ZyXEL VMG3927-B50B User Guide - Page 130

DHCP Setup, DNS Server Addresses

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Chapter 8 Home Networking 8.9 Technical Reference This section provides some technical background information about the topics covered in this chapter. 8.9.1 LANs, WANs and the VMG The actual physical connection determines whether the VMG ports are LAN or WAN ports. There are two separate IP networks, one inside the LAN network and the other outside the WAN network as shown next. Figure 62 LAN and WAN IP Addresses 8.9.2 DHCP Setup DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain TCP/IP configuration at start-up from a server. You can configure the VMG as a DHCP server or disable it. When configured as a server, the VMG provides the TCP/IP configuration for the clients. If you turn DHCP service off, you must have another DHCP server on your LAN, or else the computer must be manually configured. IP Pool Setup The VMG is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the product specifications in the appendices. Do not assign static IP addresses from the DHCP pool to your LAN computers. 8.9.3 DNS Server Addresses DNS (Domain Name System) maps a domain name to its corresponding IP address and vice versa. The DNS server is extremely important because without it, you must know the IP address of a computer before you can access it. The DNS server addresses you enter when you set up DHCP are passed to the client machines along with the assigned IP address and subnet mask. There are two ways that an ISP disseminates the DNS server addresses. VMG4927-B50A / VMG9827-B50A / VMG3927-B50B User's Guide 130

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Chapter 8 Home Networking
VMG4927-B50A / VMG9827-B50A / VMG3927-B50B User’s Guide
130
8.9
Technical Reference
This section provides some technical background information about the topics covered in this chapter.
8.9.1
LANs, WANs and the VMG
The actual physical connection determines whether the VMG ports are LAN or WAN ports. There are two
separate IP networks, one inside the LAN network and the other outside the WAN network as shown
next.
Figure 62
LAN and WAN IP Addresses
8.9.2
DHCP Setup
DHCP (Dynamic Host Configuration Protocol, RFC 2131 and RFC 2132) allows individual clients to obtain
TCP/IP configuration at start-up from a server. You can configure the VMG as a DHCP server or disable it.
When configured as a server, the VMG provides the TCP/IP configuration for the clients. If you turn DHCP
service off, you must have another DHCP server on your LAN, or else the computer must be manually
configured.
IP Pool Setup
The VMG is pre-configured with a pool of IP addresses for the DHCP clients (DHCP Pool). See the product
specifications in the appendices. Do not assign static IP addresses from the DHCP pool to your LAN
computers.
8.9.3
DNS Server Addresses
DNS (Domain Name System) maps a domain name to its corresponding IP address and vice versa. The
DNS server is extremely important because without it, you must know the IP address of a computer
before you can access it. The DNS server addresses you enter when you set up DHCP are passed to the
client machines along with the assigned IP address and subnet mask.
There are two ways that an ISP disseminates the DNS server addresses.