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Beta Draft Confidential
18-2
1/19/05
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring SPVCs
About SPVCs
About SPVCs
There are two types of ATM virtual connections: virtual channel connections (VCCs)
and virtual path connections (VPCs). These virtual connections are made up of a
series of virtual links which form a path between two endpoints. Based on the type of
virtual connection you are using (VCC or VPC), you can create either a soft
permanent virtual channel connection (SPVCC) or a soft permanent virtual path
connection (SPVPC).
When working with SPVCs, you can configure a connection that is point-to-point or
point-to-multipoint (PMP). In a PMP configuration, the CBX/GX endpoint defined as
the root can access several terminating endpoints (configured as leaves).
When you create an SPVC, you configure one endpoint (known as the originating
endpoint), as you would a PVC. You select the logical port on which the endpoint will
reside, and assign a virtual path identifier/virtual channel identifier (VPI/VCI) value.
You configure the other endpoint(s) (known as the terminating endpoints) with
addresses, as you would an SVC. Optionally, you may also specify the remote
VPI/VCI values. The originating endpoint uses signaling to access the terminating
endpoints.
If you configure the terminating endpoint with a port prefix, the connected device
must signal the port address. Specifying just the port prefix is not enough information.
The address must be advertised by the endpoint for the SPVC to connect.
SPVCs (offnet circuits) are supported on CBX 3500, CBX 500, GX 550, and
B-STDX 9000 multiservice switches through mixed virtual network navigator (VNN)
and PNNI domains.
Note – In order to use the Interworking feature within the PNNI routing domain, you
must enable the PNNI routing protocol in the network. For information on enabling
PNNI on Lucent switches, see
Chapter 21, “Configuring PNNI Routing.”
In addition, you must enable the PNNI Name Translation parameter on the Set Switch
Attributes dialog box so that the switch can use the PNNI routing protocol and
interoperate with other PNNI switches in the network. See the Navis EMS-CBGX
Getting Started Guide for information on enabling this parameter when you set switch
attributes.
Summary of Contents for CBX 3500
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