Greetings, We are using Freeradius v2 to authenticate and give IP to a large group of mobiles, connected to us via gprs through 2 NAS randomicaly. We need this group of mobiles to get an IP address based on the NAS where they authenticate from and keep this IP always it connects from this same NAS again and other if it connects from the other NAS, the nearest possible of an static IP served by the Radius server via IPPOOL. We have a limitation because the gprs operator's demands the same login/password for all the mobiles. Today we use, based in what I read in this list and the documentation, the configuration: users: DEFAULT NAS-IP-Address == xxx.xxx.xxx.1, Pool-Name := "pool1" X-Ascend-Client-Assign-DNS = 1, X-Ascend-Client-Primary-DNS = xxx.xxx.xxx.4, X-Ascend-Client-Secondary-DNS = xxx.xxx.xxx.5, Service-Type = Framed-User, Simultaneous-Use := 10000, Framed-Protocol = PPP, Framed-MTU = 1500, Framed-Compression = Van-Jacobsen-TCP-IP, Fall-Through = Yes DEFAULT NAS-IP-Address == xxx.xxx.xxx.2, Pool-Name := "pool2" X-Ascend-Client-Assign-DNS = 1, X-Ascend-Client-Primary-DNS = xxx.xxx.xxx.4, X-Ascend-Client-Secondary-DNS = xxx.xxx.xxx.5, Service-Type = Framed-User, Simultaneous-Use := 10000, Framed-Protocol = PPP, Framed-MTU = 1500, Framed-Compression = Van-Jacobsen-TCP-IP, Fall-Through = Yes radiusd.conf (ippool): ippool pool1 { range-start = xxx.xxx.2.1 range-stop = xxx.xxx.3.254 netmask = 255.255.254.0 cache-size = 510 session-db = ${raddbdir}/db.ippool1 ip-index = ${raddbdir}/db.ipindex1 override = no maximum-timeout = 0 lease-duration = 86400 key = "%{NAS-IP-Address} %{Calling-Station-Id}" } ippool pool2 { range-start = xxx.xxx.0.1 range-stop = xxx.xxx.1.254 netmask = 255.255.254.0 cache-size = 510 session-db = ${raddbdir}/db.ippool2 ip-index = ${raddbdir}/db.ipindex2 override = no maximum-timeout = 0 lease-duration = 86400 key = "%{NAS-IP-Address} %{Calling-Station-Id}" } With a big "lease-duration" we want the mobiles to get the same IP most of the time. The pool1 and pool2 are configured in accounting and post-auth of sites-enabled/default file... So, trying to be clear, what we need is: IF mobile CONNECTS via NAS1 -> Gets IP from pool1 IF mobile CONNECTS via NAS1 again -> Gets THE same IP from pool1 IF mobile CONNECTS via NAS2 -> Gets IP from pool2 IF mobile CONNECTS via NAS2 again -> Gets THE same IP from pool2 Everything seems to work, BUT, the mobiles are getting always 2 ips instead of 1. I mean: Mobile CONNECTS via NAS1 -> Gets IP from pool1 Mobile CONNECTS again via NAS1 -> Gets ANOTHER IP from pool1 Mobile CONNECTS via NAS2 -> Gets IP from pool2 Mobile CONNECTS again via NAS2 -> Gets ANOTHER IP from pool2 If I keep reconnecting with this mobile several times, I always get 1 of these 4 ips. Is there a better way to do what I need? Please, forgive me if I am not beeing clear enought, as English is not my primary language. I hope you can help me about this issue. Thank you very much for taking the time to read!