OT: Ascsend NAS misbehaving

[Len Conrad]

We are upgrading an ancient ICRadius to FreeRadius 2.

We have some equally ancient Ascend NAS dial-up boxes.  

The Ascends are reconfigged to send their radius traffic to the new radius server IP and that works, but their DHCP DNS values are stuck on the old DNS IPs.  We've changed the DHSP DNS values to new IPs, reboot the Ascends, their configs show the new DNS IPs, but they are passing out the old DNS IPs in the leases.

suggestions?

thanks
Len