CHAPTER
10-1
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
10
Configuring VLANs
This chapter describes how to configure normal-range VLANs (VLAN IDs 1 to 1005) and
extended-range VLANs (VLAN IDs 1006 to 4094) on the Cisco ME 3800X and ME 3600X switch. It
includes information about VLAN membership modes, VLAN configuration modes, and VLAN trunks.
Note For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
• Understanding VLANs, page 10-1
• Creating and Modifying VLANs, page 10-5
• Displaying VLANs, page 10-9
• Configuring VLAN Trunks, page 10-9
Understanding VLANs
A VLAN is a switched 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
switch port can belong to a VLAN, and unicast, broadcast, and multicast packets are forwarded and
flooded only to end stations in the VLAN. Each VLAN is considered a logical network, and packets
destined for stations that do not belong to the VLAN must be forwarded through a router, as shown in
Figure 10-1. Because a VLAN is considered a separate logical network, it contains its own bridge MIB
information and can support its own implementation of spanning tree. See Chapter 13, “Configuring
STP.”
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