How Dynamic Ip Addressing Works; Assigning Addresses - Bay Networks Baystream 7 Configuration And Troubleshooting Manual

8. The NAS sends a Mobile IP tunnel registration request to the RADIUS client.
9. The RADIUS client sends a Mobile IP tunnel registration reply to the RAS.
10. The tunnel is established. It exists until the connection terminates.

How Dynamic IP Addressing Works

Dial VPN implements dynamic IP address assignment using the BayStream Site
Manager and BaySecure Access Control (BSAC). Using Site Manager, the
BayStream administrator first enables dynamic addressing on the gateway.
The BSAC (RADIUS) administrator on the customer's network must enter one or
more IP address ranges to be used as a pool of assignable addresses. For each
remote user, the RADIUS administrator can enter either a specific IP address or
allow the assignment of an IP address from the pool. The administrator could, in
fact, set up a standard profile with "assign from pool" specified, and apply this
profile to many users at once.
The Current Users display identifies the active users and their assigned IP
addresses, so RADIUS administrators can tell which user has which address. In
addition, the administrator can release any assigned address that is no longer in
use by selecting that address and clicking Clear.
Note: Dynamic address assignment is not available for IPX.

Assigning Addresses

All available IP addresses are in a queue. The first in the queue is the first
assigned. Released addresses return to the end of the queue for reassignment.
RADIUS saves all current address assignments in a database to prevent duplicate
address assignments if the server fails.
The gateway is a client of the RADIUS server on the customer's network; that is,
it provides a service to the dial-in user, such as PPP or Telnet. The client is
responsible for passing user information to the designated RADIUS server. The
RADIUS server receives the request and returns a response to the client that it has
successfully received the request. The RADIUS accounting server can also act as
a client to other kinds of accounting servers.
115623B Rev. 00 BayStream Multiservice Software Version 7.2
Managing a Dial VPN Network
10-3