3Com 3C63311 Reference Guide - Page 133

Configuring the CBR Module 121 Enabling and Disabling the Spanning Tree Spanning Tree (IEEE 802.1d) is a technique that detects loops in a network and logically blocks the redundant paths, ensuring that only one route exists between any two LANs. It eliminates the duplication of packets and provides fault tolerance for resilient networks. To enable or disable the Spanning Tree, follow these steps: 1 From the Configuration Management menu, select [3] Manage Bridge to display the Manage Bridge menu, shown earlier in Figure 84. 2 From the Manage Bridge menu, select the number corresponding to the slot and port combination for which you want to enable or disable the Spanning Tree. The Bridge Menu for the selected slot/port combination appears, as shown earlier in Figure 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 "Typical Ethernet and Voice Application Configurations" in Appendix B. Configuring the CBR Module The 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 port n Configuring the CBR card Configuring the CBR To configure the CBR T1-DSX/E1 port(s), follow these steps: T1-DSX/E1 Port(s) 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 the CBR Configuration Selection menu. Figure 93 shows the CBR E1 Configuration Selection menu. The CBR T1-DSX Configuration Selection menu is the same.