Hirschmann BAT54-F Series User Manual

Routing and WAN connections
BAT54-Rail/F..
Release 7.54 06/08
11.10 Establishing connection with PPP
435
D Negotiation of the connection parameters, e.g. the MTU (Maximum
Transmission Unit, ’Manual definition of the MTU’ → page 453).
D Verification of the connection through the LCP (Link Control Protocol)
D Combining several ISDN or DSL channels (MultiLink PPP resp. MultiLink
PPPoE)
PPP is the standard used by router connections for communication between
devices or the WAN connection software of different manufacturers. Connec-
tion parameters are negotiated and a common denominator is agreed using
standardized control protocols (e.g. LCP, IPCP, CCP) which are contained in
PPP, in order to ensure successful data transfer where possible.
U What is PPP used for?
It is best to use the point-to-point protocol in the following applications:
D for reasons of compatibility when communicating with external routers, for
example
D remote access from remote workstations with ISDN cards
D Internet access (when sending addresses)
The PPP which is implemented by BAT can be used synchronously or asyn-
chronously not only via a transparent HDLC connection, but also via an X.75
connection.
U The phases of PPP negotiation
Establishment of a connection using PPP always begins with a negotiation of
the parameters to be used for the connection. This negotiation is carried out
in four phases which should be understood for the sake of configuration and
troubleshooting.
D Establish phase
Once a connection has been made at the data communication level,
negotiation of the connection parameters begins through the LCP.
This ascertains whether the remote site is also ready to use PPP, and the
packet sizes and authentication protocol (PAP, CHAP, MS-CHAP or
none) are determined. The LCP then switches to the opened state.
D Authenticate phase
Passwords will then be exchanged, if necessary. The password will only
be sent once if PAP is being used for the authentication process. An
encrypted password will be sent periodically at adjustable intervals if
CHAP or MS CHAP is being used.
Perhaps a callback is also negotiated in this phase via CBCP (Callback
Control Protocol).
D Network phase
BAT, supports the protocols IPCP and IPXCP.

Hirschmann BAT54-F Series Specifications

General

Brand	Hirschmann
Model	BAT54-F Series
Category	Wireless Access Point
Language	English