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Beta Draft Confidential
18-4
1/19/05
ATM Services Configuration Guide for CBX 3500, CBX 500, GX 550, and B-STDX 9000
Configuring SPVCs
About SPVCs
Specifying the Target Select Type
The originating endpoint may optionally specify the remote VPI or VPI/VCI for an
SPVC. This feature is called the Target Select Type. A target select type of Any means
that the appropriate VPI or VPI/VCI has been locally configured at the terminating
endpoint or that the network is free to select a VPI or VPI/VCI.
A target select type of Specified means that the terminating endpoint is obligated to
use a specific VPI or VPI/VCI, as determined by the originating endpoint. This
information is propagated by signaling. However, use of the Specified target select
type has the following limitations:
•
You have Lucent equipment at both the originating and terminating endpoints. As
long as this is the case, the connecting portion of the network can contain network
equipment from any vendor, using any protocol.
•
You only have Lucent equipment at one endpoint, but the SPVC traverses only
Lucent Virtual Network Navigator (VNN) or PNNI links. Some LAN-based ATM
networks currently support the PNNI protocol.
•
If the SPVC must traverse UNI or Interim Inter-switch Signalling Protocol (IISP)
links, and one end of the SPVC is not Lucent equipment, you cannot use the
Specified target select type.
summarizes the results of using SPVC target select type in conjunction
with PVC/PVP termination.
Table 18-2.
SPVC Target Select Type
Originating Endpoint
Target Select Type
Terminating Endpoint
Termination Type
Behavior at Terminating
Endpoint
Any
Any
Network allocates any available
VPI or VPI/VCI.
Any
Specified VPI or
VPI/VCI
Accept SPVC on a specified VPI or
VPI/VCI. The SVC port address is
dedicated to terminating this single
SPVC.
Specified VPI or
VPI/VCI
Any
Accept SPVC on a specified VPI or
VPI/VCI; the SVC port address
may terminate additional SPVCs.
Specified VPI or
VPI/VCI
Specified VPI or
VPI/VCI
Accept SPVC if VPI or VPI/VCI
match; reject SPVC if they do not
match. The SVC port address is
dedicated to terminating this single
SPVC.
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