3Com 3CBLUG16A User Guide - Page 33

always negotiate to half-duplex, resulting in a duplex mismatch. This can result in a significant reduction in network performance. If you are unsure of how to configure the speed/duplex setting, simply enable autonegotiation for the port. You cannot modify the speed/duplex settings of ports that are members of a trunk or aggregated link. Supported SFP transceivers only operate at 1000Mbps full-duplex. Inserting an SFP transceiver into a gigabit port disables the corresponding RJ-45 port, even if no fiber cable is inserted. Advanced Port Configuration Use the Advanced Port Configuration tab to set the Switch's broadcast storm control and threshold limits. A broadcast storm is an incorrect packet sent out on a network that causes most hosts to respond all at once, typically with wrong answers that start the process over again. Broadcast storms use substantial network bandwidth and may cause network time-outs. Advanced settings include: ■ Broadcast Storm Control - Enables and disables broadcast storm control ■ Packet Rate Threshold - Sets the broadcast storm threshold. Available options include 500,1000,1500, 5000, 10000, and 15000 bytes per packet. Configuring VLANs 33 Figure 13 Advanced Port Configuration Page Default Port Settings If you do not configure the Switch's port settings, the ports will use the following default settings: ■ All ports are enabled ■ Autonegotiation is enabled ■ Flow control is enabled ■ All ports are set to priority Standard Configuring VLANs A virtual LAN (VLAN) is a collection of network nodes that share the same collision domain, regardless of their physical location or connection point in the network. A