ZyXEL Communications Corporation OX253P Manual De Usuario
Chapter 6 The LAN Configuration Screens
OX253P User’s Guide
61
6.6.1 IP Address and Subnet Mask
Similar to the way houses on a street share a common street name, computers on
a LAN share one common network number.
a LAN share one common network number.
Where you obtain your network number depends on your particular situation. If
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
the ISP or your network administrator assigns you a block of registered IP
addresses, follow their instructions in selecting the IP addresses and the subnet
mask.
If the ISP did not explicitly give you an IP network number, then most likely you
have a single user account and the ISP will assign you a dynamic IP address when
the connection is established. If this is the case, it is recommended that you select
a network number from 192.168.0.0 to 192.168.255.0 and you must enable the
Network Address Translation (NAT) feature of the OX253P. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private
use; please do not use any other number unless you are told otherwise. Let's say
you select 192.168.1.0 as the network number; which covers 254 individual
addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In
other words, the first three numbers specify the network number while the last
number identifies an individual computer on that network.
have a single user account and the ISP will assign you a dynamic IP address when
the connection is established. If this is the case, it is recommended that you select
a network number from 192.168.0.0 to 192.168.255.0 and you must enable the
Network Address Translation (NAT) feature of the OX253P. The Internet Assigned
Number Authority (IANA) reserved this block of addresses specifically for private
use; please do not use any other number unless you are told otherwise. Let's say
you select 192.168.1.0 as the network number; which covers 254 individual
addresses, from 192.168.1.1 to 192.168.1.254 (zero and 255 are reserved). In
other words, the first three numbers specify the network number while the last
number identifies an individual computer on that network.
Once you have decided on the network number, pick an IP address that is easy to
remember, for instance, 192.168.1.1, for your OX253P, but make sure that no
other device on your network is using that IP address.
remember, for instance, 192.168.1.1, for your OX253P, but make sure that no
other device on your network is using that IP address.
The subnet mask specifies the network number portion of an IP address. Your
OX253P will compute the subnet mask automatically based on the IP address that
you entered. You don't need to change the subnet mask computed by the OX253P
unless you are instructed to do otherwise.
OX253P will compute the subnet mask automatically based on the IP address that
you entered. You don't need to change the subnet mask computed by the OX253P
unless you are instructed to do otherwise.
6.6.2 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 OX253P as a DHCP server or disable it. When configured as a server,
the OX253P provides the TCP/IP configuration for the clients. If DHCP service is
disabled, you must have another DHCP server on your LAN, or else each computer
must be manually configured.
individual clients to obtain TCP/IP configuration at start-up from a server. You can
configure the OX253P as a DHCP server or disable it. When configured as a server,
the OX253P provides the TCP/IP configuration for the clients. If DHCP service is
disabled, you must have another DHCP server on your LAN, or else each computer
must be manually configured.
The OX253P 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.
(DHCP Pool). See the product specifications in the appendices. Do not assign static
IP addresses from the DHCP pool to your LAN computers.
These parameters should work for the majority of installations. If your ISP gives
you explicit DNS server address(es), see
you explicit DNS server address(es), see
Section 6.3 on page 56
.