3Com PathBuilder S200 Series Owner's Manual page 20

Basic Remote Bridging Examples
A Less Complex
Extended Bridge
16
Figure 11 shows a possible arrangement of SVCs (PVCs for Frame Relay) that
produces the same bridge arrangement as shown in Figure 10.
Node 1
Bridge 1
Token
Ring 1
Bridge 2
SVC Connectors
Node 3
Bridge 2
Token
Ring 3
Bridge 3
Figure 11. Example of Bridges in an SVC Arrangement
In this arrangement, all LAN segments are one hop away from each other since they
are directly attached by a single pair of bridges. In Figure 11, Token Ring 1 is one
bridge away from Token Ring 2 and Token Ring 3 and the same applies for the other
rings.
From a bridged network point of view, Token Ring 1 is one bridge away from Token
Ring 3, but Node 1 is not directly connected to Node 3. Traffic between Token Ring
1 and Token Ring 3 does not have to pass through Token Ring 2. This is an important
advantage in configuring bridge networks with the PathBuilder S200 series switch
because you can form a minimal bridge network to accomplish the desired
interconnectivity.
Node 2
Bridge 1
Token
Ring 2
Bridge 3
Bridging