sorry for the previous email that contains spilling errors :( I use LNS with freeradius, and I have two separate radius servers , the LNS support primary and secondary radius server The radius server use standalone database server to auth and accut And using rlm_ippool files to handle and store assigned IPS If we enabled the secondary radius server in this case, may it will assign duplicate IP Address, that primary radius was assigned them before Please any hint to fix this problem or any better scenario Thanks Earn cashback on your purchases with Live Search - the search that pays you back! Learn More _________________________________________________________________ Introducing Live Search cashback . It's search that pays you back! http://search.live.com/cashback/?&pkw=form=MIJAAF/publ=HMTGL/crea=introsrchc...