Patton electronic SmartNode 4110 Series ユーザーズマニュアル
Frame Relay configuration task list
181
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).
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:
length without fragmenting the voice packets:
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.
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.
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.
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.
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.
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
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
Step
Command
Purpose
1
node(frm-rel)[slot/port]#pvc dlci Enters the PVC configuration mode by assigning a DLCI number
to be used on the specified sub interface