EXP Computer S200 manual Bridge, Connections, LAN Interface, Support

Bridge Hardware Components in PathBuilder S200 Series Switches

Bridge Hardware Components in PathBuilder S200 Series Switches

Introduction	This section describes bridge hardware configuration and connections for the
	PathBuilder S200 series switch.
Bridge
	Figure 12 shows the physical connections of the modules that provide bridging

Configuration and functionality for PathBuilder S200 series switch. This figure shows a LAN port

Connections	module and supporting WAN Adapter module within a PathBuilder S200 series
	switch. The LAN port module is broken out into a driver and a forwarder to show the
	concept of bridge links.
	At each end node, the bridge has connections referred to as bridge links. Bridge links
	that connect to the LAN are referred to as LAN bridge links. Bridge links that
	connect to remote bridges across the WAN are referred to as WAN bridge links.

LAN Link Numbers range from 1 to

4:up to two LAN connections are supported for Ethernet.

		LAN Port Module
			5
Token		1	.
	LAN	LAN	.
Ring	Driver	Bridge	.
LAN		Forwarder	.
			32

Up to 32 WAN links can be defined (numbered 5 to 36), one for each bridge connection over an SVC (PVC for Frame Relay).

WAN	X.25 SVCs connected to
Adaptor	SVCs on network ports
	(PVCs for Frame Relay)

	Figure 12. LAN Port Module and WAN Adapter Module (Logical View)
	The LAN port consists of low level drivers and the bridge forwarder. This can be
	viewed as the functioning bridge. The WAN Adapter is closely associated with the
	bridge. The WAN Adapter provides the network services that the bridge requires in
	order to function over the WAN network. The principal service is establishing and
	maintaining SVC (PVC for Frame Relay) connections to remote LAN bridge
	forwarders so that virtual circuits can be formed between the forwarders.
	The bridge sees the LAN and the WAN (by means of the WAN Adapter) as networks
	it is attached to by links. There are a total of 36 links: four LAN links and 32 WAN
	links.
LAN Interface
	The PathBuilder S200 series switch supports only one LAN per node, so only one
Support	link is needed for the LAN port connection: link number 1. The PathBuilder S24x,
	26x, and 27x switch supports up to two Ethernet LANs per node. See “Dual LAN
	Ethernet” section on page 117 for more details on this functionality.
	On the PathBuilder S200 series switch links numbered 2 to 4 are not used and are
	reserved for future configurations. WAN links are numbered 5 to 36 and provide up
	to 32 WAN connection links which correspond to potential bridges.
Bridging	17

T0008-16F Release 5.2M