A custom vendor is used to define a vendor not stored in a RADIUS dictionary that is part of the CMP database. This dictionary includes vendor IDs and text descriptions, and includes standard vendor-specific attributes (VSAs). You can define custom vendors, define VSAs for them, and add them to the dictionary.
Custom VSAs are typically used in a RADIUS Change of Authorization (CoA) message. You can create policy conditions to evaluate the presence of VSAs in RADIUS messages, and to include custom VSAs in RADIUS response messages.
For information on how to create a VSA, see Managing Custom VSAs. For information on how to use a VSA in a RADIUS CoA message, see Managing RADIUS CoA Templates.