Redundancy duplicate ip address

I use LNS with freeradius, and I have two separate radius servers , the LNS support primary and secondary radius the server The radius server use standalone database server to auth and accut And using rlm_ippool files to handle and stored assigned IPS If the 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! http://search.live.com/cashback/?&pkw=form=MIJAAF/publ=HMTGL/crea=earncashba...