Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters (last updated 2009-12-07) Registries included below: - BOOTP Vendor Extensions and DHCP Options - DHCP Message Type 53 Values - NetWare/IP Option Type 63 Sub-Option Codes - DHCP Cablelabs Client Configuration Option Type 122 Sub-Option Codes - GeoConf Option fields (Value 123) - The Altitude (AT) field - GeoConf Option fields (Value 123) - The Datum field - CableLabs Client Configuration Option Ticket Control Mask Bit Definitions - DHCP Relay Agent Sub-Option Codes - Authentication Suboption (value 8) - Algorithm identifier values - Authentication Suboption (value 8) - Replay Detection Method (RDM) identifier values - IEEE 802.21 Service Type (MoS DHCPv4 Address and FQDN Sub-Options) Note: For the Civic Address Types Registry [RFC4776], please see: http://www.iana.org/assignments/civic-address-types-registry Registry Name: BOOTP Vendor Extensions and DHCP Options Reference: [RFC2939] Registration Procedures: IETF Consensus Note: The Bootstrap Protocol (BOOTP) [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) [RFC2131] provides a framework for automatic configuration of IP hosts. The document "DHCP Options and BOOTP Vendor Information Extensions" [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. Registry: Data Tag Name Length Meaning Reference -------- ------------------------------- ------ ------------------------------------------------ --------- 0 Pad 0 None [RFC2132] 1 Subnet Mask 4 Subnet Mask Value [RFC2132] 2 Time Offset 4 Time Offset in Seconds from UTC [RFC2132] (note: deprecated by 100 and 101) 3 Router N N/4 Router addresses [RFC2132] 4 Time Server N N/4 Timeserver addresses [RFC2132] 5 Name Server N N/4 IEN-116 Server addresses [RFC2132] 6 Domain Server N N/4 DNS Server addresses [RFC2132] 7 Log Server N N/4 Logging Server addresses [RFC2132] 8 Quotes Server N N/4 Quotes Server addresses [RFC2132] 9 LPR Server N N/4 Printer Server addresses [RFC2132] 10 Impress Server N N/4 Impress Server addresses [RFC2132] 11 RLP Server N N/4 RLP Server addresses [RFC2132] 12 Hostname N Hostname string [RFC2132] 13 Boot File Size 2 Size of boot file in 512 byte chunks [RFC2132] 14 Merit Dump File N Client to dump and name the file to dump it to [RFC2132] 15 Domain Name N The DNS domain name of the client [RFC2132] 16 Swap Server N Swap Server address [RFC2132] 17 Root Path N Path name for root disk [RFC2132] 18 Extension File N Path name for more BOOTP info [RFC2132] 19 Forward On/Off 1 Enable/Disable IP Forwarding [RFC2132] 20 SrcRte On/Off 1 Enable/Disable Source Routing [RFC2132] 21 Policy Filter N Routing Policy Filters [RFC2132] 22 Max DG Assembly 2 Max Datagram Reassembly Size [RFC2132] 23 Default IP TTL 1 Default IP Time to Live [RFC2132] 24 MTU Timeout 4 Path MTU Aging Timeout [RFC2132] 25 MTU Plateau N Path MTU Plateau Table [RFC2132] 26 MTU Interface 2 Interface MTU Size [RFC2132] 27 MTU Subnet 1 All Subnets are Local [RFC2132] 28 Broadcast Address 4 Broadcast Address [RFC2132] 29 Mask Discovery 1 Perform Mask Discovery [RFC2132] 30 Mask Supplier 1 Provide Mask to Others [RFC2132] 31 Router Discovery 1 Perform Router Discovery [RFC2132] 32 Router Request 4 Router Solicitation Address [RFC2132] 33 Static Route N Static Routing Table [RFC2132] 34 Trailers 1 Trailer Encapsulation [RFC2132] 35 ARP Timeout 4 ARP Cache Timeout [RFC2132] 36 Ethernet 1 Ethernet Encapsulation [RFC2132] 37 Default TCP TTL 1 Default TCP Time to Live [RFC2132] 38 Keepalive Time 4 TCP Keepalive Interval [RFC2132] 39 Keepalive Data 1 TCP Keepalive Garbage [RFC2132] 40 NIS Domain N NIS Domain Name [RFC2132] 41 NIS Servers N NIS Server Addresses [RFC2132] 42 NTP Servers N NTP Server Addresses [RFC2132] 43 Vendor Specific N Vendor Specific Information [RFC2132] 44 NETBIOS Name Srv N NETBIOS Name Servers [RFC2132] 45 NETBIOS Dist Srv N NETBIOS Datagram Distribution [RFC2132] 46 NETBIOS Node Type 1 NETBIOS Node Type [RFC2132] 47 NETBIOS Scope N NETBIOS Scope [RFC2132] 48 X Window Font N X Window Font Server [RFC2132] 49 X Window Manager N X Window Display Manager [RFC2132] 50 Address Request 4 Requested IP Address [RFC2132] 51 Address Time 4 IP Address Lease Time [RFC2132] 52 Overload 1 Overload "sname" or "file" [RFC2132] 53 DHCP Msg Type 1 DHCP Message Type [RFC2132] 54 DHCP Server Id 4 DHCP Server Identification [RFC2132] 55 Parameter List N Parameter Request List [RFC2132] 56 DHCP Message N DHCP Error Message [RFC2132] 57 DHCP Max Msg Size 2 DHCP Maximum Message Size [RFC2132] 58 Renewal Time 4 DHCP Renewal (T1) Time [RFC2132] 59 Rebinding Time 4 DHCP Rebinding (T2) Time [RFC2132] 60 Class Id N Class Identifier [RFC2132] 61 Client Id N Client Identifier [RFC2132] 62 NetWare/IP Domain N NetWare/IP Domain Name [RFC2242] 63 NetWare/IP Option N NetWare/IP sub Options [RFC2242] 64 NIS-Domain-Name N NIS+ v3 Client Domain Name [RFC2132] 65 NIS-Server-Addr N NIS+ v3 Server Addresses [RFC2132] 66 Server-Name N TFTP Server Name [RFC2132] 67 Bootfile-Name N Boot File Name [RFC2132] 68 Home-Agent-Addrs N Home Agent Addresses [RFC2132] 69 SMTP-Server N Simple Mail Server Addresses [RFC2132] 70 POP3-Server N Post Office Server Addresses [RFC2132] 71 NNTP-Server N Network News Server Addresses [RFC2132] 72 WWW-Server N WWW Server Addresses [RFC2132] 73 Finger-Server N Finger Server Addresses [RFC2132] 74 IRC-Server N Chat Server Addresses [RFC2132] 75 StreetTalk-Server N StreetTalk Server Addresses [RFC2132] 76 STDA-Server N ST Directory Assist. Addresses [RFC2132] 77 User-Class N User Class Information [RFC3004] 78 Directory Agent N directory agent information [RFC2610] 79 Service Scope N service location agent scope [RFC2610] 80 Rapid Commit 0 Rapid Commit [RFC4039] 81 Client FQDN N Fully Qualified Domain Name [RFC4702] 82 Relay Agent Information N Relay Agent Information [RFC3046] 83 iSNS N Internet Storage Name Service [RFC4174] 84 REMOVED/Unassigned [RFC3679] 85 NDS Servers N Novell Directory Services [RFC2241] 86 NDS Tree Name N Novell Directory Services [RFC2241] 87 NDS Context N Novell Directory Services [RFC2241] 88 BCMCS Controller Domain Name list [RFC4280] 89 BCMCS Controller IPv4 address option [RFC4280] 90 Authentication N Authentication [RFC3118] 91 client-last-transaction-time option [RFC4388] 92 associated-ip option [RFC4388] 93 Client System N Client System Architecture [RFC4578] 94 Client NDI N Client Network Device Interface [RFC4578] 95 LDAP N Lightweight Directory Access Protocol [RFC3679] 96 REMOVED/Unassigned [RFC3679] 97 UUID/GUID N UUID/GUID-based Client Identifier [RFC4578] 98 User-Auth N Open Group's User Authentication [RFC2485] 99 GEOCONF_CIVIC [RFC4776] 100 PCode N IEEE 1003.1 TZ String [RFC4833] 101 TCode N Reference to the TZ Database [RFC4833] 102-107 REMOVED/Unassigned [RFC3679] 108 REMOVED/Unassigned [RFC3679] 109 Unassigned [RFC3679] 110 REMOVED/Unassigned [RFC3679] 111 Unassigned [RFC3679] 112 Netinfo Address N NetInfo Parent Server Address [RFC3679] 113 Netinfo Tag N NetInfo Parent Server Tag [RFC3679] 114 URL N URL [RFC3679] 115 REMOVED/Unassigned [RFC3679] 116 Auto-Config N DHCP Auto-Configuration [RFC2563] 117 Name Service Search N Name Service Search [RFC2937] 118 Subnet Selection Option 4 Subnet Selection Option [RFC3011] 119 Domain Search N DNS domain search list [RFC3397] 120 SIP Servers DHCP Option N SIP Servers DHCP Option [RFC3361] 121 Classless Static Route Option N Classless Static Route Option [RFC3442] 122 CCC N CableLabs Client Configuration [RFC3495] 123 GeoConf Option 16 GeoConf Option [RFC3825] 124 V-I Vendor Class Vendor-Identifying Vendor Class [RFC3925] 125 V-I Vendor-Specific Information Vendor-Identifying Vendor-Specific Information [RFC3925] 126 Removed/Unassigned [RFC3679] 127 Removed/Unassigned [RFC3679] 128 PXE - undefined (vendor specific) [RFC4578] 128 Etherboot signature. 6 bytes: E4:45:74:68:00:00 128 DOCSIS "full security" server IP address 128 TFTP Server IP address (for IP Phone software load) 129 PXE - undefined (vendor specific) [RFC4578] 129 Kernel options. Variable length string 129 Call Server IP address 130 PXE - undefined (vendor specific) [RFC4578] 130 Ethernet interface. Variable length string. 130 Discrimination string (to identify vendor) 131 PXE - undefined (vendor specific) [RFC4578] 131 Remote statistics server IP address 132 PXE - undefined (vendor specific) [RFC4578] 132 IEEE 802.1Q VLAN ID 133 PXE - undefined (vendor specific) [RFC4578] 133 IEEE 802.1D/p Layer 2 Priority 134 PXE - undefined (vendor specific) [RFC4578] 134 Diffserv Code Point (DSCP) for VoIP signalling and media streams 135 PXE - undefined (vendor specific) [RFC4578] 135 HTTP Proxy for phone-specific applications 136 OPTION_PANA_AGENT [RFC5192] 137 OPTION_V4_LOST [RFC5223] 138 OPTION_CAPWAP_AC_V4 N CAPWAP Access Controller addresses [RFC5417] 139 OPTION-IPv4_Address-MoS N a series of suboptions [RFC5678] 140 OPTION-IPv4_FQDN-MoS N a series of suboptions [RFC5678] 141-149 Unassigned [RFC3942] 150 TFTP server address (Tentatively Assigned - 2005-06-23) 150 Etherboot 150 GRUB configuration path name 151-174 Unassigned [RFC3942] 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 [RFC3942] 208 PXELINUX Magic 4 magic string = F1:00:74:7E [RFC5071] Deprecated 209 Configuration File N Configuration file [RFC5071] 210 Path Prefix N Path Prefix Option [RFC5071] 211 Reboot Time 4 Reboot Time [RFC5071] 212-219 Unassigned 220 Subnet Allocation Option (Tentatively Assigned - 2005-06-23) 221 Virtual Subnet Selection Option (Tentatively Assigned - 2005-06-23) 222-223 Unassigned [RFC3942] 224-254 Reserved (Private Use) 255 End 0 None [RFC2132] Sub-registry: DHCP Message Type 53 Values Reference: [RFC2939] Registration Procedures: IETF Consensus Registry: Value Message Type Reference ----- ---------------------- --------- 1 DHCPDISCOVER [RFC2132] 2 DHCPOFFER [RFC2132] 3 DHCPREQUEST [RFC2132] 4 DHCPDECLINE [RFC2132] 5 DHCPACK [RFC2132] 6 DHCPNAK [RFC2132] 7 DHCPRELEASE [RFC2132] 8 DHCPINFORM [RFC2132] 9 DHCPFORCERENEW [RFC3203] 10 DHCPLEASEQUERY [RFC4388] 11 DHCPLEASEUNASSIGNED [RFC4388] 12 DHCPLEASEUNKNOWN [RFC4388] 13 DHCPLEASEACTIVE [RFC4388] Sub-registry: NetWare/IP Option Type 63 Sub-Option Codes Reference: [RFC2242] Registration Procedures: Not defined Registry: Value Message Type Reference ------ ---------------------------- --------- 1 NWIP_DOES_NOT_EXIST [RFC2242] 2 NWIP_EXIST_IN_OPTIONS_AREA [RFC2242] 3 NWIP_EXIST_IN_SNAME_FILE [RFC2242] 4 NWIP_EXIST_BUT_TOO_BIG [RFC2242] 5 NSQ_BROADCAST [RFC2242] 6 PREFERRED_DSS [RFC2242] 7 NEAREST_NWIP_SERVER [RFC2242] 8 AUTORETRIES [RFC2242] 9 AUTORETRY_SECS [RFC2242] 10 NWIP_1_1 [RFC2242] 11 PRIMARY_DSS [RFC2242] 12-255 Unassigned Sub-registry: DHCP Cablelabs Client Configuration Option Type 122 Sub-Option Codes Reference: [RFC3495] Registration Procedures: IETF Consensus Registry: Code Sub-Option Description Reference ------ ------------------------------------------ --------- 1 TSP's Primary DHCP Server Address [RFC3495] 2 TSP's Secondary DHCP Server Address [RFC3495] 3 TSP's Provisioning Server Address [RFC3495] 4 TSP's AS-REQ/AS-REP Backoff and Retry [RFC3495] 5 TSP's AP-REQ/AP-REP Backoff and Retry [RFC3495] 6 TSP's Kerberos Realm Name [RFC3495] 7 TSP's Ticket Granting Server Utilization [RFC3495] 8 TSP's Provisioning Timer Value [RFC3495] 9 TSP's Security Ticket Control [RFC3594] 10 KDC Server Address [RFC3634] 11-255 Unassigned Sub-registry: GeoConf Option fields (Value 123) - The Altitude (AT) field Reference: [RFC3825] Registration Procedures: Standards Action Value Altitude Field Description Reference ----- ---------------------------------------------- --------- 1 Meters - in 2s-complement fixed-point 22-bit [RFC3825] integer part with 8-bit fraction 2 Floors - in 2s-complement fixed-point 22-bit [RFC3825] integer part with 8-bit fraction Sub-registry: GeoConf Option fields (Value 123) - The Datum field Reference: [RFC3825] Registration Procedures: Standards Action Value Datum Field Description Reference ----- ---------------------------------------------- --------- 1 WGS 84 - (Geographical 3D) [RFC3825] World Geodesic System 1984, CRS Code 4327, Prime Meridian Name: Greenwich 2 NAD83 - North American Datum 1983, [RFC3825] 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) 3 NAD83 - North American Datum 1983, [RFC3825] 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 Registry Name: CableLabs Client Configuration Option Ticket Control Mask Bit Definitions Reference: [RFC3594] Registration Procedures: IETF Consensus Registry: Bit Description Reference ------ -------------------------------------- --------- 0 the PacketCable Provisioning Server [RFC3594] used by the CCD. 1 the group of all PacketCable Call [RFC3594] Management Servers used by the CCD. 2-15 Reserved and MUST be set to 0. Registry Name: DHCP Relay Agent Sub-Option Codes Reference: [RFC3046] Registration Procedures: IETF Consensus Registry: Code Sub-Option Description Reference ------ --------------------------------------- --------- 1 Agent Circuit ID Sub-option [RFC3046] 2 Agent Remote ID Sub-option [RFC3046] 3 Sub-option 3 is reserved and should [Droms] not be assigned at this time; proprietary and incompatible usages of this sub-option value have been seen limited deployment. 4 DOCSIS Device Class Suboption [RFC3256] 5 Link selection Sub-option [RFC3527] 6 Subscriber-ID Suboption [RFC3993] 7 RADIUS Attributes Sub-option [RFC4014] 8 Authentication Suboption [RFC4030] 9 Vendor-Specific Information Suboption [RFC4243] 10 Relay Agent Flags [RFC5010] 11 Server Identifier Override Suboption [RFC5107] Registry Name: Authentication Suboption (value 8) - Algorithm identifier values Reference: [RFC4030] Registration Procedures: IETF Consensus Value Algorithm Reference ----- --------------------------------- --------- 0 Reserved [RFC4030] 1 HMAC-SHA1 keyed hash [RFC4030] Registry Name: Authentication Suboption (value 8) - Replay Detection Method (RDM) identifier values Reference: [RFC4030] Registration Procedures: IETF Consensus Value Algorithm Reference ----- ------------------------------------------------- --------- 0 Reserved [RFC4030] 1 use of a monotonically increasing counter value [RFC4030] Registry Name: IEEE 802.21 Service Type (MoS DHCPv4 Address and FQDN Sub-Options) Reference: [RFC5678] Registration Procedures: Standards Action Value Name Reference ------- ----------------------------------------------- --------- 0 Reserved [RFC5678] 1 IS [RFC5678] 2 CS [RFC5678] 3 ES [RFC5678] 4-254 Unassigned 255 Reserved [RFC5678] References ---------- [RFC951] Croft, B., and J. Gilmore, "BOOTSTRAP Protocol (BOOTP)", RFC-951, Stanford and SUN Microsytems, September 1985. [RFC2131] Droms, R., "Dynamic Host Configuration Protocol", Bucknell University, March 1997. [RFC2132] Alexander, S., and R. Droms, "DHCP Options and BOOTP Vendor Extensions", Silicon Graphics, Inc., Bucknell University, March 1997. [RFC2241] D. Provan, "DHCP Options for Novell Directory Services", RFC 2241, November 1997. [RFC2242] R. Droms and K. Fong, "NetWare/IP Domain Name and Information", RFC 2242, November 1997. [RFC2485] S. Drach, "DHCP Option for The Open Group's User Authentication Protocol", RFC 2485, January 1999. [RFC2489] Droms, R., "Procedure for Defining New DHCP Options", BCP 29, RFC 2489, January 1999. [RFC2563] R. Troll, "DHCP Option to Disable Stateless Auto-Configuration in IPv4 Clients, RFC 2563, May 1999. [RFC2610] C. Perkins and E. Guttman, "DHCP Options for Service Location Protocol", RFC 2610, June 1999. [RFC2937] C. Smith, "The Name Service Search Option for DHCP", RFC 2937, September 2000. [RFC2939] R. Droms, "Procedures and IANA Guidelines for Definition of New DHCP Options and Message Types", RFC 2939, September 2000. [RFC3004] G. Stump, R. Droms, Y. Gu, R. Vyaghrapuri, A. Demirtjis, B. Beser, and J. Privat, "The User Class Option for DHCP", RFC 3004, November 2000. [RFC3011] G. Waters, "The IPv4 Subnet Selection Option for DHCP", RFC 3011, November 2000. [RFC3046] M. Patrick, "DHCP Relay Agent Information Option", RFC 3046, January 2001. [RFC3118] R. Droms and W. Arbaugh, "Authentication for DHCP Messages", RFC 3118, June 2001. [RFC3203] Y. T'Jones, C. Hublet, and P. De Schrijver, "DHCP Reonfigure Extension", RFC 3203, December 2001. [RFC3256] D. Jones and R. Woundy, "The DOCSIS Device Class DHCP Relay Agent Information Sub-option", RFC 3256, April 2002. [RFC3361] H. Schulzrinne, "DHCPv4 Option for SIP Servers", RFC 3361, August 2002. [RFC3397] B. Aboba and S. Cheshire, "Dynamic Host Configuration Protocol (DHCP) Domain Search Option", RFC 3397, November 2002. [RFC3442] T. Lemon, S. Cheshire, and B. Volz, "The Classless Static Route Option for DHCPv4", RFC 3442, December 2002. [RFC3495] B. Beser and P. Duffy, "DHCP Option for CableLabs Client Configuration", RFC 3495, March 2003. [RFC3527] K. Kinnear, M. Stapp, R. Johnson, and J. Kumarasamy, "Link Selection sub-option for the Relay Agent Information Option for DHCPv4", RFC 3527, April 2003. [RFC3594] P. Duffy, "PacketCable Security Ticket Control Sub-option for the DHCP CableLabs Client Configuration Option", RFC 3594, September 2003. [RFC3679] R. Droms, "Unused DHCP Option Codes", RFC 3679, January 2004. [RFC3634] K. Luehrs, R. Woundy, J. Bevilacqua, N. Davoust, "Key Distribution Center (KDC) Server Address Sub-option for the Dynamic Host Configuration Protocol (DHCP) CableLabs Client Configuration (CCC) Option", RFC3634, December 2003. [RFC3825] J. Polk, J. Schnizlein, and M. Linsner, "Dynamic Host Configuration Protocol Option for Coordinate-based Location Configuration Information", RFC 3825, July 2004. [RFC3925] J. Littlefield, "Vendor-Identifying Vendor Options for DHCPv4", RFC 3925, October 2004. [RFC3942] B. Volz, "Reclassifying DHCPv4 Options", RFC 3942, November 2004. [RFC3993] R. Johnson, T. Palaniappan, and M. Stapp, "Subscriber-ID Suboption for the DHCP Relay Agent Option", RFC 3993, March 2005. [RFC4014] R. Droms and J. Schnizlein, "RADIUS Attributes Sub-option for the DHCP Relay Agent Information Option", RFC 4014, February 2005. [RFC4030] M. Stapp and T. Lemon, "The Authentication Suboption for the DHCP Relay Agent Option", RFC 4030, March 2005. [RFC4039] S. Park, P. Kim, and B. Volz, "Rapid Commit Option for DHCPv4", RFC 4039, March 2005. [RFC4174] C. Monia, J. Tseng, and K. Gibbons, "The IPv4 DHCP Option for the Internet Storage Name Service", RFC 4174, September 2005. [RFC4243] M. Stapp, R. Johnson, and T. Palaniappan, "Vendor-Specific Information Suboption for the DHCP Relay Agent Option", RFC 4243, December 2005. [RFC4280] K. Chowdhury, P. Yegani and L. Madour, "DHCP Options for Broadcast and Multicast Control Servers", RFC 4280, November 2005. [RFC4388] R. Woundy and Kim Kinnear, "DHCP Lease Query", RFC 4388, February 2006. [RFC4578] M. Johnston and S. Venaas, "DHCP Options for the Intel Preboot eXecution Environment (PXE)", RFC 4578, November 2006. [RFC4702] M. Stapp, B. Volz and Y. Rekhter, "The DHCP Client FQDN Option", RFC 4702, October 2006. [RFC4776] H. Schulzrinne, "Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Option for Civic Addresses Configuration Information", RFC 4776, November 2006. [RFC4833] E. Lear, P. Eggert, "A Timezone Option for DHCP", RFC 4833, April 2007. [RFC5010] K. Kinnear, M. Normoyle and M. Stapp, "DHCPv4 Relay Agent Flags Suboption", RFC 5010, September 2007. [RFC5071] D. Hankins, "Dynamic Host Configuration Protocol Options Used by PXELINUX", RFC 5071, December 2007. [RFC5107] R. Johnson, J. Jumarasamy, K. Kinnear, M. Stapp, "DHCP Server Identifier Override Suboption", RFC 5107, February 2008. [RFC5192] L. Morand, A. Yegin, S. Kumar, S. Madanapalli, "DHCP options for PANA Authentication Agents", RFC 5192, May 2008. [RFC5223] H. Schulzrinne, J. Polk, H. Tschofenig, "A Dynamic Host Configuration Protocol (DHCP) based Location-to-Service Translation Protocol (LoST) Discovery Procedure", RFC 5223, August 2008. [RFC5417] P. Calhoun, "CAPWAP Access Controller DHCP Option", RFC 5417, March 2009. [RFC5678] G. Bajko, S. Das, "Dynamic Host Configuration Protocol (DHCPv4 and DHCPv6) Options for IEEE 802.21 Mobility Services (MoS) Discovery", RFC 5678, December 2009. People ------ [Droms] Ralph Droms, , January 2001. []