Advanced Tunneling (Ppp/Pptp) Concepts; Point To Point Tunneling - Alcatel speed touch home Advanced User's Manual

14 Advanced Networking Concepts

14.4 Advanced Tunneling (PPP/PPTP) Concepts

14.4.1

Point to Point Tunneling

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Tunneling is a well known method to transport a protocol over a
network that actually does not support this protocol, e.g. IPX
packets can be wrapped in IP , ready to be routed over an IP
network. At the destination the IPX packets are decapsulated and
consequently available in their original format again.
Tunneling applied to the Speed Touch Home implies:
Tunnels have a local scope.
"
PPTP tunnels are established between two peers on the local
IP network: local PCs initiate tunnels, the STHome terminates
these tunnels.
IP tunnels are established and released for the duration of a
"
session;
the protocol carried inside the tunnels is PPP . Various protocols
"
can be carried inside the PPP packets.
The net result of PPTP tunneling is that PPP packets can cross
the local Ethernet segment between the STHome and the client
computer and vice versa. This would otherwise not be possible as
PPP is designed to run on point to point connections, e.g. Dial Up
connections, whereas Ethernet is a shared medium.
3EC 17096 AAAA TCZZA Ed. 01