Configuring the CBR Module 121Enabling and Disabling the Spanning TreeSpanning Tree (IEEE 802.1d) is a technique that detects loops in a network andlogically blocks the redundant paths, ensuring that only one route exists betweenany two LANs. It eliminates the duplication of packets and provides fault tolerancefor resilient networks.To enable or disable the Spanning Tree, follow these steps:1 From the Configuration Management menu, select [3] Manage Bridge to displaythe Manage Bridge menu, shown earlier in Figure 84.2 From the Manage Bridge menu, select the number corresponding to the slot andport combination for which you want to enable or disable the Spanning Tree. TheBridge Menu for the selected slot/port combination appears, as shown earlier inFigure 86.3 Select [1] Setup to display the Bridge Setup menu, shown earlier in Figure 88.4 Select [1] Set Spanning Tree Operation. The following prompt appears:Enter Spanning Tree Operation (1=Disable, 2=Enable):5 Enter 1 or 2 to disable or enable the Spanning Tree.For further information on Spanning Tree and how it operates, see “TypicalEthernet and Voice Application Configurations” in Appendix B.Configuring the CBRModuleThe optional CBR module features three T1/E1 CBR ports and one serial port(PathBuilder S330) or one T1/E1 CBR port and one serial port (PathBuilder S310).Configuring the CBR module involves the following tasks:n Configuring the CBR T1/E1 port(s)n Configuring the CBR serial portn Configuring the CBR cardConfiguring the CBRT1-DSX/E1 Port(s)To configure the CBR T1-DSX/E1 port(s), follow these steps:1 From the Configuration Management menu, select [1] Manage Card.2 From the List Card menu, shown earlier in Figure 51, select [7] CBR to open theCBR Configuration Selection menu. Figure 93 shows the CBR E1 ConfigurationSelection menu. The CBR T1-DSX Configuration Selection menu is the same.
