15 • Serial port configuration
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 on the SmartNode is done in the PVC configura-
tion 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
1
node (frm-rel)[ slot/port ]#pvc dlci Enters the PVC configuration mode by assigning a DLCI number
Example: Entering Frame Relay PVC configuration mode
The following example enters the configuration mode for PVC with the assigned DLCI of 1 for Frame Relay
over the serial interface on slot 0 and port 0 of a SmartNode.
SN(cfg)#port serial 0 0
SN(prt-ser)[0/0]#framerelay
SN(frm-rel)[0/0]#pvc 1
SN(pvc)[1]#
Configuring the PVC encapsulation type
You must use the PVC configuration command encapsulation rfc1490 to set the encapsulation type to comply
with the Internet Engineering Task Force (IETF) standard (RFC 1490). Use this keyword when connecting to
another vendor's equipment across a Frame Relay network.
This procedure describes how to set the encapsulation type to comply with RFC 1490
Mode: Frame Relay
Step
1
node (frm-rel)[ slot/port ]#encapsulation rfc1490 Sets RFC1490 PVC compliant encapsulation
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to be used on the specified sub interface
Command
SmartWare Software Configuration Guide
Purpose
Purpose
Serial port configuration task list
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