Avi Lior, Bridgewater Systems

1
RADIUS Bandwidth Capability
draft-lior-radius-bandwidth-capability-00.txt

• Avi Lior, Bridgewater Systems
• Farid Adrangi, Intel
• Paul Congdon, ProCurve Networking Business
• Chuck Black, ProCurve Networking Business
• Farooq Bari, ATT

2
How did we get here?

• Torrid history of the draft
• Too simple we need a tighter way express
  bandwidth Its to stringent when error occur.
• Generic bandwidth no lets keep it simple
  otherwise it will never make it.
• So we listened and this draft represents the
  latest take.
• It has a simple bandwidth attribute,
• It has a reasonable tightness

3
Attributes

• Egress, Ingress Bandwidth
• data rate that the authorized user session should
  be allocated for traffic flowing from/to the
  user's device within the access network.
• Bandwidth Profile Id.
• A reference to bandwidth profile for a user.
  Mutually provisioned between the parties.
• Not scalable
• Appriori configuration does not roam well.
• But it does allow for NAS specific expression of
  Bandwidth configuration to be represented by a
  single label.
• The RADIUS server can either use Egress, Ingress
  Bandwidth or Profile ID. Not both!

4
Protocol Details

• Bandwidth Advertisement (Optional)
• NAS may advertise available bandwidth.
• Bandwidth Selection
• The home network specifies what bandwidth is to
  be applied to the user session.
• Bandwidth parameters in the Selection SHOULD NOT
  exceed the corresponding bandwidth parameters in
  the Advertisement.
• Bandwidth Confirmation
• Actual allocated bandwidth MUST be reported in
  the accounting stream.

5
Static and Dynamic Allocation

• Both static allocation (during initial
  authorization) is supported and
• Dynamic authorization (Turbo boost) is supported.
• Reporting of change of bandwidth
• Start/Stop or Interim messages.
• Selectable by the NAS.
• THIS IS AN ISSUE SHOULD THE NAS control how it
  reports change in authorizations? If not we need
  an attribute in Access Accept to tell it what the
  home network wants.

6
Next steps

• WG document?