Alcatel-Lucent 1643 AMS User's Operation Manual page 377

Traffic provisioning
B
C
D
X4IP-V2 option card (TransLAN®)
The TransLAN
frames over the SDH network. The Ethernet over SDH (EoS) method and the generic
framing procedure (GFP) are used to encapsulate the Ethernet frames into the SDH
transmission payload. Virtual concatenation and LCAS are used to allocate a flexible
amount of WAN bandwidth for the transport of Ethernet frames as needed for the
end-user's application.
The Ethernet Interface extension card contains four 10/100BaseT Ethernet ports (LAN
ports). The LAN ports automatically determine the speed of the network, whether it is
10BaseT or 100BaseT.
The physical L2 switch that is present on an Ethernet Interface extension card can be
split into several logical or virtual switches. A Virtual Switch is a set of LAN/WAN
ports on an Ethernet Interface extension card that are used by different VLAN's which
can share the common WAN bandwidth. Each of the virtual switches can operate in a
specific Virtual Switch mode depending on the VLAN tagging scheme.
First the VLAN tagging mode has to be specified on Ethernet Interface extension card
level, this can be either IEEE 802.1Q VLAN tagging or VPN-tagging (Transparent). In
VPN tagging (Transparent) mode, the end-user 802.1Q VLAN tags that optionally may
appear in the end user traffic are ignored in the forwarding process. These VLAN tags
are carried transparently through the SDH network. In IEEE 802.1Q VLAN-tagging
mode, the VLAN tags are also carried transparently, but the VLAN ID in the VLAN
tags is used in the forwarding decision. Therefore end user VLAN IDs must be unique
per physical switch.
....................................................................................................................................................................................................................................
365-312-807R7.2
Issue 4, May 2007
The interface between the Ethernet physical interface port and
the Ethernet switch. The internal interfaces of the Ethernet
switch towards the Ethernet physical interface port are referred
to as "LAN ports". Note that two types of LAN ports can be
differentiated according to their port role: "customer LAN
ports" and "network LAN ports" (cf.
(p. 8-76)).
The internal interface between the Ethernet switch and the
encapsulation and mapping function. The internal interfaces of
the Ethernet switch towards the encapsulation and mapping
function are referred to as "WAN ports". Note that two types
of WAN ports can be differentiated according to their port role:
"network WAN ports" and "customer WAN ports" (cf.
provisioning" (p.
The interface between the encapsulation and mapping function
and the cross-connect function of the network element. This is
were the virtually concatenated payload is cross-connected to
be transported over the SDH network.
®
implementations use standardized protocols to transport Ethernet
Alcatel-Lucent - Proprietary
See notice on first page
"Port provisioning"
8-76)).
Ethernet over SDH
"Port
8-25