Alcatel-Lucent 1643 AMS User's Operation Manual page 421

Traffic provisioning
Configuration rules and guidelines
Please observe these configuration rules and guidelines:
• The port role of the LAN and WAN ports is fixed in the operational modes that
make use of the VPN tagging mode (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).
Important! Changing the tagging mode from transparent tagging to IEEE
802.1Q/IEEE 802.1ad VLAN tagging or vice versa is traffic affecting! Furthermore,
most objects provisioned in one mode will be deleted or reset to default - except
the LAN group / virtual switch infrastructure - when switching to the other mode.
IEEE 802.1Q VLAN tagging
IEEE 802.1Q VLAN tagging is used to identify end-user frames in the STP virtual
switch mode compliant with IEEE 802.1Q.
These are the IEEE 802.1Q VLAN tagging rules:
• On end-user LAN interfaces:
– At each network ingress port, untagged user frames are tagged with a default
– At each network egress port, the port VLAN identifier (PVID) is removed from
• On trunking LAN interfaces, all tagged frames are forwarded in both directions.
Untagged frames are discarded (dropped).
• The end-customer VLAN tag sets have to be disjunct.
IEEE 802.1ad VLAN tagging
The IEEE 802.1ad VLAN tagging mode ("provider bridge tagging mode") is a double
tagging mode with provisionable Ethertype (TPID), used to identify end-user frames in
the STP virtual switch mode compliant with IEEE 802.1ad ("provider bridge mode").
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Issue 4, May 2007
identifier, the port VLAN identifier (PVID) which is removed from the frame at
the network egress port.
Already tagged frames are forwarded if their VLAN identifier is in the port's
static or dynamic list of VLAN IDs, i.e. if the port belongs to the configured
port member set for that VLAN ID. The static VLAN ID list is configurable.
The dynamic VLAN ID list is automatically generated by making use of the
GARP VLAN Registration Protocol (GVRP).
previously untagged frames that were tagged with the PVID at the ingress port.
VLAN tagged frames are forwarded if the port belongs to the configured port
member set for the respective VLAN ID.
Alcatel-Lucent - Proprietary
See notice on first page
Tagging modes
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