Alcatel-Lucent 1643 AMS User's Operation Manual page 412

Traffic provisioning
VPN tagging is characterized as follows:
• Selecting the VPN tagging mode implies that the port role of the ports is fixed.
LAN ports are always customer role ports, and WAN ports are always network role
ports (see
• VPN tagging is a double tagging mode. This means that a customer identifier (CID
tag) is inserted into each frame at each network ingress LAN port. User frames that
are already tagged become double tagged. The CID tag is removed from the frame
at each network egress LAN port.
• Ports forward only those frames that have a CID tag which "belongs" to that port
(i.e. which has previously been provisioned on that port).
In the VPN tagging mode, the term "LAN group" is synonymously used to the term
"virtual switch".
Configuration rules and guidelines
Please observe these configuration rules and guidelines:
• Be aware that the port role of the LAN and WAN ports is fixed (see above):
– LAN ports are always customer role ports.
– WAN ports are always network role ports.
• On LAN ports the CID needs to be provisioned manually.
• The CID provisioned on each LAN port must be unique within a shared WAN to
create a fully independent VPN.
The VPN provisioning on the WAN ports is done automatically by means of the
proprietary spanning tree with VPN registration protocol (STVRP).
Repeater mode
A virtual switch in repeater mode consists of exactly one LAN port and one WAN port
in a fix 1:1 relationship. All Ethernet frames entering the virtual switch at a LAN port
are transparently forwarded to the corresponding WAN port and transported over the
network. None of the standard IEEE Std 802.1D/Q processes (MAC address learning,
MAC frames forwarding, and filtering, VLAN classification, and filtering) applies.
Received frames are relayed to the other port of the virtual switch, irrespective of their
format or contents.
The WAN port that supports the Repeater mode requires the provisioning of the
following parameters:
• WAN port capacity (require manual provisioning) at 2, 4, 6, 8, 10, 50 or 100
Mbit/s
• association of the WAN port to a LAN port
• create cross-connections between VC-X and TU-X (where X=12 or 3).
The following figure shows the network element configured in the Repeater operation
mode.
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8-60
"Flexible port role assignment" (p.
Alcatel-Lucent - Proprietary
See notice on first page
8-77)).
Operational modes
365-312-807R7.2
Issue 4, May 2007