Specifications

Installation and Operation Manual Chapter 1 Introduction
ASMi-54C LRS-102 Ver. 2.0 Functional Description 1-11
• SHDSL Ethernet switch: a layer 2 switch that handles the traffic directed to
SHDSL lines, through the PCS ports (the traffic handled by this switch is
forwarded by the main Ethernet switch). Using a separate switch provides
the flexibility needed to operate the required number of PCS ports.
LRS-102 supports traffic and management flows. ASMi-54C bridge ports can also
serve the management flow. Unless specifically mentioned otherwise, in this
manual the term flow means traffic flow.
Main Ethernet Switch Capabilities
The function of the ASMi-54C main Ethernet switch is to route traffic between
external Ethernet ports and internal Ethernet ports, in accordance with the
configuration parameters specified by the user. The Ethernet switch fully
complies with the IEEE 802.3/Ethernet V.2 standards, and has full VLAN support
in accordance with IEEE 802.1Q and 802.1p. The switch has memory-based
switch fabric with true non-blocking switching performance. The switch collects a
wide range of performance monitoring parameters, which can be read by
management.
The Ethernet switch ports are used as follows:
• Connection to the ETH 1 and ETH 2 external port transceivers.
• Connection to the Ethernet switch serving the SHDSL subsystem, for
transferring the traffic directed through the PCS ports to the SHDSL lines
• One of the Fast Ethernet ports without transceivers is connected, via the
local management subsystem, to the management handling section of the
CL modules installed in the LRS-102 (this section is available on all CL
modules). One management port connects to the ASMi-54C local
management subsystem.
Each switch port is supported by an independent MAC controller that performs all
the functions required by the IEEE 802.3 protocol. The frames passed by the MAC
controller are analyzed by the ingress policy controller of the corresponding port
before being transferred to an internal queue controller, which controls the
frame egress priorities and inserts them in separate queues. The queues are
connected to the ports through the port egress policy controllers. This approach
provides full control over traffic flow, and ensures that congestion at one port
does not affect other ports.
Ethernet Port Interfaces
The external Ethernet ports have 10/100 Mbps interfaces capable of
auto-negotiation. The user can configure the advertised data rate (10 or
100 Mbps) and operating mode (half-duplex or full-duplex). Alternatively,
auto-negotiation can be disabled, and the rate and operating mode be directly
specified.
The Ethernet ports can be ordered with one of the following types of interfaces:
• Sockets for SFP Fast Ethernet transceivers. RAD offers several types of
SFPs with optical interfaces, for meeting a wide range of operational
requirements (SFPs with copper interfaces are also available). The SFPs
are hot-swappable.
Note