Chapter 8 Home Networking
VMG1312-B Series User’s Guide
158
8.10.1 LANs, WANs and the Device
The act ual physical connect ion determ ines whet her the Device port s are LAN or WAN por t s. There
are t wo separate I P net works, one inside t he LAN network and t he other outside the WAN net work
as shown next .
Figure 58 LAN and WAN I P Addresses
8.10.2 DHCP Setup
DHCP ( Dynam ic Host Configurat ion Prot ocol, RFC 2131 and RFC 2132) allows individual client s to
obt ain TCP/ I P configuration at start- up from a server. You can configure the Device as a DHCP
server or disable it. When configured as a server, t he Device provides t he TCP/ I P configuration for
the client s. I f you t urn DHCP service off, you m ust have anot her DHCP server on your LAN, or else
the com put er m ust be m anually configured.
IP Pool Setup
The Device is pre- configured with a pool of I P addresses for t he DHCP client s ( DHCP Pool) . See t he
product specificat ions in the appendices. Do not assign st atic I P addresses from the DHCP pool to
your LAN com puters.
8.10.3 DNS Server Addresses
DNS ( Dom ain Nam e System ) m aps a dom ain nam e to its corresponding I P address and vice versa.
The DNS server is extrem ely im por t ant because without it, you m ust know t he I P address of a
com puter before you can access it. The DNS server addresses you ent er when you set up DHCP are
passed to the client m achines along with t he assigned I P address and subnet m ask.
Ther e are t wo ways that an I SP dissem inates t he DNS server addresses.
• The I SP tells you t he DNS server addresses, usually in t he form of an inform at ion sheet , when
you sign up. I f your I SP gives you DNS server addresses, enter t hem in the DN S Se rve r fields in
the D H CP Se t up screen.
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