Alcatel-Lucent 1643 AMS Applications And Planning Manual page 181

Ethernet Overview
Physical interfaces
The physical interface function provides the connection to the Ethernet network of the
end-customer. It performs auto-negotiation, and carries out flow control.
The following physical interfaces are enabled on Alcatel-Lucent TransLAN
• 10BASE-T
• 100BASE-TX
Important! It is recommended not to use flow control for 1000BASE-LX and
1000BASE-ZX interfaces located on the LKA12 unit.
The supported LAN interfaces for Ethernet and Fast Ethernet applications are
10BASE-T and 100BASE-TX. The numbers "10" and "100" indicate the bitrate of the
LAN, 10 Mbit/s ( Ethernet) and 100 Mbit/s (Fast Ethernet) respectively. The "T" or
"TX" indicates the wiring and the connector type: Twisted pair wiring with RJ-45
connectors.
Ethernet switch
The Ethernet switch connects the LAN ports with the WAN ports. It performs learning,
filtering and forwarding according to the IEEE 802.1D standard.
The physical Ethernet switch can be logically split in multiple, independent switches or
port groups, called "virtual switch". In the transparent tagging modes (LAN
interconnect, LAN-VPN or LAN-VPN with QoS), also the name "LAN group" is used
instead of "virtual switch".
The following applies to port groups or virtual switches, respectively:
• A virtual switch defines a spanning tree domain, and can be assigned a mode of
operation (LAN interconnect, LAN-VPN or LAN-VPN with QoS).
• A virtual switch includes any number (at least 2) of external Ethernet LAN ports
and/or internal WAN ports associated with a VC-n-Xv payload.
• Traffic between virtual switches is not possible.
• Each port can be a member of only one virtual switch at a time.
• A VLAN must have all its port members inside a single virtual switch.
In the following example, a virtual switch is provisioned that connects 2 LAN ports
with 1 WAN port:
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365-312-801R7.2
Issue 3, May 2007
Alcatel-Lucent - Proprietary
See notice on first page
Ethernet over SDH
®
cards:
11-5