Compatible Systems 5.4 manual Bridging 153 Bridging On, Priority, Path Cost Spanning Tree

Chapter 9 - Bridging 153

ϖNote: WAN bridging is not recommended for ports set to On Demand PPP Link operation. Bridging requires that any broadcast traffic received on one Bridge Group port be resent on all other Bridge Group ports. The net effect is to keep on-demand links up all the time.

ϖNote: This CompatiView dialog box is only used to set the per interface values for bridging parameters. The majority of bridging parameters are set in the Main Bridging Configuration Dialog Box. To access this dialog box, select Global/Bridging from the Device View.

>Bridging On

This checkbox determines whether this interface will perform bridging or not. In order for bridging to occur, the global Bridge On checkbox must also be set in the Main Bridging Configuration Dialog Box.

• If checked, the interface will participate in bridging. All non-routable protocols will be bridged. Routable protocols may or may not be bridged, depending on the setting in the individual protocol dialog box for this interface.

• If unchecked, no packets will be bridged by this interface.

Priority

This parameter determines the precedence given to this interface by the bridge. By default the lowest numbered interface (i.e. interface 0) will have precedence. Values may range from 0 to 255. The default is 128.

Path Cost (Spanning Tree)

This parameter sets the “cost” of using the interface, which in turn sets the calculated “distance” from the spanning tree’s Root Bridge. Distances are used when calculating spanning tree topology. This value may be used to arti- ficially change the topology of a spanning tree network. Values may range from 1 to 65,535.

The default value for Ethernet ports is 100, as recommended by the IEEE. The default value for WAN ports is 5000.