Aggregation of DiffServ Service Classes

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Aggregation of DiffServ Service Classes

• draft-chan-tsvwg-diffserv-class-aggr-02.txt

Kwok Ho Chan (khchan_at_nortel.com) Jozef Babiarz
(babiarz_at_nortel.com) Fred Baker (fred_at_cisco.com)
TSVWG, 63rd IETF, August 3, 2005
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Changes from Previous Version

• Improved grammar and format
• Added a table describing Treatment Aggregate
  Behavior Summary
• Added sections on using MPLS for Treatment
  Aggregates
• Using EXP field of MPLS, hence E-LSP (EXP
  Inferred PHB Scheduled Class Label Switched Path)
  as in RFC 3270 (MPLS Support of DiffServ)

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Major Points

• Treatment Aggregates are grouped based on
  treatment behavior required of the network by the
  application/network-user.
• The DiffServ Code Point should be preserved
  during aggregation.
• Traffic Conditioning or Admission Control is
  necessary and should be performed per Service
  Class before aggregation.

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Using MPLS for Treatment Aggregates
Treatment Aggregate DSCP Name MPLS EXP
Network Control CS6 110
Real Time EF, CS5, AF41, AF42, AF43, CS4, CS3 100
Assured Elastic CS2, AF31, AF21, AF11 AF32, AF22, AF12, AF33, AF23, AF13 010 011
Elastic Default/CS0 CS1 000 001
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Next Steps

• The co-authors believe this document is close to
  its completion.
• Please review and provide comments.
• Requesting to have this document be a TSVWG Work
  Group document. And working toward Working Group
  Last Call within two IETF meetings.