Creating VLANs

When you create VLANs using VLAN Manager, follow these rules:

• VLANs must have unique VLAN IDs and names.
• Trunk (tagged) ports can belong to multiple VLANs and multiple spanning tree groups.
• A VLAN cannot belong to multiple spanning tree groups.
• An access (untagged) port can belong to one and only one port-based VLAN or it can belong to one and only one policy-based VLAN for the given protocol.
• If you enable tagging on a port that is in a VLAN, the spanning tree group configuration for that port is lost.
• A frame's VLAN membership is determined by the following order of precedence:

­

VLAN ID

­	Source MAC-based VLAN

­	IP subnet-based VLAN

­	Protocol-based VLAN

­	Port-based VLAN

See also:

• Creating a port-based VLAN
• Creating a source IP subnet-based VLAN
• Creating a protocol-based VLAN
• Creating a source MAC address-based VLAN