
Configuring ATM Services
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Use hybrid PVCs when creating nonmeshed network configurations that use both
bridging and routing over a single ATM interface. These PVCs work best for
spanning tree bridging.
Figure 2-8. Hybrid PVCs
Using Hybrid PVCs for Transparent Bridging
In Figure 2-9, traffic bridges between Site A and Site B. The bridge (Router 1) is
running on the ATM network interface, and its PVCs are not defined as
hybrid/bridged VCs.
Note: When you define a PVC as a hybrid/bridged VC, Site Manager provides
additional Bridge, Spanning Tree, and Native Mode LAN (NML) protocol
options. These protocols run on the PVC along with the protocols defined in
the ATM service record.
SITE A
Bridge protocol sees two interfaces
to the network
I
I = Interface
Routing
protocol
Bridge
protocol
SITE B
Direction of data
ATM
network interface
Hybrid PVC
Hybrid PVC
Routing protocol sees
one interface to the network
ATM
Network
I
I
ATM0012A
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