3Com OfficeConnect, Руководство пользователя

Страница: 42 / 112

42
If you are using static addresses for your PCs you must alter the
network configuration on each PC so that they have an IP
address within the same subnet as the Router and have their
default Gateway set as the Router’s LAN IP address.
If you reconfigure your network you may need to change your
Subnet Mask . The Subnet Mask detemines how many addresses
are available to your network. The default Subnet Mask is
255.255.255.0.
For example if the IP Address of your Router is 192.168.1.1 and
the Subnet Mask of your network is 255.255.255.0 then your
network can have a maximum of 254 addresses from
192.168.1.1 to 192.168.1.254 (192.168.1.0 and 192.168.1.255
are reserved by the subnet and are not available for use).
When you change the IP Address or Subnet Mask of the Router
you should review the DHCP Server settings as described below.
Changing the DHCP Server Settings
This section allows to you enable, disable and configure the
settings of the Router’s DHCP server.
If you intend to use the Router to control the permissions of
individual machines on your network then you must use the
Router’s DHCP server to allocate addresses (or use static
addressing). If you use another DHCP server you may get
unexpected results. See
“PC Privileges” on page 50 .
To enable the DHCP Server ensure that the Enable check box is
ticked. To disable the DHCP Server ensure that the Enable check
box is cleared. Click Apply to validate your changes.
Set the IP Pool Start Address and IP Pool End Address to the first
and last address you want the Router to allocate to computers.
The IP address pool must be contained within the subnet as
defined in “Changing the LAN Settings” on page 41. The default
start and end addresses are 192.168.1.100 and 192.168.1.200.
The Local Domain Server is set to Domain as default.
If you have a WINS Server on your network enter its IP address in
the
WINS Server box. The Router will pass this information on to
all Windows PCs that obtain an address from its DHCP server.
If you have a 3Com NBX Call Processor on your network enter its
IP address in the
3Com NBX Call Processor box. The 3Com NBX
Call Processor acts as a switchboard for voice-over-IP phones and
the Router will pass on this information.
If you will be using One-to-One NAT you must set up a range
that is one less than the number of public addresses allocated to
you by your ISP. The DHCP range must also be identical to the
range specified when you set up One-to-One NAT. See
“Setting
up One-to-One NAT” on page 45 .
DHCP Clients List
The DHCP Clients List screen provides details of the devices that
have been given IP addresses by the Router’s DHCP server. For
each device that has been granted a lease, the
IP address , Host
Name and MAC address of that device is displayed.
dua08609-5aaa01.book Page 42 Thursday, September 11, 2003 12:15 PM