Supported Vlans - Cisco IE 3000 Software Configuration Manual

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Understanding VLANs

Cisco router

VLANs are often associated with IP subnetworks. For example, all the end stations in a particular IP

subnet belong to the same VLAN. Interface VLAN membership on the switch is assigned manually on

an interface-by-interface basis. When you assign switch interfaces to VLANs by using this method, it is

known as interface-based, or static, VLAN membership.

Traffic between VLANs must be routed or fallback bridged.

Supported VLANs

The switch supports VLANs in VTP client, server, and transparent modes. VLANs are identified by a

number from 1 to 4094. VLAN IDs 1002 through 1005 are reserved for Token Ring and FDDI VLANs.

VTP only learns normal-range VLANs, with VLAN IDs 1 to 1005; VLAN IDs greater than 1005 are

extended-range VLANs and are not stored in the VLAN database. The switch must be in VTP

transparent mode when you create VLAN IDs from 1006 to 4094.

Although the switch supports a total of 255 (normal range and extended range) VLANs, the number of

configured features affects the use of the switch hardware.

The switch supports per-VLAN spanning-tree plus (PVST+) or rapid PVST+ with a maximum of 128

spanning-tree instances. One spanning-tree instance is allowed per VLAN. See the

VLAN Configuration Guidelines" section on page 13-5

spanning-tree instances and the number of VLANs. The switch supports only IEEE 802.1Q trunking

methods for sending VLAN traffic over Ethernet ports.

Cisco IE 3000 Switch Software Configuration Guide

shows an example of VLANs segmented into logically defined networks.

VLANs as Logically Defined Networks

for more information about the number of

Configuring VLANs

"Normal-Range

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