Intel ER8100STUS - Express 8100 Router, Справочное руководство

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Reference.bok : Chapter01 3 Wed Apr 22 10:58:08 1998
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WAN Services
LAN and WAN Services in the Router
WAN Services and Protocols Available
WAN services overview
WAN services are private or public data networks (PDNs) available to subscrib-
ers for interconnecting remote sites. The Intel Express 8100 Router supports:
■
Leased lines
■
Switched (dial-up) connections
■
Point-to-Point Protocol (PPP)—described in “Point-to-Point Protocol
(PPP)”, p. 8
■
Frame Relay services—described in Chapter 3 “Frame Relay Services”, p.
17
■
ISDN connections and services—described in Chapter 4 “ISDN Services”,
p. 20
■
X.25 services—described in Chapter 5 “X.25 Services”, p. 32
■
PPP Multilinks which combine a number of PPP links into a single route
between two sites—described in
Chapter 6 “PPP Multilinks”, p. 39
■
Internet Tunnels for routing data via the internet—described in Chapter 7
“Internet Tunnels”, p. 41
Number of WAN links
supported
The Intel Express 8100 Router supports up to 5 WAN links (Frame Relay, ISDN
or X.25).
Leased lines
A leased line is a permanent physical connection between two Local Area Net-
works. The costs for the use of a leased line are fixed—that is, they are indepen-
dent of the amount of data transmitted. A leased line is normally used when there
is a need for constant data flow between two sites.
Dial-up links
Dial-up links (also referred to as switched links or switched lines) are links that
are only established when data requires transmitting over the WAN link and are
similar in operation to a normal telephone connection. Dial-up WAN links re-
quire the use of a modem or other WAN connect device designed to establish this
type of connection.
The number for the dial-up WAN link is configured in the modem or WAN con-
nect device (not for ISDN and X.25 links). This is a prerequisite for V.11, V.24,
V.35 and V.36 WAN connections.
General Facilities for WAN Services
Introduction
This section gives an overview and describes the WAN service features common
to all WAN link types available in the Intel Express 8100 Router.