Alcatel-Lucent 1643 AMS Applications And Planning Manual page 76

Network Topologies
LAN-ISP interconnect
An extension of the previous application is to have one LAN drop of a multi-point
LAN-to-LAN interconnection at the point of presence of an ISP (Internet Service
Provider), to provide for instance Internet access to the users in the company LANs.
Multiple customers sharing a WAN connection
To increase the efficiency of the bandwidth usage, it is possible to route the Ethernet
traffic of multiple end-users over the same SDH facilities. This feature is called
LAN-VPN and makes use of customer VPN tags, a tagging scheme derived from the
IEEE802.1Q VLAN standard to separate the traffic of the different users. Via the IEEE
802.1ad provider bridge mode it is additionally possible to use provider-defined tags
for different customers and thus to be independent from customer VPN tags. A
respective application is shown in the figure below.
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Multi-service application with the TransLAN
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