Dear all, I'm using the freeradius(freeradius-1.1.0-19 ) on mobile network. GGSN contacts the radius server like below. 1.GGSN---Accounting Off request--->Radius 2.GGSN<--Accounting Off response---Radius 3.GGSN---Accounting On request--->Radius After 5 sec, 4.GGSN---Accounting On request--->Radius 5.GGSN<--Accounting On response---Radius I don't know why GGSN tries to send the Accounting On request "twice".It is always after 5sec. I checked the ethereal log on Radius,Radius is responding correctly to GGSN.But,GGSN is not receiving the response on the first try. Excuse me but,please give me the advice asap. G------------S G w---------Radius S------------i N c h I tried to use the one link between GGSN and Switch,but it looks same.