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VIRTUAL LANS (VLANS)

A virtual LAN (VLAN) is a logical definition of a network work group. It is roughly equivalent to a broadcast domain. A VLAN interface is your system’s point of attachment to a given VLAN. A VLAN and a VLAN interface are analogous to an IP subnetwork and an IP interface.

For more information about VLANs, see the Implementation Guide for your system.

Menu Structure The commands that you can use depend on the system that you have, your level of access, and the types of modules and other hardware options that are configured for your system. The following diagram shows the complete list of commands for all systems. See the checklist at the beginning of each command description in this chapter for whether your system supports the command.

Top-Level Menu

system module management ethernet fddi

bridge ip ipx appletalk qos snmp analyzer log script logout disconnect

bridge menu

display ipFragmentation ipxSnapTranslation addressThreshold agingTime spanningTree gvrpState

cos port multicast packetFilter

vlan trunk mpla link

vlan menu

summary detail define modify remove mode stpMode vlanAwareMode

The bridge vlan stpMode command is available only when you enable allClosed mode on the CoreBuilder® 3500 system or the

CoreBuilder 9000 Layer 3 switching modules. The command does not appear when you are using the default VLAN mode (allOpen) or when you use allClosed mode on a Layer 2 system or module.

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3Com 3500 manual Virtual Lans Vlans