3Com 3C16476BS-US - Baseline 2250 Plus Switch User Manual

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36 CHAPTER 4: C ONFIGURING THE SWITCHFigure 19 Uplink VLAN ConfigurationTo set up the configuration shown in Figure 19, dothe following:1 Create VLAN2 on both Switch 1 and Switch 2, andassign the same name to it. You need not createVLAN1 since it exists by default.2 On Switch 1, set the ports that you want to be part ofVLAN2 to Desktop mode. Set one port (for example,port 16) to Uplink mode.Click Apply.3 On Switch 2, set the ports that you want to be part ofVLAN2 to Desktop mode. Set one port (for example,port 8) to Uplink mode.Click Apply.4 Connect the uplink port on Switch 1 (in this example,port 16) to the uplink port on Switch 2 (in this exam-ple, port 8).Those ports on Switch 1 that are members of VLAN2can now communicate with those ports on Switch 2that are members of VLAN2.Configuring TrunkingTrunking, also called “link aggregation”, refers tobonding multiple ports into a single group to effec-tively combine the bandwidth into a single connec-tion or a “trunk”. If you are connecting the Switch toanother switch or to an Internet backbone, you canaggregate links on the Switch to increase throughputand prevent packet loopback between switches.For link aggregation to work, the trunks must be con-figured on both ends (switches).The Switch does not support the Link AggregationControl Protocol (LACP), which is specified in IEEE802.3ad.Guidelines for Creating Trunks■ Any port on the Switch can be used for creating atrunk.■ This 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.Switch 1 Port 16 in VLANs 1 and 2 (Uplink)Endstationin VLAN 2(Desktop)Endstationin VLAN 1 (Desktop) Serverin VLAN 1 (Desktop)Endstationin VLAN 2(Desktop)Endstationin VLAN 1 (Desktop)Serverin VLAN 2 (Desktop)Switch 2 Port 8 in VLANs 1 and 2 (Uplink)