EXP Computer S200 manual Configuring Translational Bridging

		Configuring the PathBuilder S200 Series Switch for Bridging Operation
Configuring Translational Bridging
Introduction
	This section explains how to configure your PathBuilder S24x, 26x, and 27x switch
	to implement the Translational Bridging feature.
What is
	Translational Bridging allows a PathBuilder S24x, 26x, and 27x switch to bridge
Translational	traffic between Ethernet and Token Ring networks. Upon receiving traffic from one
Bridging	network the PathBuilder S24x, 26x, and 27x switch’s Source Route translates the
	data into a translational bridge format that can be used by the other network.
	For Translational Bridging to function, several conditions must exist:
		• The Token Ring network must conform to IEEE standard 802.5 and the
		Ethernet network mst conform to 802.3.
		• The PathBuilder S24x, 26x, and 27x switch must contain a 4 Meg FLASH
		and be using one of these software options: Option 71 to 75.
		Note
		In a single node, Translational Bridging performance is limited to 350 packets
		per second.
Parameter
	To enable Translational Bridging, you need to set the parameter Link Mode =
	TRANS (in the Bridge Link Parameters Record). Also, be sure the parameter Virtual
	Ring Number is set to a unique value.
Configuration
	These factors should be considered when configuring your PathBuilder S24x, 26x,
Guidelines	and 27x switch for Translational Bridging:
		• Only one link in a PathBuilder S24x, 26x, and 27x switch can have the param-
		eter Link Mode = TRANS.
		• Only Bridge Link with Bridge Type = SR can have Link Mode = TRANS.
		• LLC Termination is not supported between Token Ring and Ethernet when
		using Translational Bridging.
		• You can increase the value of the parameter Aging Period (in the Bridge
		Parameters Record) to limit the relearning of the entries in the Translational
		Bridging MAC Address.
	For more information about configuring a PathBuilder S24x, 26x, and 27x switch for
	Translational Bridging, refer to the configuration example in the next section.
Configuration
	Figure 18 shows an example of a PathBuilder S24x, 26x, and 27x switch configured
Examples	for Translational Bridging between an Ethernet and Token Ring Network within the
	same node. The records and parameters that need to be configured for Translational
	Bridging are shown.

Note

In this example, the parameters in Bridge Link 1 and Bridge Link 2 records remain at their default values. However, to implement the default settings, you need to call up the records (from the CTP) and then save them.

Bridging 37

T0008-16F Release 5.2M