Avaya Configuring ATM Services Bedienungsanleitung Seite 46

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Configuring ATM Services
2-10
If your network combines bridging and routing over the same interface, you need
PVCs in group access mode for routing, while at the same time you need bridging
to operate over these same PVCs. Since group access mode does not allow for
bridging in nonmeshed environments, you must use hybrid access mode. In this
mode, a PVC behaves like a direct access PVC for bridging while maintaining
group access characteristics for routing protocols (Figure 2-6).
Figure 2-6. Hybrid Access Mode
For hybrid access mode, you must configure all PVCs manually and assign
bridging protocols to run on each PVC. Hybrid access supports all protocols that
are available for the ATM interface: IP, IPX, XNS, DECnet Phase IV, AppleTalk,
VINES, and bridge.
Note: When you select hybrid access mode for a PVC, Site Manager provides
only three protocol options: Bridge, Spanning Tree, and Native Mode LAN
(NML). These protocols, as well as the protocols that are on the ATM
interface, can run on the PVC.
Site A
Routing protocol sees
one interface to the network
Bridge protocol sees two interfaces
to the network
I
I
= Interface to Network
Routing
Protocol
Bridge
Protocol
I
I
Site B
Hybrid PVC
Hybrid PVC
Direction of Data
ATM
Network
ATM
Network Interface
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