DS FieldRFC 2475

• DS field is used to select PHB and it replaces:

  • IPv4 ToS
  • IPv6 Traffic Class

• DSCP: Diffserv Code Point = 6 bits

  • “xxxxxx” notation

• CU: Currently Unused = 2 bits

• 3-bit Class Selector codepoints backward compatible with IP precedence

  • “xxx000” notation

DSCP

CU

Previous slide

Next slide

Back to first slide

View graphic version