You can configure RADIUS authentication, accounting, and local address pools for a specific virtual router and then map a user domain to that virtual router.
The router keeps track of the mapping between domain names and virtual-routers. Use the aaa domain-map command to map a user domain to a virtual router.
![]() |
Note: This domain name is not the NT domain sometimes found on the Dialup Networking dialog box. |
When the router is configured to require authentication of a PPP user, the router checks for the appropriate user domain-name-to-virtual-router mapping. If it finds a match, the router sends a RADIUS authentication request to the RADIUS server configured for the specific virtual router.