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Configuring ATM Services
2-14 114056 Rev. A
Of the different methods, having multiple PVCs per service record uses network
addressing most efficiently, and is the easiest to configure.
Although you need to configure each PVC manually, you need only define and
associate protocols with the ATM network service record. All the PVCs that you
configure for a given ATM service record carry the protocols that you select and
configure to run on that service record.
Multiple PVCs per service record works best in either fully meshed environments
or in nonmeshed environments where systems not directly connected to each other
have no need to communicate. You can configure multiple PVCs per service
record as long as you do not need to separate protocols by PVC (that is, all PVCs
accept the same protocols).
There are, however, ways to configure upper-layer protocols, such as IP or
Internet Packet Exchange (IPX), to allow systems in nonmeshed networks to fully
communicate. See the documentation for these upper-layer protocols for more
information.
One PVC
One PVC per service record works the same way as multiple PVCs per service
record, except that you assign only one PVC per service record. When you define
only one PVC per service record, upper-layer protocols treat the ATM network as
a series of direct, point-to-point connections, viewing each PVC as an individual
network interface.
You can, therefore, configure each PVC with different protocols and parameter
settings. This allows you to connect to different network sites using, for example,
different types of data encapsulation (Figure 2-7).
Note: When you configure multiple PVCs per service record, the PVCs all use
the data encapsulation type that you set for the ATM service record (that is, the
value of the Data Encapsulation Type parameter set in the ATM Service
Records List window). Refer to “Data Encapsulation,” earlier in this chapter,
for more information.
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