Extreme Networks ExtremeWare XOS 11.3, Manual

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Virtual LANs
ExtremeWare XOS 11.3 Concepts Guide
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VLANs ease the change and movement of devices — With traditional networks, network
administrators spend much of their time dealing with moves and changes. If users move to a
different subnetwork, the addresses of each endstation must be updated manually.
Virtual Routers and VLANs—BlackDiamond 10K Switch Only
NOTE
You create virtual routers only on the Black Diamond 10K switch; the BlackDiamond 8800 family of switches
(formerly known as Aspen) and the Summit X450 switch do not support user-created virtual routers.
ExtremeWare XOS supports virtual routers. Beginning with XOS version 11.2, each port can belong to
multiple virtual routers; that is port can belong to more than one virtual router. Ports can belong to
different VLANs that are in different virtual routers.
If you do not specify a virtual router when you create a VLAN, the system creates that VLAN in the
default virtual router (VR-Default). The management VLAN is always in the management virtual router
(VR-Mgmt).
Once you create virtual routers, ExtremeWare XOS software allows you to designate one of these virtual
routers as the domain in which all your subsequent configuration commands, including VLAN
commands, are applied. Once you create virtual routers, ensure that you are creating each VLAN in the
desired virtual router domain. Also, ensure that you are in the correct virtual router domain before you
begin modifying each VLAN.
For information on configuring and using virtual routers, see Chapter 10 .
Types of VLANs
NOTE
Beginning with ExtremeWare XOS version 11.3, you may have netlogin dynamic VLANs and, on the Summit X450
switch and BlackDiamond 8800 family of switches only, netlogin MAC-based VLANs. See
Chapter 17 for complete
information on netlogin.
VLANs can be created according to the following criteria:
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Physical port
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IEEE 802.1Q tag
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Ethernet, LLC SAP, or LLC/SNAP Ethernet protocol type
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A combination of these criteria
Port-Based VLANs
In a port-based VLAN, a VLAN name is given to a group of one or more ports on the switch.