
114062 Rev. B 4-1
Chapter 4
Implementation Notes
for All Dial Services
This chapter describes Bay Networks implementations for all three dial services.
Point-to-Point Protocol
You can use Point-to-Point Protocol (PPP) across dial-up lines for any dial
service. Site Manager automatically configures PPP on lines in a bandwidth pool.
For lines in a demand or backup pool, PPP is not configured automatically; you
must select it. PPP routes, or bridges, datagrams over point-to-point lines.
Synchronous, asynchronous, and ISDN interfaces all use PPP.
PPP Authentication
Dial circuits use a PPP identification mechanism to identify the calling router to
the called router. The identification mechanism relies on one of two PPP
authentication protocols: Challenge Handshake Authentication Protocol (CHAP)
or Password Authentication Protocol (PAP). These authentication protocols
implement a security feature that identifies peer routers to one another.
CHAP is the default authentication protocol. To select PAP, you must open the
PPP Interface List window, select the line record for dial services, and specify
PAP for the Local Authentication Protocol parameter. For more information about
CHAP and PAP, see Configuring PPP Services.
The identification process takes place during PPP link negotiation, which occurs
before the routers establish a connection to send protocol data. Enabling the called
router to dynamically identify the calling router lets a single dial interface (ISDN
or modem) at a remote router serve as the connection point to multiple routers.
Comentarios a estos manuales