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RADIUS Attribute Type Extension IETF 69 PowerPoint Presentation
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RADIUS Attribute Type Extension IETF 69

RADIUS Attribute Type Extension IETF 69

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RADIUS Attribute Type Extension IETF 69

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  1. RADIUS Attribute Type ExtensionIETF 69 Y. Li Lior G. Zorn

  2. Goals • Primary Goal • define a mechanism to extend base RADIUS attribute type set • backward compatibility with RADIUS • Diameter compatibility • Secondary Goals • big attributes • attribute grouping

  3. Type Extension Mechanism • Allocate a vendor code for the IETF • 0 specified • Use of one vendor code doubles the standard attribute space • If we run out, request another vendor code • Small sub-attributes can be packed into one extended attribute • Like RFC 2865 VSAs

  4. Large Attribute Support • Uses Fragmentation flag in header • One bit • Attributes > 246 octets in length fragment into multiple extended attributes • On reception, attributes w/same type & ’F’ flag set concatenated in order • Allows multiple big attributes of same type to be carried in one message

  5. Attribute grouping • Uses Tag field in header • Derived from RFC 2868 scheme • Tag MUST be present • 126 distinct attribute groups possible in a message • 0x00 means no tag • 0x7F reserved • Nested groups not supported

  6. Discussion?