Motorola WS2000 - Wireless Switch - Network Management Device System Reference Manual page 249

12-37
WS 2000 Use Cases
He also selects the option This interface is a DHCP Server. Choosing this DHCP option means that the
switch will pick IP addresses from the Address Assignment Range and assign them to network clients on this
subnet, as needed.
This screen also sets the IP address for the switch's interface to the subnet. Any address that starts with
"192.168" is an internal-use-only IP address. That is, network administrators are free to use these IP
addresses anyway they want, as long as the IP addresses are never visible to the outside world. The switch
defaults to an address of 192.168.0.1 for the first subnet interface. Leo elects to use the range of IP
addresses from 192.168.0.11 to 192.168.0.254 for the DHCP clients in this subnet.
Leo then selects the Advanced DHCP Server button. The DNS server IP addresses and the Gateway IP
address entered here will be passed down the DHCP clients for this subnet for their own use while
associated with this subnet. Leo enters the IP addresses that the corporation's IT department has specified
for the corporate primary and secondary DNS servers. For the gateway, Leo enters the IP address for the
subnet, the same IP address that he entered for the IP Address in the IP Parameters section of the Subnet
screen.
The DHCP Lease Time (sec) specifies how long in seconds a client may keep an IP address when that client
is not active on the net. The lease time is currently set for 86,400 seconds, or 24 hours. Leo expects that
people using these WLANs will connect for a work day or not. While in the office, he expects that their
machines will initiate contact with the network every 10 or 15 minutes for email. When they unplug to go
home, this lease time will hold their IP address for another full day and not return it to the usable pool until
the end of the next day. Leo would prefer that the lease time expire sometime during the night. He figures a
lease time of somewhere between 10,000 seconds and 30,000 seconds is appropriate for this application.
Leo sets it to 10000 seconds and figures he will change it if anyone complains.
The WINS Server field is designed to supply the Windows Network Server IP address to any DHCP clients
that request it. Leo supplies the IP number for the local WINS server.