Avocent Cyclades-PR2000 Pppchar, Hdlc, Frame Relay, Traffic Control based on Data Link Connection

Cyclades-PR2000

PPPCHAR

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.

HDLC

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.

Frame Relay

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 12 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 12. More details are available in the CyROS Reference Guide.

STEP ONE

The first step is to set the general Frame Relay parameters, those applying to all DLCs. This is done in the Frame Relay Menu. The parameters are shown in the table below. Most of these depend on the standards used by the Frame Relay Network Provider.

Chapter 8 - Data-Link Protocols (Encapsulation) 55