Differentiated Services Field Codepoints (DSCP)

Last Updated

2018-06-14

Note

The DSCP field within the DS field is capable of conveying 64 distinct
codepoints.  The codepoint space is divided into three pools for the
purpose of codepoint assignment and management: a pool of 32
codepoints (Pool 1) to be assigned by Standards Action as defined in
[RFC2434], a pool of 16 codepoints (Pool 2) to be reserved for
experimental or Local Use (EXP/LU) as defined in [RFC2434], and a pool
of 16 codepoints (Pool 3) which are initially available for experimental
or local use, but which should be preferentially utilized for
standardized assignments if Pool 1 is ever exhausted. Pool 3 codepoints
are now utilized for standardized assignments and are no longer available
for experimental or local use, as specified by [RFC-ietf-tsvwg-iana-dscp-registry-08].  
The pools are defined in the following table (where 'x' refers to either '0' or '1').
  

Available Formats

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Registries included below

• Differentiated Services Field Codepoints
  • Pool 1 Codepoints
  • Pool 3 Codepoints
• ECN Field (Bits 6-7)

Differentiated Services Field Codepoints

Reference

[RFC2474][RFC3260, Section 4]

Available Formats

CSV

ECN Field (Bits 6-7)

Registration Procedure(s)

RFC Required

Reference

[RFC3168]

Note

The registrations are identical for IPv4 and IPv6.
    

Available Formats

CSV