3Com 2426-PWR Installation And User Manual

Also see for 2226-SFP Plus: User guide

Contents

Configuring Port Settings 631000 Mbps connections are always full-duplex.Half-duplex connections are only available for 10 Mbpsand 100 Mbps settings.CAUTION: Before manually setting a port tofull-duplex, verify that the device connected to the portis also manually set to the same speed and duplexsetting. If connecting link partners are left toautonegotiate for a link manually set on this switch tofull-duplex, they will always negotiate to half-duplex,resulting in a duplex mismatch. This can result in asignificant reduction in network performance. If you areunsure of how to configure the speed/duplex setting,simply enable autonegotiation for the port.You cannot modify the speed/duplex settings of portsthat are members of a trunk or aggregated link.Supported SFP transceivers only operate at 1000 Mbpsfull-duplex. Inserting an SFP transceiver into a Gigabitport only disables the corresponding RJ-45 port whenthere is link on the SFP transceiver.Disabling a port that is delivering power will not disablethe power being delivered to a connected device.Link AggregationLink aggregation, also called “trunking”, refers tobonding multiple ports into a single group to effectivelycombine the bandwidth into a single connection or a“trunk”. If you are connecting the Switch to anotherswitch or to an Internet backbone, you can aggregatelinks on the Switch to increase throughput and preventpacket loopback between switches.For link aggregation to work, the trunks must beconfigured on both ends (switches).Four tabs are available on the Port Link Aggregationpage:■ Summary■ Create■ Modify■ RemoveGuidelines for Creating Trunks■ Any port on the Switch can be used for creating atrunk.■ The Switch supports a maximum of four trunks.■ Each trunk may contain up to eight members.■ A port may only be a member of one trunk at anyone time.■ All ports in a trunk must be configured in anidentical manner, including communication mode(that is, speed, duplex mode and flow control).■ Both 10/100 and Gigabit ports cannot be combinedas members in a single trunk.