Setting Up the Switch Ports 4-13IFM is not available on a port which has full duplexenabled:n If the Duplex Mode field in this screen is set toFull Duplex, the Intelligent Flow Managementfield is not displayedn In all other cases where the port has full duplexenabled, IFM has no effectSecurity Enable / Disable When Security is enabled,the port enters single address learning mode. TheSwitch removes all addresses currently stored in theSwitch Database against the port. The Switch thenlearns the source address from the first packet itreceives on the port since Security was enabled.Once the first address is learnt, no other endstationis permitted to access the network through the port.If an endstation with a different address attempts totransmit packets onto the network through theport, the port is automatically disabled and a trap isgenerated. The port remains disabled until it isenabled from the Port Setup screen or via SNMPmanagement.A more comprehensive set of security features isavailable through SNMP network management.Security is not available on backbone ports. If theport has been defined as a backbone port, theSecurity field is not displayed.Disable Interactive Access Yes / No This fieldallows you to disable the Interactive Access featureof PACE (Priority Access Control Enabled) on thecurrent port. You should disable Interactive Accesson a port if:n The port is connected to a repeatern The port is connected to a device with Interac-tive Access enabledFor more information about the Interactive Accessfeature, refer to “Setting Up the Switch Unit” onpage 4-9.VLT Mode Enable / Disable This field allows you tospecify whether the port is a VLT (Virtual LAN Trunk)port. A Virtual LAN Trunk (or VLT) is aSwitch-to-Switch link which carries traffic for all theVLANs on each Switch. To create a VLT, the ports onboth ends of the link must be VLT ports. For moreinformation about VLTs, refer to “VLANs and theSwitch” on page 5-3.If the port uses AutoSelect VLAN Mode (refer tothe VLAN Configuration Mode field), you cannotspecify that the port is a VLT port.
