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UniK, Kjeller

DSLForum

DSL forum

start with their description on why to manage a thin gateway. Comparing the four main technologies used today (in {{unik:dsl-basics.pdf}})

  - Integrated Routing and Bridgin (IRB/RFC 1483): Security (IP-hacking)
  - Routed Bridge Encapsulation (RBE): the packets are not bridged but instead routed
  - Point-to-Point Protocol over ATM (PPPoA): (Radius-)Authentication per user
  - Point-to-Point Protocol over Ethernet (PPPoE):  on each PC on the subscriber side. The client initiates a PPP session by encapsulating PPP frames into a MAC frame and then bridging the frame (over ATM/DSL) to the gateway router (NRP)

Technical Report, DSL Forum, TR-059 , {{unik:tr-059.pdf}}\\ DSL Evolution - Architecture Requirements for the Support of QoSEnabled IP Services September 2003: \\ The prevalent existing service model, where subscriber connections are delivered in a best effort fashion over end-to-end ATM PVCs, will continue to exist. However, this service model cannot support many of the improvements and benefits desired, including IP QoS, bandwidth on demand, and utilization of newer, alternative transport options. This architecture supports the following service provider interconnection models, which are described WT-080:

  • Subscriber access using PPPoE aggregated into L2TP tunnels delivered to Network Service Providers.
  • Subscriber access using PPPoE or IP over Ethernet aggregated into VPNs delivered to Network Service

Providers.

  • Subscriber access using PPPoE or IP over Ethernet aggregated into a common, public, QoS-enabled IP network and delivered to Application Service Providers.

The DSL architecture and requirements put forward by this document enable the following product and service enhancements, which are described in WT-080.

  • Bandwidth on Demand
  • QoS, including QoS on Demand
  • Many-to-Many Access
  • Content Distribution
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Page last modified on May 31, 2005, at 11:33 PM EST