Patton electronic SmartNode 4110 Series manual Entering Frame Relay PVC configuration mode

SmartWare Software Configuration Guide 15 • Frame Relay configuration

End-to-end FRF.12 fragmentation is recommended for use on permanent virtual circuits (PVCs) that share links with other PVCs transporting voice and on PVCs transporting Voice over IP (VoIP).

The fragmentation size depends on the available bandwidth, the chosen codec, and its packet length:

•The less bandwidth available per call, the smaller the fragment size has to be configured.

•The shorter the voice packets, the smaller the fragment size can be configured.

•The smaller the fragment size, the bigger the overhead for long data packets.

The following table shows the minimum fragment size depending on the configured codec and its packet length without fragmenting the voice packets:

Codec (bytes)	Packet Period (ms)	Minimum Fragment Size
G.729	10	52
G.729	20	62
G.729	30	72
G.723	30	66
G.723	60	90
G.723	90	114
G.711	10	122
G.711	20	202
G.711	30	282

Entering Frame Relay PVC configuration mode

The permanent virtual circuit (PVC) is a virtual circuit that is permanently established. PVCs save bandwidth associ- ated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time.

The Frame Relay network provides a number of virtual circuits that form the basis for connections between stations attached to the same Frame Relay network.

The resulting set of interconnected devices forms a private Frame Relay group, which may be either fully inter- connected with a complete mesh of virtual circuits, or only partially interconnected.

In either case, each virtual circuit is uniquely identified at each Frame Relay interface by a Data Link Connection Identifier (DLCI). In most circumstances, DLCIs have strictly local significance at each Frame Relay interface.

Assigning a DLCI to a specified Frame Relay sub interface is done in the PVC configuration mode. The DLCI has to be in the range from 1 to 1022.

Note A maximum of eight PVCs can be defined.

This procedure describes how to enter the PVC configuration.

Mode: Frame Relay

Step Command Purpose

1node(frm-rel)[slot/port]#pvcdlci Enters the PVC configuration mode by assigning a DLCI number to be used on the specified sub interface

Frame Relay configuration task list 181