatively Assigned -
2005-06-23)</name>
    </record>
    <record>

      <value>177</value>
      <name>PacketCable and CableHome (replaced by
122)</name>
    </record>
    <record>
      <value>178-207</value>
      <name>Unassigned</name>
      <xref type="rfc" data="rfc3942"/>

    </record>
    <record>
      <value>208</value>
      <name>PXELINUX Magic</name>
      <length>4</length>
      <description>magic string = F1:00:74:7E</description>
      <xref type="rfc" data="rfc5071"/>

      <xref type="text">Deprecated</xref>
    </record>
    <record>
      <value>209</value>
      <name>Configuration File</name>
      <length>N</length>
      <description>Configuration file</description>

      <xref type="rfc" data="rfc5071"/>
    </record>
    <record>
      <value>210</value>
      <name>Path Prefix</name>
      <length>N</length>
      <description>Path Prefix Option</description>

      <xref type="rfc" data="rfc5071"/>
    </record>
    <record>
      <value>211</value>
      <name>Reboot Time</name>
      <length>4</length>
      <description>Reboot Time</description>

      <xref type="rfc" data="rfc5071"/>
    </record>
    <record>
      <value>212</value>
      <name>OPTION_6RD</name>
      <length>18 + N</length>
      <description>OPTION_6RD with N/4 6rd BR addresses</description>

      <xref type="rfc" data="rfc5969"/>
    </record>
    <record>
      <value>213</value>
      <name>OPTION_V4_ACCESS_DOMAIN</name>
      <length>N</length>
      <description>Access Network Domain Name</description>

      <xref type="rfc" data="rfc5986"/>
    </record>
    <record>
      <value>214-219</value>
      <name>Unassigned</name>
    </record>
    <record>
      <value>220</value>

      <name>Subnet Allocation Option (Tentatively
Assigned - 2005-06-23)</name>
    </record>
    <record>
      <value>221</value>
      <name>Virtual Subnet Selection Option
(Tentatively Assigned - 2005-06-23)</name>
    </record>
    <record>

      <value>222-223</value>
      <name>Unassigned</name>
      <xref type="rfc" data="rfc3942"/>
    </record>
    <record>
      <value>224-254</value>
      <name>Reserved (Private Use)</name>

    </record>
    <record>
      <value>255</value>
      <name>End</name>
      <length>0</length>
      <description>None</description>
      <xref type="rfc" data="rfc2132"/>

    </record>
    <registry id="bootp-dhcp-parameters-2">
      <title>DHCP Message Type 53 Values</title>
      <xref type="rfc" data="rfc2939"/>
      <registration_rule>IETF Consensus</registration_rule>
      <record>
        <value>1</value>

        <name>DHCPDISCOVER</name>
        <xref type="rfc" data="rfc2132"/>
      </record>
      <record>
        <value>2</value>
        <name>DHCPOFFER</name>
        <xref type="rfc" data="rfc2132"/>

      </record>
      <record>
        <value>3</value>
        <name>DHCPREQUEST</name>
        <xref type="rfc" data="rfc2132"/>
      </record>
      <record>
        <value>4</value>

        <name>DHCPDECLINE</name>
        <xref type="rfc" data="rfc2132"/>
      </record>
      <record>
        <value>5</value>
        <name>DHCPACK</name>
        <xref type="rfc" data="rfc2132"/>

      </record>
      <record>
        <value>6</value>
        <name>DHCPNAK</name>
        <xref type="rfc" data="rfc2132"/>
      </record>
      <record>
        <value>7</value>

        <name>DHCPRELEASE</name>
        <xref type="rfc" data="rfc2132"/>
      </record>
      <record>
        <value>8</value>
        <name>DHCPINFORM</name>
        <xref type="rfc" data="rfc2132"/>

      </record>
      <record>
        <value>9</value>
        <name>DHCPFORCERENEW</name>
        <xref type="rfc" data="rfc3203"/>
      </record>
      <record>
        <value>10</value>

        <name>DHCPLEASEQUERY</name>
        <xref type="rfc" data="rfc4388"/>
      </record>
      <record>
        <value>11</value>
        <name>DHCPLEASEUNASSIGNED</name>
        <xref type="rfc" data="rfc4388"/>

      </record>
      <record>
        <value>12</value>
        <name>DHCPLEASEUNKNOWN</name>
        <xref type="rfc" data="rfc4388"/>
      </record>
      <record>
        <value>13</value>

        <name>DHCPLEASEACTIVE</name>
        <xref type="rfc" data="rfc4388"/>
      </record>
    </registry>
    <registry id="bootp-dhcp-parameters-3">
      <title>NetWare/IP Option Type 63 Sub-Option Codes</title>
      <xref type="rfc" data="rfc2242"/>
      <registration_rule>Not defined</registration_rule>

      <record>
        <value>1</value>
        <name>NWIP_DOES_NOT_EXIST</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>2</value>

        <name>NWIP_EXIST_IN_OPTIONS_AREA</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>3</value>
        <name>NWIP_EXIST_IN_SNAME_FILE</name>
        <xref type="rfc" data="rfc2242"/>

      </record>
      <record>
        <value>4</value>
        <name>NWIP_EXIST_BUT_TOO_BIG</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>5</value>

        <name>NSQ_BROADCAST</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>6</value>
        <name>PREFERRED_DSS</name>
        <xref type="rfc" data="rfc2242"/>

      </record>
      <record>
        <value>7</value>
        <name>NEAREST_NWIP_SERVER</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>8</value>

        <name>AUTORETRIES</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>9</value>
        <name>AUTORETRY_SECS</name>
        <xref type="rfc" data="rfc2242"/>

      </record>
      <record>
        <value>10</value>
        <name>NWIP_1_1</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>11</value>

        <name>PRIMARY_DSS</name>
        <xref type="rfc" data="rfc2242"/>
      </record>
      <record>
        <value>12-255</value>
        <name>Unassigned</name>
      </record>

    </registry>
    <registry id="bootp-dhcp-parameters-4">
      <title>DHCP Cablelabs Client Configuration Option Type 122 Sub-Option Codes</title>
      <xref type="rfc" data="rfc3495"/>
      <registration_rule>IETF Consensus</registration_rule>
      <record>
        <value>1</value>

        <description>TSP's Primary DHCP Server Address</description>
        <xref type="rfc" data="rfc3495"/>
      </record>
      <record>
        <value>2</value>
        <description>TSP's Secondary DHCP Server Address</description>
        <xref type="rfc" data="rfc3495"/>

      </record>
      <record>
        <value>3</value>
        <description>TSP's Provisioning Server Address</description>
        <xref type="rfc" data="rfc3495"/>
      </record>
      <record>
        <value>4</value>

        <description>TSP's AS-REQ/AS-REP Backoff and Retry</description>
        <xref type="rfc" data="rfc3495"/>
      </record>
      <record>
        <value>5</value>
        <description>TSP's AP-REQ/AP-REP Backoff and Retry</description>
        <xref type="rfc" data="rfc3495"/>

      </record>
      <record>
        <value>6</value>
        <description>TSP's Kerberos Realm Name</description>
        <xref type="rfc" data="rfc3495"/>
      </record>
      <record>
        <value>7</value>

        <description>TSP's Ticket Granting Server Utilization</description>
        <xref type="rfc" data="rfc3495"/>
      </record>
      <record>
        <value>8</value>
        <description>TSP's Provisioning Timer Value</description>
        <xref type="rfc" data="rfc3495"/>

      </record>
      <record>
        <value>9</value>
        <description>TSP's Security Ticket Control</description>
        <xref type="rfc" data="rfc3594"/>
      </record>
      <record>
        <value>10</value>

        <description>KDC Server Address</description>
        <xref type="rfc" data="rfc3634"/>
      </record>
      <record>
        <value>11-255</value>
        <description>Unassigned</description>
      </record>

    </registry>
    <registry id="bootp-dhcp-parameters-5">
      <title>GeoConf Option fields (Value 123) - The Altitude (AT) field</title>
      <xref type="rfc" data="rfc3825"/>
      <registration_rule>Standards Action</registration_rule>
      <record>
        <value>1</value>

        <description>Meters - in 2s-complement fixed-point 22-bit    
integer part with 8-bit fraction</description>
        <xref type="rfc" data="rfc3825"/>
      </record>
      <record>
        <value>2</value>
        <description>Floors - in 2s-complement fixed-point 22-bit    
integer part with 8-bit fraction</description>
        <xref type="rfc" data="rfc3825"/>

      </record>
    </registry>
    <registry id="bootp-dhcp-parameters-6">
      <title>GeoConf Option fields (Value 123) - The Datum field</title>
      <xref type="rfc" data="rfc3825"/>
      <registration_rule>Standards Action</registration_rule>
      <record>
        <value>1</value>

        <description>WGS 84 - (Geographical 3D)                     
World Geodesic System 1984, CRS Code 4327,
Prime Meridian Name: Greenwich</description>
        <xref type="rfc" data="rfc3825"/>
      </record>
      <record>
        <value>2</value>
        <description>NAD83 - North American Datum 1983,             
CRS Code 4269, Prime Meridian Name: Greenwich;
The associated vertical datum is the North
American Vertical Datum of 1988 (NAVD88)
This datum pair to be used when referencing
locations on land, not near tidal water (which
would use Datum = 3 below)</description>
        <xref type="rfc" data="rfc3825"/>

      </record>
      <record>
        <value>3</value>
        <description>NAD83 - North American Datum 1983,             
CRS Code 4269, Prime Meridian Name: Greenwich;
The associated vertical datum is Mean Lower
Low Water (MLLW)
This datum pair to be used when referencing
locations on water/sea/ocean</description>
        <xref type="rfc" data="rfc3825"/>
      </record>
    </registry>
  </registry>

  <registry id="bootp-dhcp-parameters-7">
    <title>CableLabs Client Configuration Option Ticket Control Mask Bit Definitions</title>
    <xref type="rfc" data="rfc3594"/>
    <registration_rule>IETF Consensus</registration_rule>
    <record>
      <value>0</value>
      <description>the PacketCable Provisioning Server     
used by the CCD.</description>

      <xref type="rfc" data="rfc3594"/>
    </record>
    <record>
      <value>1</value>
      <description>the group of all PacketCable Call       
Management Servers used by the CCD.</description>
      <xref type="rfc" data="rfc3594"/>
    </record>
    <record>

      <value>2-15</value>
      <description>Reserved and MUST be set to 0.</description>
    </record>
  </registry>
  <registry id="bootp-dhcp-parameters-8">
    <title>DHCP Relay Agent Sub-Option Codes</title>
    <xref type="rfc" data="rfc3046"/>

    <registration_rule>IETF Consensus</registration_rule>
    <record>
      <value>1</value>
      <description>Agent Circuit ID Sub-option</description>
      <xref type="rfc" data="rfc3046"/>
    </record>
    <record>

      <value>2</value>
      <description>Agent Remote ID Sub-option</description>
      <xref type="rfc" data="rfc3046"/>
    </record>
    <record date="2001-01">
      <value>3</value>
      <description>Sub-option 3 is reserved and should      
not be assigned at this time;
proprietary and incompatible usages
of this sub-option value have been
seen limited deployment.</description>

      <xref type="person" data="Ralph_Droms"/>
    </record>
    <record>
      <value>4</value>
      <description>DOCSIS Device Class Suboption</description>
      <xref type="rfc" data="rfc3256"/>
    </record>
    <record>

      <value>5</value>
      <description>Link selection Sub-option</description>
      <xref type="rfc" data="rfc3527"/>
    </record>
    <record>
      <value>6</value>
      <description>Subscriber-ID Suboption</description>

      <xref type="rfc" data="rfc3993"/>
    </record>
    <record>
      <value>7</value>
      <description>RADIUS Attributes Sub-option</description>
      <xref type="rfc" data="rfc4014"/>
    </record>
    <record>

      <value>8</value>
      <description>Authentication Suboption</description>
      <xref type="rfc" data="rfc4030"/>
    </record>
    <record>
      <value>9</value>
      <description>Vendor-Specific Information Suboption</description>

      <xref type="rfc" data="rfc4243"/>
    </record>
    <record>
      <value>10</value>
      <description>Relay Agent Flags</description>
      <xref type="rfc" data="rfc5010"/>
    </record>
    <record>

      <value>11</value>
      <description>Server Identifier Override Suboption</description>
      <xref type="rfc" data="rfc5107"/>
    </record>
    <registry id="bootp-dhcp-parameters-9">
      <title>Authentication Suboption (value 8) - Algorithm identifier values</title>
      <xref type="rfc" data="rfc4030"/>

      <registration_rule>IETF Consensus</registration_rule>
      <record>
        <value>0</value>
        <description>Reserved</description>
        <xref type="rfc" data="rfc4030"/>
      </record>
      <record>

        <value>1</value>
        <description>HMAC-SHA1 keyed hash</description>
        <xref type="rfc" data="rfc4030"/>
      </record>
    </registry>
    <registry id="bootp-dhcp-parameters-10">
      <title>Authentication Suboption (value 8) - Replay Detection Method (RDM) identifier values</title>

      <xref type="rfc" data="rfc4030"/>
      <registration_rule>IETF Consensus</registration_rule>
      <record>
        <value>0</value>
        <description>Reserved</description>
        <xref type="rfc" data="rfc4030"/>
      </record>

      <record>
        <value>1</value>
        <description>use of a monotonically increasing counter value</description>
        <xref type="rfc" data="rfc4030"/>
      </record>
    </registry>
    
    <registry id="ieee-80221-service-type">
      <title>IEEE 802.21 Service Type (MoS DHCPv4 Address and FQDN Sub-Options)</title>

      <xref type="rfc" data="rfc5678"/>
      <registration_rule>Standards Action</registration_rule>
      <record>
        <value>0</value>
        <description>Reserved</description>
        <xref type="rfc" data="rfc5678"/>
      </record>

      <record>
        <value>1</value>
        <description>IS</description>
        <xref type="rfc" data="rfc5678"/>
      </record>
      <record>
        <value>2</value>

        <description>CS</description>
        <xref type="rfc" data="rfc5678"/>
      </record>
      <record>
        <value>3</value>
        <description>ES</description>
        <xref type="rfc" data="rfc5678"/>

      </record>
      <record>
        <value>4-254</value>
        <description>Unassigned</description>
      </record>
      <record>
        <value>255</value>

        <description>Reserved</description>
        <xref type="rfc" data="rfc5678"/>
      </record>
    </registry>
    
    
    <registry id="ntp-time-source">
      <title>NTP Time Source Suboptions</title>
      <xref type="rfc" data="rfc5908"/>
      <registration_rule>IETF Review</registration_rule>

      <record>
        <value>1</value>
        <description>NTP_SUBOPTION_SRV_ADDR</description>
        <xref type="rfc" data="rfc5908"/>
      </record>
      <record>
        <value>2</value>

        <description>NTP_SUBOPTION_MC_ADDR</description>
        <xref type="rfc" data="rfc5908"/>
      </record>
      <record>
        <value>3</value>
        <description>NTP_SUBOPTION_SRV_FQDN</description>
        <xref type="rfc" data="rfc5908"/>

      </record>
    </registry>  
    
    
  </registry>
  <people>
    <person id="Ralph_Droms">
      <name>Ralph Droms</name>
      <uri>mailto:rdroms&amp;cisco.com</uri>
      <updated>2001-01</updated>

    </person>
  </people>
</registry>

