Avaya Configuring ATM Services Bedienungsanleitung PDF herunterladen (Seite 47)

ATM DXI Features and Implementation Notes

2-11

Before you conﬁgure hybrid access on your router, carefully evaluate the types of

routers you are connecting in your network. For example, combining Series 7

routers running in group access bridge mode with Series 7 or higher routers

running in hybrid access mode may cause broadcasting or spanning tree problems.

If you plan to conﬁgure such a network, contact the Bay Networks Technical

Response Center.

Using Hybrid Access for Transparent Bridging

In Figure 2-7, trafﬁc bridges between Site A and Site B. The bridge (Router 1)

runs on the ATM DXI network interface, and its conﬁguration has the PVCs

deﬁned for group access mode.

Figure 2-7. Example of a Bridged Network

In Figure 2-7, the bridge receives data from Site A. If the bridge does not

recognize the destination address, it tries to direct trafﬁc through another bridge

port. However, with group access mode conﬁgured, the ATM bridge port views

the paths to Site A and Site B as the same path. Because the bridge does not send

out data on the same bridge port from which it just received it, the bridge does not

direct the data to Site B. In this example, you need to use hybrid access mode.

Router 1

Bridge port sees one

path to Sites A and B

Router 2

Router 3

ATM

Network

Site A Site B

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Avaya Configuring ATM Services Bedienungsanleitung Seite 47