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IBM 520 - Page 163

IBM 520
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Choosing a Mode of Operation
The illustration shows:
Two subnetworks (Net 1 and Net 2) each composed of one
4-segment VNET. All traffic between ports in Net 1 or between
ports within Net 2 is port-to-port. All traffic between a port in
Net 1 and a port in Net 2 is peer-to-peer.
Two PeerMaster adapters, each configured as an independent
VNET.
Two instances of the VNET driver. All four ports of each
PeerMaster adapter are registered with the protocol as a single
subnetwork.
A curved arrow that shows the flow of port-to-port traffic
between VNETs. This traffic is forwarded by the internal router
of the server.
Curved arrows that indicate the flow of traffic within each
VNET. This traffic is forwarded by the microprocessor on each
PeerMaster adapter.
Each VNET can represent a different department or work group.
This configuration provides two virtual switches. Creating multiple
VNETs is a way of separating departments or work groups. The
internal router of the server can then be configured to pass selected
traffic between VNETs.
Chapter 4. Configuring the PeerMaster Adapter 145

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