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Configuring Individual WAN Connections
Introduction to WAN links
The MAX unit provides a number of Dynamic Host Configuration Protocol (DHCP) services,
such as responses to DHCP requests from hosts that need to borrow IP addresses.
With a MAXPOTS FXS slot card installed, a MAX unit can initiate and receive Plain Old
Telephone Service (POTS) calls.
Introduction to WAN links
This chapter describes configuring various types of links across the WAN. It focuses on the
encapsulation issues for the following types of connections:
Connection type
PPP
MP, MP+, BACP
Challenge Handshake
Authentication Protocol
(CHAP) and Microsoft's
extension of CHAP
(MS-CHAP)
ARA
Terminal server
Combinet
EU-UI and EU-RAW
4-2
Description
PPP enables single-channel, dial-in connections from modems or
ISDN devices. The remote devices must have PPP software.
MP, MP+ and BACP encapsulation enable the MAX unit to
interact with MP-compliant equipment from other vendors to use
multiple channels for a call.
CHAP authentication verifies the caller's identity by using a
three-way handshake upon initial link establishment, and then by
repeating the handshake any number of times. MS-CHAP is a
close derivative of CHAP. Where CHAP authenticates
WAN-aware secure software, MS-CHAP supports remote
workstations, on which an insecure plain text login might be
required.
ARA enables a Macintosh user to access AppleTalk devices or IP
hosts via modem. The remote Macintosh must have ARA client
software and (if applicable) TCP/IP software.
The MAX unit terminal server processes asynchronous calls
from analog modems, ISDN modems (V.120 terminal adapters),
or raw TCP. You can log those calls into the terminal-server
interface or, if they contain PPP, pass the asynchronous calls to
the router.
Combinet bridges two network segments at the link level, using
one or two channels. The remote device is another Combinet
bridge.
EU-UI and EU-RAW are two different types of WAN
encapsulation protocols used primarily in Europe. The MAX unit
uses EU-UI when the equipment on the other side of the
connection requires the Data Circuit-Terminating Equipment
(DCE) and Data Terminal Equipment (DTE) address fields in the
packet header. When the connection does not require these
address fields, the MAX unit uses EU-RAW. EU-UI and
EU-RAW connections can be dial-in or dial-out.
EU-UI and EU-RAW encapsulation do not support an
authentication protocol. Use CLID authentication to match
incoming calls to the proper Connection profile when, for
example, you apply special filters to certain callers, or some
callers route IP and others bridge.
MAX 6000/3000 Network Configuration Guide
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