c_config_vlans_about
Available Languages
About VLANs
A VLAN is a network that is logically segmented by function, project team, or application, without regard to the physical locations of the users. VLANs have the same attributes as physical LANs, but you can group end stations even if they are not physically located on the same LAN segment. Any port can belong to a VLAN, and unicast, broadcast, and multicast packets are forwarded and flooded only to end stations in the VLAN. Because a VLAN is considered a separate logical network, it contains its own bridge Management Information Base (MIB) information and can support its own implementation of spanning tree.
Supported VLANs
The controller supports VLANs in VTP client, server, and transparent modes. VLANs are identified by a number from 1 to 4094. VLAN 1 is the default VLAN and is created during system initialization. VLAN IDs 1002 through 1005 are reserved for Token Ring and FDDI VLANs. All of the VLANs except 1002 to 1005 are available for user configuration. All VTP versions support both normal and extended range VLANs, but only with VTP version 3, does the controller propagate extended range VLAN configuration information. When extended range VLANs are created in VTP versions 1 and 2, their configuration information is not propagated. Even the local VTP database entries on the controller are not updated, but the extended range VLANs configuration information is created and stored in the running configuration file. You can configure up to 4094 VLANs on the controller.
What to do next:
FeedbackContact Cisco
- Open a Support Case
- (Requires a Cisco Service Contract)