Protocol extensions for DS-TE

• IGP extensions for DS-TE:

  Advertise “unreserved TE bandwidth” (at each pre-emption level) for each Class-Type
  
  Class-Type: a group of Diffserv classes sharing the same bandwidth constraint (e.g. AF1x and AF2x)

• RSVP extensions for DS-TE:

  Also signal the Class-Type
  
  Perform Class-Type-aware admission control

• Constraint-based routing for DS-TE:

  Same algorithm but compute path over links with sufficient “unreserved bandwidth” for the relevant class-type
  

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