Avocent Cyclades-PR4000 ユーザーズマニュアル

The configuration of the PPPCHAR protocol is contained in the menu CONFIG =>INTERFACE =><LINK>
=>ENCAPSULATION =>PPPCHAR.  The parameters for PPPCHAR are a combination of those for PPP and
CHAR.  See the tables describing the PPP and CHAR options for guidance in configuring this protocol.

This data-link protocol is a proprietary alternative to PPP.  It has only one parameter, the

 HDLC Keepalive Interval

.

This is the time interval between transmission of Keepalive messages. The receiver of these messages must
send keepalive messages with the same frequency or will be considered inoperative.

FR supports multiple connections over a single link.  Each data link connection (DLC)  has a unique DLCI (data
link connection identifier).  This allows multiple logical  connections to be multiplexed over a single channel.
These are called Permanent Virtual Circuits (PVCs).  The DLCI has only local significance and each end of the
logical connection assigns its own DLCI from the available local numbers.

Traffic Control based on Data Link Connection

Traffic Control as described in chapter 14 can also be performed on a Frame Relay interface for each permanent
virtual connection.  The parameters in the 

Add DLCI

 menu are used in the same manner as those described in

chapter 14.  More details are available in the CyROS Reference Guide.