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ATM Network Access Control for Quality Service Provision

This innovative solution by Sylvain Gombault, Gwenn Gueguen, Maryline Laurent, and Olivier Paul from ENST de Bretagne and France Telecom enhances ATM network performance by providing advanced access control and quality of service preservation at high speeds. The system includes a manager, signalling filter, and cell-level filter for seamless integration and efficient management. With features such as pre-computed cell filtering, dynamic configuration adaptation, and easy equipment integration, it ensures optimal service delivery and control. See complete test results and capabilities for ISP TCP/IP level access control in the comprehensive overview.

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ATM Network Access Control for Quality Service Provision

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  1. CARATAccess Control and Quality of service in ATM Networks Sylvain Gombault Gwenn Gueguen Maryline Laurent Olivier Paul ENST de Bretagne CELAR France Telecom - RD

  2. CARAT - Goals • Filtering at the ATM and TCP/IP levels. • High Speed. • 622 Mb/s on cells. • QoS preservation. • Delay on the ATM cells filtering can be pre-computed. • Easy to manage.

  3. Located between a public and a private network. Made of 3 modules: • Manager. • Signalling filter. • Cell-level filter. Overview • Can be easily integrated to the existing equipment. • Modules are configured through a single language.

  4. Translates the access control policy expressed by the security officer into a set of access control commands that can be used by the signalling filter. by the cell filter. The manager

  5. Based on a SUN ATM signalling protocol stack. Modifications on Q93B module. Signalling messages parsing module. Filter. Signalling messages construction module. Address masquerading. The signalling filter

  6. IFT/CNET NICs 622 Mb/s mono-directional. Analyse of the first AAL5 frame cell Possible action: commutation Reject : Trash VC. Accept : Leave VC unchanged. Deterministic cell analysis time. On the fly configuration modification. RPC Demon IFT Driver • IFT Driver • Remote configuration. • Handles several managers. • Configuration library. Cell-level filter Solaris PC Filtering memory Filtering memory ATM Cells Extraction ATM Cells Extraction

  7. Conclusions • Good performance (throughput,delay) • Patented Cell Analysis scheme. • Dynamic Configuration Adaptation. • Test results complete ISP TCP/IP level ACP (400 rules): • 70% memory was used (1.4 M/ 2M). • 1.7s maximum delay. • ATM & TCP/IP Access Control Capabilities. • Native ATM Applications Control. • “Plug-in” controller. • Easy Adaptation to the Existing Equipment. • New functions can be easily integrated. • Easy to manage

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