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Cisco Router and Security Device Manager Version 2.2 User’s Guide
OL-4015-08
Chapter3 Create Connection Wizards
PVC
The encapsulations available if you have a serial interface are shown in the
following table.
PVC
ATM routing uses a two-layer hierarchical scheme, virtual paths, and virtual
channels, denoted by the virtual path identifier (VPI) and virtual channel
identifier (VCI), respectively. A particular virtual path may carry a number of
different virtual channels corresponding to individual conn ections. When
switching is performed based on the VPI, all cells on that particular virtual path
are switched regardless of the VCI. An ATM switch may route according to VCI,
VPI, or both VCI and VPI.

VPI

Enter the VPI value obtained from your service provider or system administrator.
The virtual path identifier (VPI) is used in ATM switching and routing to identify
the path used for a number of connections. Enter the VPI value given to you by
your service provider.
Encapsulation Description
Frame Relay Provides Frame Relay encapsulation. This option is available when
you have selected a serial interface. A serial subinterface will be
created when you create a Frame Relay connection. This subinterface
will be visible in the Summary window.
Note If a Frame Relay serial connection has been added to an
interface, only Frame Relay encapsulation will be enabled in
this window when subsequent Serial connections are
configured on the same interface.
Point-to-Point Protocol Provides PPP encapsulation. This option is available when you have
selected a serial interface.
High Level Data Link Control Provides HDLC encapsulation. This option is available when you
have selected a serial interface.