Advanced configurations, Overview – Alcatel Carrier Internetworking Solutions 1000 ADSL User Manual
Page 53
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Windows 95 and Windows 98 allow you to create only one tunnel at a time. This
means that you cannot connect to an ISP and the corporate network
simultaneously.
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Tunneling within a tunnel is not possible with Windows 95 because of its single
tunnel limitation.
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Windows NT does not share these two limitations. It is possible to
create multiple tunnels and simultaneously connect to multiple remote
destinations. A tunnel within a tunnel is also possible, assuring better
end-to-end security.
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After you create a tunnel, communication with local workstations may be lost.
This is because the Windows operating system adds a new default gateway to its
routing table. This new default gateway points to the tunnel. Because TCP/IP is
designed to use only one default gateway, connection through the original gateway
is lost.
When the tunnel is terminated, connection through the original default gateway is
reestablished.
You can avoid this problem by manually adding routes to local destinations in the
routing table.
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Access to an ISP or corporate network typically requires minimal configuration for
end-to-end connectivity. However, it is possible to customize settings of the ADSL
modem to accommodate specific configurations. The ability to configure
parameters in the modem requires a local connection between the modem and the
PC.
This connection is made through the Ethernet port of the modem. An IP address
is configured to allow a web browser in the PC to communicate to the modem.
The following are options for local connection to the modem: