Address Translation; Figure 1-4. Address Translation - Bay Networks Nautica 200 Reference Manual

Address Translation

Figure 1-4.
117237-C Rev. A
To achieve this scenario, a PPP call is made via the ISDN/PSTN
to a Nautica 4000
the Internet to the PPTP-enabled host, such as Windows NT, on
the remote network, and data is now able to be transmitted.
For information on setting up PPTP on a Nautica product, refer to
Chapter 5 and Chapter 10.
Address Translation
In this example the client PC needs to send information to a
non-PPTP enabled host on a remote LAN. The client PC might
also have a non-compliant, internally issued IP address which is
not compatible with the Internet.
PPP is the protocol used to send information to the remote LAN,
but it is not possible to send PPP on a local Ethernet LAN. In this
instance, the client PC wraps its PPP data in PPTP which is then
sent across the Ethernet LAN to Nautica 4000 A. Included with
the call setup is the ISDN number of Nautica 4000 B. Nautica
4000 A strips away the PPTP information and then sends a PPP
packet to Nautica 4000 B.
Understanding the Technology
®
FEP, the 4000 establishes a tunnel through
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