3Com 2426-PWR Installation And User Manual

Also see for 2226-SFP Plus: User guide

Contents

Configuring VLANs 49VLAN DetailUse this screen to display detailed VLAN information.1 Enter a set of VLANs or select all VLANs to add to thedetails list, then click Select.2 From the drop down menu, choose a VLAN to displaythe associated tagged and untagged member ports.Figure 37 VLAN Detail ScreenForwarding Tagged/Untagged FramesEach port on the Switch is capable of passing tagged oruntagged frames.The following describes how the Switch will handletagged and untagged frames.■ When a port receives a tagged frame with a VLANID and the port is a member (untagged or tagged) ofthat VLAN, the frame is accepted. Otherwise the ifthe port is not a member of that VLAN, the frame isdiscarded.■ When a port receives an untagged frame and theport is an untagged member of a VLAN, the frame isaccepted and assigned to that VLAN ID. Otherwise ifthe port is not an untagged member of any VLAN,the frame is discarded.The Switch will only forward a frame to ports that aremembers (tagged or untagged) of the VLAN to whichthe frame is assigned. If the port is an untaggedmember, the egress frame will be stripped of the VLANtag and forwarded as untagged. However, if the port isa tagged member, the egress frame is forwarded astagged.Sample VLAN ConfigurationsTo illustrate how you can segment network devices thatare connected to the Switch, the following sampleconfigurations are provided.