Editing Dynamic Host Configuration Protocol (section)

===Other extensions===
{| class="wikitable sortable"
|+ Documented DHCP options
|-
! Code !! Name !! Length !! RFC
|-
| 77 || User Class || Minimum of 2 octets || {{Sum RFC|3004|plain=yes|ref=yes}}
|-
| 82 || [[#Relay agent information sub-options|Relay agent information]] || Minimum of 2 octets || {{Sum RFC|3046|plain=yes|ref=yes}}
|-
| 85 || [[Novell Directory Service]] (NDS) servers || Minimum of 4 octets, multiple of 4 octets || {{Sum RFC|2241|plain=yes}}{{Ref RFC|2241|rsection=2}}
|-
| 86 || NDS tree name || Variable || {{Sum RFC|2241|plain=yes}}{{Ref RFC|2241|rsection=3}}
|-
| 87 || NDS context || Variable || {{Sum RFC|2241|plain=yes}}{{Ref RFC|2241|rsection=4}}
|-
| 100 || [[Time zone]], POSIX style || Variable || {{Sum RFC|4833|plain=yes|ref=yes}}
|-
| 101 || [[Time zone]], [[tz database]] style || Variable || {{Sum RFC|4833|plain=yes}}
|-
| 114 || DHCP Captive-Portal || Variable || {{Sum RFC|8910|plain=yes|ref=yes}}
|-
| 119 || [[Search domain|Domain search]] || Variable || {{Sum RFC|3397|plain=yes|ref=yes}}
|-
| 121 || Classless static route || Variable || {{Sum RFC|3442|plain=yes|ref=yes}}
|-
| 209 || Configuration File || Variable || {{Sum RFC|5071|plain=yes|ref=yes}}
|-
| 210 || Path Prefix || Variable || {{Sum RFC|5071|plain=yes}}
|-
| 211 || Reboot Time || Variable || {{Sum RFC|5071|plain=yes}}
|}

====Relay agent information sub-options====
The relay agent information option (option 82) specifies container for attaching sub-options to DHCP requests transmitted between a DHCP relay and a DHCP server.<ref name="ietf_spec_dhcp82">{{cite journal|last1=Patrick|first1=Michael|title=DHCP Relay Agent Information Option|url=https://tools.ietf.org/html/rfc3046|website=IETF Documents|publisher=[[IETF]]|access-date=22 July 2017|doi=10.17487/RFC3046|date=January 2001|doi-access=|url-access=subscription}}</ref>

{| class="wikitable sortable"
|+ Relay agent sub-options
|-
! Code !! Name !! Length !! RFC
|-
| 1 || Agent Circuit ID || Minimum of 1 octet || {{Sum RFC|3046|plain=yes|ref=yes}}
|-
| 2 || Agent Remote ID || Minimum of 1 octet || {{Sum RFC|3046|plain=yes}}
|-
| 4 || Data-Over-Cable Service Interface Specifications (DOCSIS) device class || 4 octets || {{Sum RFC|3256|plain=yes|ref=yes}}
|}