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Supported Platforms
Subscriber Access Operation Flow Using DHCP Relay
The subscriber access feature requires that a subscriber (for example, a DHCP client) send a discover message to the router interface to initialize dynamic configuration of that interface.
Figure 1 shows the flow of operations that occurs when the router is using DHCP relay to enable access for a subscriber.
Figure 1: Subscriber Access Operation Flow
The following general sequence occurs during access configuration for a DHCP client:
- The client issues a DHCP discover message.
- The router issues an authorization request to the RADIUS server.
- The RADIUS server issues an authorization response to the router.
- The router passes the DHCP discover message through to the DHCP server.
- The DHCP server issues an IP address for the client.
- The router DHCP component sends an acknowledgement back to the client.
The subscriber now has access to the network and the authorized service.
