Configuring Switching Information 339• Spanning Tree CommandsThe following table summarizes the equivalent CLI commands for this feature.Configuring VLANsAdding Virtual LAN (VLAN) support to a Layer 2 switch offers some of the benefits of both bridging androuting. Like a bridge, a VLAN switch forwards traffic based on the Layer 2 header, which is fast, and likea router, it partitions the network into logical segments, which provides better administration, securityand management of multicast traffic.A VLAN is a set of end stations and the switch ports that connect them. You may have many reasons forthe logical division, such as department or project membership. The only physical requirement is thatthe end station and the port to which it is connected both belong to the same VLAN.Each VLAN in a network has an associated VLAN ID, which appears in the IEEE 802.1Q tag in the Layer2 header of packets transmitted on a VLAN. An end station may omit the tag, or the VLAN portion ofthe tag, in which case the first switch port to receive the packet may either reject it or insert a tag usingits default VLAN ID. A given port may handle traffic for more than one VLAN, but it can only supportone default VLAN ID.To display the VLAN menu page, click Switching →VLAN in the tree view. This VLAN page containslinks to the following features:• VLAN Membership• Double VLAN• VLAN Port Settings• VLAN LAG Settings• Bind MAC to VLAN• Bind IP Subnet to VLAN• Protocol Group• GVRP ParametersVLAN MembershipUse the VLAN Membership page to define VLAN groups stored in the VLAN membership table. Yourswitch supports up to 4094 VLANs. However, you can actually create only 4092 VLANs because:Table 7-24. MST Port CommandsCLI Command Descriptionspanning-tree mst 0 external-cost Sets the external cost for the common spanning tree.spanning-tree mst cost Configure the path cost for multiple spanning tree (MST) calculations.spanning-tree mst port-priority Configures port priority.
