Chapter 3: Advanced Configuration
Chapter 3
35
DHCP Web Page (Fig. 23)
This page gives you the ability to activate and deactivate the DHCP server function of your
gateway, and, if the DHCP server is activated, to see DHCP leases it has provided.
With this function activated, your cable company’s DHCP server provides one IP address for your
gateway, and your gateway’s DHCP server provides IP addresses, starting at the address you set in
Starting Local Address, to your PCs. A DHCP server
leases
an IP address with an expiration time.
To change the lowest IP address that your gateway will issue to your PCs, enter it into the
Starting Local Address
box and then click Apply.
To set the maximum number of PCs to which the gateway will issue IP addresses, enter it in the
Number of CPEs
box and then click Apply. (
CPE
is another term sometimes used for PC.) The
DHCP
Client Lease Info
section shows leases the gateway DHCP server has made, including the IP and
MAC addresses of each PC’s TCP/IP stack. Since MAC addresses are unique and permanently fixed
into hardware, you can identify any PC listed by its MAC address. The gateway provides leases for
1 hour, and has an automatic renewal mechanism that will keep extending a lease as long as the
associated PC remains active. If your PC is set to “obtain an IP address automatically,” it is set to
perform DHCP each time it is rebooted.
You can cancel an IP address lease by selecting it in the DHCP Client Lease Info list and then
clicking the Force Available button. If you do this, you may have to perform a DHCP Renew on
that PC, so it can obtain a new lease.
Fig. 23
16096620 DCW615. 03 Advanced
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