Specifications

Installation and Operation Manual Chapter 1 Introduction
LA-210 Ver. 1.5 Functional Description 1-7
1.3 Functional Description
This section describes the major functional features of LA-210.
Interfaces
This section provides an overview over interfaces available on LA-210.
Ethernet Interface
The Ethernet physical interface is 10/100BaseT. The interface supports
autonegotiation.
WAN Interface
The SHDSL interface supports ITU-T G.991.2 and ETSI 101524 standards for
SHDSL.
Control Interface
The control port connects directly to an ASCII terminal for locally managing the
unit.
Ethernet Access (Bridge Mode)
LA-210 has a multi-port bridging capability handling up to six bridge ports. The
Bridge supports two modes of operation:
• VLAN-aware
• VLAN-unaware.
The mechanism of each mode can be described as five different processes:
• Ingress: Checks each frame entering the bridge to decide if and how this
frame should be passed on to the forwarding process
• Learning: Learns new MAC table entries (MAC only or MAC VID pairs)
• Aging: Checks the forwarding MAC table periodically
• Forwarding: Decides to which bridge port/ports to forward the frame
• Transmission (VLAN-aware mode only): Selects the format of the transmitted
frame at the output port: with VLAN ID (tagged) or without VLAN ID
(untagged).
Bridge features and these five processes are described below for each mode.
VLAN-Aware Mode
This mode enables the creation of sub-groups of bridge ports within the bridge.
Each sub-group is defined per VLAN and is associated with a unique VLAN ID
(VID). Frames containing a VID can be forwarded only between bridge ports that