Alcatel-Lucent 1643 AMS User's Operation Manual page 417

Traffic provisioning
The following figure shows the network element configures in the LAN-VPN operation
mode
IEEE 802.1Q STP virtual switch mode
The IEE802.1Q/IEEE 802.1a VLAN tagging scheme can be seen as an extension of the
LAN-VPN mode, providing more flexibility in defining the VPN's and in general
leading to a more efficient use of bandwidth. In IEEE 802.1Q VLAN tagging mode, a
virtual switch is formed by a combination of LAN- and WAN ports on a physical
switch that is used by different VLAN's which can share the common WAN
bandwidth. Each port can be part of only one virtual switch, but a certain port may be
associated with more than one VLAN. The ports that are associated with a certain
VLAN ID form the VLAN Port Member Set.
On ingress, each packet is filtered on its VLAN ID. If the receiving port is a member
of the VLAN to which a received MAC frame is classified, then the frame is
forwarded. The user can provision whether untagged packets are dropped, or tagged
with a PVID (Port VLAN ID), via the acceptable frame type parameter.
Example VLAN trunking
The VLAN trunking example shown in the next figure is one of the possible
applications in this operation mode.
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365-312-807R7.2
Issue 4, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
Operational modes
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