Compatible Systems 5.4 - Manual (Page 296)

290 Appendices
The following diagram shows a four interface router which also supports
bridging. Two of the router’s interfaces (Port 0 and Port 1) are set to bridge
IP, and two interfaces (Port 1 and Port 2) are also set to bridge IPX.
Bridge Groups on a Multiport Router
The diagram illustrates two Bridge Groups. The IP Bridge Group consists of
Port 0 and Port 1. The network segments connected to these two interfaces
appear as a single logical segment for IP routing purposes. That is, they will
share a single IP network number, subnet mask, and broadcast address. IP
communications between these two segments will be bridged, not routed.
The IPX Bridge Group consists of Port 1 and Port 2. The network segments
connected to these two interfaces appear as a single logical segment for IPX
routing purposes. That is, they will share a single IPX network number. IPX
communications between these two segments will be bridged, not routed.
In this example, the segment connected to Port 3 has its own IP network
number, subnet mask, and broadcast address. It also has its own IPX network
number. Thus all IP and IPX communications between this segment and the
two Bridge Groups is routed.
Finally, assuming that non-routable protocols have not been excluded, Ports
0, 1 and 2 all appear as a single physical segment to NetBEUI and DEC LAT.
Port 0
Port 1
Port 2
Port 3
IP Bridge Group
IPX Bridge Group
Multiport Router/Switch