• Vendor-ID • Vendor-Type • Vendor-Length • Vendor-Data The figure below shows the packet format for a VSA encapsulated “behind” attribute 26. Figure 2: VSA Encapsulated Behind Attribute 26 It is up to the vendor to specify the format of their VSA. The Attribute-Specific field (also known as Vendor-Data) is dependent on the vendor's definition of that attribute. Note The table below describes significant fields listed in the Vendor-Specific RADIUS IETF Attributes table (second table below), which lists supported vendor-specific RADIUS attributes (IETF attribute 26). Table 5: Vendor-Specific Attributes Table Field Descriptions Table 6:
Vendor-Specific RADIUS IETF Attributes Configuring RADIUS Vendor-Specific RADIUS Attributes Field Description Number All attributes listed in the following table are extensions of IETF attribute 26. Vendor-Specific Command Codes A defined code used to identify a particular vendor. Code 9 defines Cisco VSAs, 311 defines Microsoft VSAs, and 529 defines Ascend VSAs. Sub-Type Number The attribute ID number. This number is much like the ID numbers of IETF attributes, except it is a “second layer” ID number encapsulated behind attribute 26. Attribute The ASCII string name of the attribute. Description Description of the attribute.
Number Vendor-Specific Company Code Sub-Type Number Attribute Description MS-CHAP Attributes Configuring RADIUS 14