3Com Dual 56K User Manual page 82

82 C 7: A
HAPTER DVANCED
Configuring the LAN
Parameters
C
ONFIGURATION
reconfigure the workstations' IP addresses via the Workstations Parameters
window. For a LAN using dynamic IP addresses, restart your workstation to acquire
a new IP address. Or, if you have Windows 95 or 98, launch winipcfg.exe
(probably located in your Windows directory), and click Release All and then
Renew All. For Windows NT, run ipconfig /release and then ipconfig/renew.
Local Domain Name
The local domain name identifies your LAN. LAN refers to the network created by
the LAN Modem and the devices attached to it.
Enable DHCP Server
The LAN Modem provides DHCP server functionality for the LAN which
automatically assigns a network or IP address to a newly attached workstation on
your IP network. If another device on your LAN is providing this functionality, or if
you are using static IP addresses, then you should disable the DHCP server.
NetBIOS Filtering
For Windows Users: NetBIOS is primarily used by Windows 98, 95, NT, and 2000
for local file and printer sharing, although it may also be used on other operating
systems. This protocol can make spurious DNS requests which can inadvertently
cause the LAN Modem to establish unwanted calls to your Service Provider,
resulting in subsequent charges to your phone bill.
The following options are provided.
Always Block (default): Choosing this option will block all NetBIOS traffic which
has been generated on the local LAN from being passed to the WAN. In this
case, calls will not be placed due to NetBIOS traffic, and NetBIOS traffic will not
be sent to the WAN once calls have been initiated. If you have no need to
perform file or printer sharing over your WAN connection, choose this option.
Note that enabling the NetBIOS filter will not affect your ability to share files
and printers over your LAN.
Block Call Initiation: This option will prevent NetBIOS traffic which has been
generated on the local LAN from initiating automatic data calls. Once a call has
been established, NetBIOS traffic can then be passed to the WAN over the
established connection. Note however that choosing this option may prevent a
call from automatically timing out.
Never Block: Choosing this option will allow all locally-generated NetBIOS
traffic to pass to the WAN. Note that enabling this option may cause the
launching of spurious calls, and it may prevent these calls from automatically
hanging up.
To configure LAN parameters, do the following.
1 From the Main Configuration Home Page, click the LAN Parameters icon.
The LAN (Ethernet) Parameters window appears.
2 In the IP Address field, review the default and enter a different IP address, if
required.
3 In the Subnet Mask field, review the default and enter a different subnet mask, if
required.