Using the BayStack 410-24T 10BASE-T Switch1-44 309985-C Rev 00Because there is only one link between the two switches, the Spanning TreeProtocol (STP) treats this configuration as any other switch-to-switch connection.For this configuration to work properly, both switches must support the 802.1Qtagging protocol.VLANs Spanning Multiple Untagged SwitchesFigure 1-23 shows VLANs spanning multiple untagged switches. In thisconfiguration switch S2 does not support 802.1Q tagging and a single switch porton each switch must be used for each VLAN.For this configuration to work properly, spanning tree participation must be set toDisabled because the STP is not supported across multiple LANs.Figure 1-23. VLANs Spanning Multiple Untagged SwitchesWhen the STP is enabled on these switches, only one link between each pair ofswitches will be forwarding traffic. Because each port belongs to only one VLANat a time, connectivity on the other VLAN will be lost. Exercise care whenconfiguring the switches to ensure that the VLAN configuration does not conflictwith spanning tree configuration.VLAN 1S1S2VLAN 2BayStack 410-24TUntagged portsUntagged portsNon-802.1Qtagging switchBS41021A
