OmniSwitch 6800/6850/9000 Network Configuration Guide March 2008 page 4-1
4 Configuring VLANs
In a flat bridged network, a broadcast domain is confined to a single LAN segment or even a specific
physical location, such as a department or building floor. In a switch-based network, such as one
comprised of Alcatel-Lucent switching systems, a broadcast domain—or VLAN— can span multiple
physical switches and can include ports from a variety of media types. For example, a single VLAN could
span three different switches located in different buildings and include 10/100 Ethernet, Gigabit Ethernet,
802.1q tagged ports and/or a link aggregate of ports.
In This Chapter
This chapter describes how to define and manage VLAN configurations through the Command Line
Interface (CLI). CLI commands are used in the configuration examples; for more details about the syntax
of commands, see the OmniSwitch CLI Reference Guide.
Configuration procedures described in this chapter include:
• “Creating/Modifying VLANs” on page 4-5.
• “Defining VLAN Port Assignments” on page 4-7.
• “Enabling/Disabling VLAN Mobile Tag Classification” on page 4-9.
• “Enabling/Disabling Spanning Tree for a VLAN” on page 4-10.
• “Enabling/Disabling VLAN Authentication” on page 4-11.
• “Configuring VLAN Router Interfaces” on page 4-11.
• “Bridging VLANs Across Multiple Switches” on page 4-14.
• “Verifying the VLAN Configuration” on page 4-15.
For information about statically and dynamically assigning switch ports to VLANs, see Chapter 10,
“Assigning Ports to VLANs.”
For information about defining VLAN rules that allow dynamic assignment of mobile ports to a VLAN,
see Chapter 12, “Defining VLAN Rules.”
For information about Spanning Tree, see Chapter 7, “Configuring Spanning Tree Parameters.”
For information about routing, see Chapter 18, “Configuring IP.”
For information about Layer 2 VLAN authentication, see Chapter 26, “Configuring Authenticated
VLANs.”
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