Compatible Systems 5.4 Manuale Utente

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