LUDB
Local User Database configured within the 7450 ESS and 7750 SR.
IP Address Assignment with DHCP Relay
IP address assignment request (DHCP or IPCP) from the host is relayed to an internal or external DHCP server. A gi-address must be present in this relayed request while the pool name is optional. The internal DHCP server may select the IP address from is local pool based on the gi-address or based on the pool-name present in the request. The IP address selection method is configuration dependent. Third party DHCP servers may consider additional fields in IP address selection process (mac address, circuit-id, and so on).
IP Address Assignment with DHCP Proxy
A preconfigured IP address in LUDB or RADIUS server is handed out to the host using a DHCP proxy function. This proxy function responds natively using DHCP protocol to the IPoE host. Although PPPoE hosts are not utilizing DHCP protocol, the DHCP proxy functionality within the server is still needed for successful IP address delegation to PPPoE hosts.