3Com 2848 SFP User Guide - Page 44

44 CONFIGURING THE SWITCH BPDUs initiated by the Root Bridge. If a bridge does not get a Hello BPDU after a predetermined interval, the bridge assumes that the link to the Root Bridge is down. This bridge will then initiate negotiations with other bridges to reconfigure the network to re-establish a valid network topology. After all the bridges on the network have determined the configuration of their ports, each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each network segment. All other ports are blocked, which means that they are prevented from forwarding traffic. Figure 26 Spanning Tree Screen ■ Block and Discard - Spanning tree BPDUs received on a port are dropped. The Switch does not forward BPDUs to other ports. The Switch does not participate as a bridge node in the spanning tree, it can only be configured to forward or block spanning tree BPDUs. If the Switch is connected to other bridging devices, such as switches, that are part of the spanning tree network, set the Switch to "Forward." If the Switch is connected only to workstations, it can be set to "Block and Discard." Support Selecting Support on the main menu displays the support links screen, which contains a list of Internet links that provide information and support concerning the Switch. (Figure 27) Figure 27 Support Screen ■ Forward - Spanning tree BPDU packets received on a port are forwarded to all other ports.