EXP Computer S200 manual Basic Remote Bridging Examples, Across a WAN

				Basic Remote Bridging Examples
Basic Remote Bridging Examples
Introduction
	This section shows some common examples of bridging applications using
	PathBuilder S200 series switches.
Remote Bridging
	Figure 9 shows a common Source Route Bridging operation for PathBuilder S200
Across a WAN	series switches where two Token Ring LANs are attached across a WAN. For
	example, two LANs could be bridged using two PathBuilder S200 series switches
	interconnected by an X.25 or Frame Relay link. Bridged traffic flows between the
	bridges over a Switched Virtual Circuit (SVC) that connects them together across the
	WAN (or Permanent Virtual Circuit (PVC) for Frame Relay).
		PBS200	X.25/Frame Relay		PBS200
	Token					Token
	Ring 1	Node 1			Node 2	Ring 2

Figure 9. PB S200s Connecting LANs via an X.25/Frame Relay Link

Extended Bridging for Multiple LANs

If more than two remote LANs are involved in your bridging application, the bridge arrangement can be extended so that individual LAN pairs are connected by different bridges, as shown in Figure 10.

Token Ring 1

Token Ring 3

Node 1

Bridge 1

Bridge 2

Node 3

Bridge 2

Bridge 3

Node 2
Bridge 1	Token
Bridge 3	Ring 2

SVC Connectors (PVC for Frame Relay)

Figure 10. Two-Port Bridges Connecting Multiple Token Ring LANs

In this example, each pair of LANs is connected by a single bridge formed by bridge pairs.

•Bridge 1 interconnects Token Ring 1 and Token Ring 2

•Bridge 2 interconnects Token Ring 1 and Token Ring 3

•Bridge 3 interconnects Token Ring 2 and Token Ring 3

Bridging 15

T0008-16F Release 5.2M