[Top] [Prev] [Next] [Bottom]

Using SDSL

This document describes the software for the Symmetric Digital Subscriber Line (SDSL) module. It has the following sections.

Overview of SDSL

Setting Up SDSL

Testing or Monitoring the SDSL Module

SDSL Commands

Overview of SDSL

DSL (Digital Subscriber Line) is a technology for bringing high-bandwidth information to homes and small businesses over ordinary copper telephone lines.

Interoperability

This SDSL implementation is designed to work with Copper Mountain Networks, Inc. Digital Subscriber Loop Access Multiplexor (DSLAM) equipment. The SDSL module meets all interoperability requirements for Copper Mountain Networks Customer Premise Equipment (CPE).

Features

The SDSL module contains its own microprocessor to run SDSL interface functions locally.

The SDSL module supports two of Copper Mountain's CPE modes:

Q.922 Frame Relay. In this mode, SDSL uses Q.922-encoded frames and supports contiguous DLCIs, starting at 16.
Raw SDSL (PPP). In this mode, SDSL uses PPP-in-HDLC framing, as specified in RFC 1662.

Limitations

The SDSL module is compatible only with the Copper Mountain Networks DSLAM equipment and services. The SDSL module does not support the Copper Mountain DSL Multi-Link Protocol (DML).

Setting Up SDSL

The SDSL module runs Frame Relay by default. There are no SDSL-specific configuration commands, but you can use the following commands to enable or disable the module or change the data-link protocol.

1. To see a list of hardware devices installed in your router, enter list devices at the Config> prompt. To see a list of interfaces, enter list interfaces at the Config> prompt.

2. The SDSL interface is enabled by default. To disable or re-enable it, use the disable interface or enable interface commands at the at the Config> prompt.

Config>enable interface
Interface Number [0]?  1

3. Set the data-link to run over the SDSL module to PPP or Frame Relay. By default, the data-link is set to Frame Relay.

Config>set data-link ppp
Interface Number [0]? 1

Testing or Monitoring the SDSL Module

There are SDSL commands available at the router's monitoring prompts that let you test or monitor the status of the module. See SDSL Commands for a description of these commands.

In addition to the SDSL monitoring commands, you can use the following commands at the + prompt. To display the + prompt, enter monitor at the * prompt.

Command Function

Clear Clears SDSL statistics on specific interfaces.

Disable Device Closes any existing physical connection and causes the router to not try to re-open the connection.

Disable Interface Closes any existing data-link connections, but does not close physical connections.

Enable Device Causes the router to try to re-establish the physical connection.

Enable Interface Causes the router to try to re-establish data-link connections.

List Device Shows the status of physical devices on the router.

List Error Shows a summary of error statistics for each device and interface on the router.

Test Device Closes any existing physical connections and causes the router to try to re-activate physical connections. The test is successful if the router is able to establish the physical connection.

Test Interface Closes any existing data-link connections and causes the router to try to re-activate any data-link connections associated with this interface. The test is successful if the router is able to establish the data-link connection.

Command	Function
Clear	Clears SDSL statistics on specific interfaces.
Disable Device	Closes any existing physical connection and causes the router to not try to re-open the connection.
Disable Interface	Closes any existing data-link connections, but does not close physical connections.
Enable Device	Causes the router to try to re-establish the physical connection.
Enable Interface	Causes the router to try to re-establish data-link connections.
List Device	Shows the status of physical devices on the router.
List Error	Shows a summary of error statistics for each device and interface on the router.
Test Device	Closes any existing physical connections and causes the router to try to re-activate physical connections. The test is successful if the router is able to establish the physical connection.
Test Interface	Closes any existing data-link connections and causes the router to try to re-activate any data-link connections associated with this interface. The test is successful if the router is able to establish the data-link connection.

Displaying the DSL Prompt

To display the DSL <WAN#> prompt,

1. Enter network followed by the number of the interface you want to monitor. To see a list of interfaces, enter list interfaces at the Monitor> prompt.

Monitor>network 1
Circuit <NET-1>

2. Enter sl at the Circuit <NET-#> prompt.

Circuit <NET-1> sl
Serial Line Console

Serial Console <WAN1>

3. Enter dsl at the Serial Console <WAN#> prompt.

Serial Console <WAN1> dsl
DSL User Console

DSL <WAN1>

SDSL Commands

This section describes the SDSL commands. There are no SDSL-specific commands in the router's configuration area. These SDSL commands are available at the DSL monitoring prompt (DSL <WAN>), and they take affect as soon as you enter them.

Press SPACE twice after you type a command to display the available parameters for each command. Enter help for information about using the command line interface.

Table 1 SDSL Commands

Command Function

Disable [M] Disables the loopback modes available for the SDSL module.

Enable [M] Enables the loopback modes available for the SDSL module.

Exit [C] [M] 6 Returns to the previous prompt.

Statistics [M] Displays statistical information for the SDSL module.

Table 1 SDSL Commands
Command	Function
Disable [M]	Disables the loopback modes available for the SDSL module.
Enable [M]	Enables the loopback modes available for the SDSL module.
Exit [C] [M] 6	Returns to the previous prompt.
Statistics [M]	Displays statistical information for the SDSL module.

Disable [M]

Disables the loopback modes available for the SDSL interface.

Syntax: disable

local_loopback
remote_loopback

local_loopback

Local Loopback, which is used for diagnostic purposes, loops traffic within the router so that the SDSL module is both the transmitter and the receiver.

Example: disable local_loopback

remote_loopback

Remote Loopback, which is used for diagnostic purposes, loops traffic between the SDSL module and the Central Office (CO) equipment.

Example: disable remote_loopback

Enable [M]

Enables the loopback modes available for the SDSL interface.

Syntax: enable

local_loopback
remote_loopback

local_loopback

Local Loopback, which is used for diagnostic purposes, loops traffic within the router so that the SDSL module is both the transmitter and the receiver.

Example: enable local_loopback

remote_loopback

Remote Loopback, which is used for diagnostic purposes, loops traffic between the SDSL module and the Central Office (CO) equipment.

Example: enable remote_loopback

Exit [C] [M]

Returns to the previous prompt.

Syntax: exit

Example: exit

Statistics [M]

Displays statistical information for the SDSL module. The information displayed depends on your Digital Subscriber Loop Access Multiplexor (DSLAM). Currently the SDSL supports only the Copper Mountain Networks SDLAM equipment.

Syntax: statistics

Example: statistics

                         Copper Mountain SDSL
                         Line Statistics
   Card State: Up
   Line State: Activation
   Line Speed: 1568 Kbps
   Failed training attempts (since last activation): 0 
   Bitpump firmware revision: 4.3  
   MCU firmware revision: 0.6
   DSLAM chassis number: 1
   DSLAM slot number: 4
   DSLAM port number: 24
   DSLAM working MAC addr: <unassigned>


Card State	The operational state of the SDSL firmware, either up or down.
Line State	The current state of the SDSL module. The possible states are Disconnected—There is no current communication with the DSLAM. Pre-activation—The SDSL module is speed training with the DSLAM. Training Complete—The SDSL module has finished speed training, and is attempting activation. Activation—The SDSL module has reached activation with the DSLAM, and is ready for data transfer.
Line Speed	If the line state is activated, this shows the operating speed.
Failed training attempts (since last activation)	The number of failed speed training and/or activation attempts since the last successful speed training/activation.
Bitpump firmware revision	The version of a firmware component on your SDSL module. You may need to know this revision level in cases of troubleshooting or upgrading your router.
MCU firmware revision	The version of a firmware component on your SDSL module. You may need to know this revision level in cases of troubleshooting or upgrading your router.

When the SDSL module connects to the DSLAM, the DSLAM reports the following information. This information may be useful to your SDSL service provider when troubleshooting problems.

DSLAM chassis number

The chassis number to which this SDSL module is connected.

DSLAM slot number

Within the chassis, the slot number to which this SDSL module is connected.

DSLAM port number

Within the slot, the port number to which this SDSL module is connected.

DSLAM working MAC addr

The MAC address that the DSLAM assigned, if any. The network model configured at the DSLAM determines whether or not the DSLAM assigns a MAC address.

DSLAM chassis number	The chassis number to which this SDSL module is connected.
DSLAM slot number	Within the chassis, the slot number to which this SDSL module is connected.
DSLAM port number	Within the slot, the port number to which this SDSL module is connected.
DSLAM working MAC addr	The MAC address that the DSLAM assigned, if any. The network model configured at the DSLAM determines whether or not the DSLAM assigns a MAC address.

[Top] [Prev] [Next] [Bottom]