The LAN-VPN operation mode controls the shared bandwidth by making use of the
following features:
• Learning bridges
• Spanning tree
• V-LAN (Virtual-LAN)
• CID (Customer Identifier)
• Assigned bandwidth policy (CIR = Committed Information Rate and PIR = Peak
Information Rate)
• Additional SDH bandwidth and SDH WAN bandwidth sharing
• Traffic policy (Strict policing/Oversubscription).
The following figure shows the network element configures in the LAN-VPN operation
mode
LAN-VPN with QoS mode
Starting with release 4.0, the LAN-VPN with QoS mode, which was supported in
releases prior to release 4.0, is no longer supported.
The QoS features which were supported by the LAN-VPN with QoS mode in previous
releases are different to the new QoS features supported in the 1643 AM release 4.0.
VPN tagging mode
VPN tagging is used to identify user frames in the LAN-VPN mode of operation. VPN
tagging is often also referred to as “transparent tagging”.
Ethernet Overview
Operational modes
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
11-33
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