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CARAT Access Control and Quality of service in ATM Networks

CARAT Access Control and Quality of service in ATM Networks. Sylvain Gombault Gwenn Gueguen Maryline Laurent Olivier Paul ENST de Bretagne CELAR France Telecom - RD. CARAT - Goals. Filtering at the ATM and TCP/IP levels. High Speed. 622 Mb/s on cells. QoS preservation.

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CARAT Access Control and Quality of service in ATM Networks

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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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