What are the relationships between UNRs and address pools after PPPoE
users go online from an ME60?
After a PPPoE user goes online, a 32-bit user route is generated
regardless of whether the obtained IP address exists on the ME60 (that is, the
address pool is not on the local or IP routes are delivered by the RADIUS
server). Such a 32-bit route is destined for the BAS interface used for user