Motorola WS2000 - Wireless Switch - Network Management Device System Reference Manual page 186

9-4 WS2000 Wireless Switch System Reference Guide
2. From the Subnet configuration screen click the Update DNS button located in the DHCP section of the
screen.
After the Update DNS button has been clicked, an ADD DNS message for all the active leases on the
DHCP server for that subnet is sent to the DNS server. A DELETE DNS message for all the inactive leases
on the DHCP server for that subnet is sent to the DNS server.