Compatible Systems DS3 User Manual

DS3- Quad 10/100 RIOP Installation Guide
Compatible Systems Corporation
4730 Walnut Street
Suite 102
Boulder, Colorad o 80301
303-444-9532 800-356-0283
http://www.compatible.com
All rights reserved. VSR, VSR-2, MicroRouter and CompatiView are trademarks of Compatible Systems Corporation. Other trademarks are the property of their respective holders.
FCC Notice: This product has been certified to comply with the limits for a Class A computing device, pursuant to Subpart J of Part 15 of FCC Rules. It is designed to provide reasonable protection against radio or television communication interference in a commercial environment. Operation of this equipment in a residential area could cause interference with radio or television communication.
Table of Contents
Introduction to the DS3-Quad 10/100 RIOP 1 Chapter 1 - Network Installation 2
Connecting the DS3-Quad 10/100 to the Ethernet 2 DS3 Line Connection Requireme nts 2 Connecting the DS3-Quad 10/ 100 to a DS3 Line 3 Connecting a Management Console 3 Powering Up the Router 3
Chapter 2 - Quickstart Instructions 4
ETHERNET INTERFACE CONFIGURATION 4
IP Protocol 4
Required for IP 4 Suggested for IP 5
IPX Protocol 5
Required for IPX 5 Suggested for IPX 5
AppleTalk Protocol 5
Required for Apple Talk 5 Suggested for AppleTalk 5
DECnet Protocol 5
Required for DECnet 5 Suggested for DECnet 6
WAN INTERFACE CONFIGURATION 6
Internal DS3 CSU/DSU Physical Communications Settings 6
Required for Dedicated Line Operation 6 Suggested for Dedicated Line Operation 6
PPP Configuration 6
Internal DS3 CSU/DSU Link Configuration 6
Required for Dedicated Line Operation 6 Suggested for Dedicated Line Operation 6
IP Protocol 6
Required for IP 6 Suggested for IP 6
IPX Protocol 7
Required for IPX 7
AppleTalk Protocol 7
Required for Apple Talk 7
DECnet Protocol 7
Required for DECnet 7
Frame Relay Configuration 7
Internal DS3 CSU/DSU Link Configuration 7
Required for Dedicated Line Operation 7 Suggested for Dedicated Line Operation 8
Frame Relay DLCI Mappings 8
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Table of Contents
IP Protocol 8
Required for IP Numbered Interface 8 Required for IP Unnumbered Interface 8 Suggested for IP 8
IPX Protocol 9
Required for IPX 9 Suggested for IPX 9
AppleTalk Protocol 9
Required for Apple Talk 9 Suggested for AppleTalk 9
DECnet Protocol 9
Required for DECnet 9
SMDS Config ur ation 10
Link Configuration 10
Suggested for Dedicated/Leased Line Operation 10
SMDS Addressing 10
AVING A CONFIGURATION FILE TO FLASH ROM 10
S
Chapter 3 - Shipping Defaults 11
Ethernet Interface s 11
IP Routing Defaults 11 IP Bridging Defaults 11 IPX Routing Defaults 11 IPX Bridging Defaults 11 AppleTalk Routing Defaults 11 AppleTalk Bridging Defaults 11 DECnet Defaults 11
WAN Interface 11
IP Defaults 11 IPX Defaults 11 AppleTalk Defaults 11 DECnet Defaults 11 DS3 CSU/DSU Defaults 11
Chapter 4 - LED Patterns 12
ROUTER LED PATTERNS 12
Over Temp 12 Sys Ready 12 General Indicators 12
DS3-QUAD 10/100 RIOP LED PATTERNS 13
Ethernet Traffic Indicators 13 DS3 Indicators 13 Ethernet Connection Indicators 13 DS3 Connection Indicators 13
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Introduction to the DS3-Quad 10/100 RIOP 1

Introduction to the DS3-Quad 10/100 RIOP

The DS3-Quad 10/100 Routing Input/Output Processor (RIOP), as part of the VSR multigi­gabit switching router, allows you to connect a remote corporate network and up to four local Ethernet segments. The DS3 interface has a data capacity of 44.736 Mbps, while the Ethernet interfaces can operate at either 10 Mbps or 100 Mbps.
This section of the manual contains information specific to the DS3-Quad 10/100 RIOP. It is divided into the following sections:
Chapter 1: Network Installation
Here you will find st ep- by-step instructions o n ho w to p hys i cal ly i ns tal l t he DS 3-Qu ad 10/100 and connect it to your network.
Chapter 2: Quickstart Configuration
The Quickstart section provides a basic list of parameters that must be entered into the DS3-Quad 10/100 for proper operation.
Chapter 3: Shipping Defaults
This section of the manual lists factory defaults for each interface.
Chapter 4: LED Patterns
This section of the manual describes the LED indicators for the DS3-Quad 10/100.
Chapter 1 - Network Installation 2

Chapter 1 - Network Installation

DS3-Quad 10/100 RIOP Front Panel
This section of the manual will help you install the DS3-Quad 10/100 RIOP to connect a local Ethernet and remote corporate network. These connections can be made to other Compatible Systems routers or routers from other vendors.
In summary, the steps for installation are:
1. After mounting the router or placing on a desktop, make sure it is not connected to any power source.
2. Connect the router to the Ethernet network.
3. Connect the router to the DS3 transmission equipment.
4. Connect a management console to the router (optional).
5. Plug in the power cable and power up the router.

Connecting the DS3-Quad 10/100 to the Ethernet

The 10/100 Ethernet interfaces directly support 100BaseTx or 10BaseT twisted-pair Ethernet. To connect one of the router’s Ethernet interfaces to twisted-pair Ethernet cabling, you will need an unshielded twisted-pair station cable that is already connected ible twisted-pair hub (for a transmit speed of 10 Mbps) or a 100Mbps Fast Ethernet hub (for a transmit speed of 100 Mbps).
v
Note: Ethernet cables and cable connectors are not supplied with the DS3-Quad 10/100
RIOP product. Category 5 cabling is required for 100 BaseT operation. Please contact your reseller or your Compatible Systems representative for information on obtaining the correct Ethernet cabling supplies .
To connect the router to the twisted-pair network, simply plug the twisted-pair cable into the RJ-45 Ethernet connector on the front of the unit.

DS3 Line Connection Requirements

The DS3-Quad 10/100 RIOP includes an integrated DS3 C SU/DSU. To connect this interface to your DS3 transmission equipment, you will need two coaxial cables.
These cables require special tools to be built correctly. You can use your approved cable supplier or you can contact your reseller or your Compatible Systems representative for a list of cable suppliers. To have a cable built, use the following specifications:
Cable Type: AT&T type 734A or equivalent
Connector Type: AMP Incorporated 413589-7 or equivalent (75 Ohm BNC plug)
Maximum L ength: 900 feet
to a 10BaseT-compat-
Chapter 1 - Network Installation 3
v Note: The DS3-Quad 10/100 RIOP includes loopback features which can be used to check the functionality of your DS3 line. Before attempting to route network traffic, use these features to check the line’s basic integrity.

Connecting the DS3-Quad 10/100 to a DS3 Line

The DS3 line port consists of two 75 ohm BNC female coaxial connectors labeled DS3 XMT and DS3 RCV. To connect the router to the DS3 line, you need two AT&T type 734A or equiv­alent coaxial cables.
Install one cable between the routers DS3 XMT connector and the RCV connector on the DS3 transmission equipment. Install the other cable between the router’s DS3 RCV connector and the XMT connector on the DS3 transmission equipment.

Connecting a Management Console

If you wish to connect an out-of-band management console, use the supplied DB-25 male to DB-25 female console cable and connect to the Console interface on the DS3-Quad 10/100 RIOP. You can use a dumb terminal or a computer equipped with VT100 terminal emulation.
The default settings for the Console interface are VT100 terminal emulation, 9600 bps, 8 bits, no parity, 1 stop bit and no Flow Control.
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Note: The DS3-Quad 10/100 RIOP also has an AUX interface. This is a modem connection
which should only be used in consultation with Compatible Systems Technical Support staff, who will provide instruction on its use.

Powering Up the Router

Connect the supplied power cord to the front of the VSR and set the power switch to “On.” At power-up, the router will take approximately one minute to become visible to CompatiView.
v
Note: If you want to use Telnet as a management method, you must first configure an IP
address into the router with an out-of-band console, or reconfigure the IP address on an IP host or workstation on the same Ethernet segment as the router. See the appropriate VSR chassis section of the manual for more information on Command Line Management.
Chapter 2 - Quickstart Instructions 4

Chapter 2 - Quickstart Instructions

This Quickstart chapter briefly discusses the major parameters that must be set in order to use the DS3-Quad 10/100 RIOP as part of your VSR multigigabit switching ro uter.
Detailed information on the meaning of the routers parameters is provided in the Compa-
tiView Management Software Reference Guide and the Text-Based Configuration and Command Line Management Reference Guide. You should use this chapter as a starting point
to look up more specific information in the other document s. If you need more general information on IP, IPX, AppleTalk or wide area protocols, see the
Appendices in the CompatiView Management S oftware Reference Guide. There are a number of parameter settings which are optional, in the sense that they are not
required for all installations. These settings are not covered in this chapter. In this chapter:
CV = CompatiView TB = Text-Based Configuration
In order to successfully connect to an Internet Service Provider (ISP), you must use router configuration parameters which will be provided by the technical staff of the ISP. These parameters must include all IP addresses, WAN settin gs and any applicable aut hor ization routines. Please check with your ISP before changing the configuration of your DS3-Quad 10/100 RIOP.
v
Note: This Quickstart does not include information on setting up packet filters for using the
router as a Firewall. Se e the CompatiView Management Software Reference Guide or Text-Based Configuration and Command Line Management Reference Guide regarding IP packet filters for more information.

Ethernet Interface Confi guration

Ethernet interfaces are considerably easier to set up than WAN interfaces since there are fewer choices that need to be made regarding commu ni cati ons protocols and parameters. We recom­mend that you begin by configuring any Ethernet interface parameters before proceeding to configure WAN interface parameters.

IP Protocol

Required for IP
These parameters set the basic address characteristics of the interface. They provide enough information for another IP node to find the interface (such as a Telnet client), but not enough information for routing to take place.
IP address
IP subnet mask
IP broadcast address
CV: Use the TCP/IP Routing: Ethernet Dialog Box to set these parameters. TB: Use the configure command and the IPAddress, SubnetMask, and IPBroadcast
keywords in the IP Ethernet 0 (and/or other port numbers you wish to configure) section.

IPX Protocol

Chapter 2 - Quickstart Instructions 5
Suggested for IP
These parameters help supply information a bout the segment that the interface is connected to. With this information, routing can take place.
Set IP RIP 1, IP RIP 2 or OSPF (Open Shortest Path First)
Set IP static routes
CV: Use the TCP/IP Routing: Ethernet Dialog Box to set RIP, and the IP Static Routing Dialog Box (under Global/IP Static Routes) to set static routes. OSPF can only be configured using text-based configuration.
TB: Use configure and set either the RIPVersion keyword or the OSPFEnabled keyword for the IP Ethernet 0 (and/or other port numbers yo u w ish to co nfi gu re) s ectio n. Use edit config and add static routes in the IP Static section.
Required for IPX
Generally, there are no required changes from the shipping Ethernet configuration for IPX. The Ethernet interface will autoconfigure to use the two most common IPX frame types, and will adapt to conditions on the Ethernet.
Suggested for IPX
You may want to set your own network numb ers , rat her than using the autoconfigured values. You may also want to turn off unused frame types.
CV: Use the IPX Routing: Ethernet Dialog Box. TB: Use configure and set keywords in the IPX Ethernet 0 (and/or other port numbers you
wish to configure) section.

AppleTalk Protocol

Required for AppleTalk
There are generally no required changes from the shipping Ethernet configuration for Apple­Talk. The Ethernet interface will autoconfigure to use AppleTalk Phase 2, and will adapt to conditions on the Ethernet.
Suggested for AppleTalk
You may want to set your own network numb ers , rat her than using the autoconfigured values. You may also want to use more meaningful zone names.
CV: Use the AppleTalk Routing: Ethernet Dialog Box. TB: Use configure and set keywor ds in the AppleTalk Phase 2 Ethernet 0 (and/or other port
numbers you wish to configure) section.

DECnet Protocol

Required for DECnet
The routers shipping configuration does not have DECnet turned on. In order to be used, DECnet must be turned on both globally and for a particular port.
Set DECnet on (globally, and for this port)
Set DECnet area
Set DECnet node
CV: Use the DECnet Routing Dialog Box (under Global/DECne t Routing) and the DECnet: Ethernet Dialog Box.
TB: Use configure and set the Mode keyword in the DECnet Ethernet (and/or other port
Chapter 2 - Quickstart Instructions 6
numbers you wish to configure) section. Use configure and set the Enabled, Area, and Node keywords in the DECnet Global section.
v
Note: Setting DECnet on for any port with the command line also sets DECnet on globally.
In CompatiView you must set a global parameter and a port-specific parameter.
Suggested for DECnet
Setting the parameters above should be adequate for most installations.

WAN Interface Configuration

In order to use the WAN interface, you may want to set some physical parameters. Then set up the link and protocol parameters.

Internal DS3 CSU/DSU Physical Communications Settings

Required for Dedicated Line Operation
No changes from the default values are required for standard operation over a DS3 line. The default values are listed in Chapter 3.
Suggested for Dedicated Line Operation
Changing to a different Line Build Out may be required. These parameters can only be set using the command line interface.
TB: Use configure and the DS3 Interface WAN 0 section.

PPP Configuration

This section covers the settings required for PPP (point-to-point) protocol operation of the DS3 WAN interface.
Internal DS3 CSU/DSU Link Configuration
Required for Dedicated Line Operation
This is the only mode of operation supported via the built-in DS3 CSU/DSU.
Set Dedicated connection
Set PPP connection
CV: Use the Link Configuration: WAN Dialog Box. TB: Use configure and then set the Mode and ConnectMode keywords in the Link Config
WAN 0 section.
Suggested for Dedicated Line Operation
Dedicated line operation generally does not require additional parameters for operation.
IP Protocol
Required for IP
WAN interfaces which are set for PPP operation do not generally use an IP address. They are set to act as an unnumbered interface. In this mode of operation, there are no required settings.
Suggested for IP
These parameters help supply information a bout the segment that the interface is connected to. With this information, routing can take place.
Set IP RIP 1, IP RIP 2, OSPF (Open Shortest Path First) or BGP (Border Gateway
IPX Protocol
Chapter 2 - Quickstart Instructions 7
Protocol)
Set IP static routes
CV: Use the TCP/IP Routing: WAN Dialog Box to set RIP, and the IP Static Routing Dialog Box (under Global/IP Static Routes) to set static routes. OSPF and BGP can only be config­ured using text-based configuration.
TB: Use configure and set either the RIPVersion keyword or th e OSPFEnabled keyword in the IP WAN 0 section. Add static routes and a default router using the edit config IP Static command.
v
Note: Due to the complexity of BGP, configuration parameters for BGP ar e no t given in this
Quickstart. For help with BGP configuration parameters, and other configuration questions, refer to the Tech Support pages on the Compatible Systems Web site at:
http://www.compatible.com/.
Required for IPX
WAN interfaces which are set for PPP operation do not generally use an IPX address. They are set to act as an unnumbered interface. In this mode of operation, there are no required settings.
AppleTalk Protocol
Required for AppleTalk
WAN interfaces which are set for PPP operation do not generally use an AppleTalk address. They are set to act as an unnumbered interface. In this mode of operation, there are no required settings.
DECnet Protocol
Required for DECnet
The routers shipping configuration does not have DECnet turned on. In order to be used, DECnet must be turned on both globally and for a particular port.
Set DECnet on (globally, and for a port)
Set DECnet area
Set DECnet node
CV: Use the DECnet Routing Dialog Box (under Global/DECne t Routing) and the DECnet: WAN Dialog Box.
TB: Use configure and set the Mode keyword in the DECnet W AN 0 section. Us e configure and set the Enabled, Area, and Node keywords in the DECnet Global section.
v
Note: Setting DECnet on for any port with the command line also sets DECnet on globally.
In CompatiView you must set a global parameter and a port-specific parameter.

Frame Relay Configuration

This section covers the settings required for Frame Relay operation o f the DS3 WAN interface.
Internal DS3 CSU/DSU Link Configuration
Required for Dedicated Line Operation
This is the only mode of operation supported via the built-in DS3 CSU/DSU.
Set Dedicated connection
Chapter 2 - Quickstart Instructions 8
Set Frame Relay connection
CV: Use the Link Configuration: WAN Dialog Box. TB: Use configure and then set the Mode
WAN 0 section.
Suggested for Dedicated Line Operation
Dedicated line operation generally does not require additional parameters for operation.
Frame Relay DLCI Mappings
If you are connecting to another Compatible Systems router, this information is not required for Frame Relay operation. Compatible Systems uses IARP (Inverse Address Resolution Protocol) to dynamically generate this information. To connect to other vendors routers which do not support IARP, you must provide DLCI-to-protocol mapping information.
v
Note: Many Internet Service Providers (ISP’s) do not support IARP as a default. If your
WAN interface will be connected to an ISP via Frame Relay, check with your ISP technical staff on whether or not you must manually enter DLCI information.
CV: Use the DLCI Mapping Database window. TB: Use configure and set the DLCI keyword in the Frame Relay WAN 0 section.
IP Protocol
There are two ways to set up Frame Relay. One is to set the WAN interface as a “numbered interface. This means that the interface (and thus the Frame Relay network) will have an IP address, subnet mask, etc. The other is to set it as an unnumbered interface and specify that the link is point-to-point Frame Relay and set the local DLCI. Unnumbered Frame Relay can only be configured using text-based configuration. Instructions are provided for both options.
and ConnectMode keywords in the Link Config
Required for IP Numbered Interface
IP numbered interface
IP address
IP subnet mask
IP broadcast address
CV: Use the TCP/IP Routing: WAN Dialog Box. TB: Use the configure command and the Numbered, IPAddress, SubnetMask, and
IPBroadcast keywords in the IP WAN 0 section.
Required for IP Unnumbered Interface
IP unnumbered interface
Point-to-Point Frame Relay
Local DLCI
TB: Use the configure command and the Numbered, PointToPointFrame and Inter­faceDLCI keywords in the IP WAN 0 section.
Suggested for IP
These parameters help supply information a bout the segment that the interface is connected to. With this information, routing can take place.
Set IP RIP 1, IP RIP 2, OSPF (Open Shortest Path First) or BGP (Border Gateway Protocol)
IP static routes
CV: Use the TCP/IP Routing: WAN Dialog Box to set RIP, and the IP Static Routing Dialog
IPX Protocol
Chapter 2 - Quickstart Instructions 9
Box (under Global/IP Static Routes) to set static routes. OSPF and BGP can only be config­ured using text-based configuration.
TB: Use configure and set either the RIPVersion keyword or th e OSPFEnabled keyword in the IP WAN 0 section. Add static routes and a default router using the edit config IP Static command.
v
Note: Due to the complexity of BGP, configuration parameters for BGP ar e no t given in this
Quickstart. For help with BGP configuration parameters, and other configuration questions, refer to the Tech Support pages on the Compatible Systems Web site at:
http://www.compatible.com/.
Required for IPX
Frame Relay operation requires that the WAN interface be set as an IPX numbered inter­face. This means that the interface (and thus the Frame Relay network) must have an IPX network number.
IPX numbered interface
IPX network number
CV: Use the IPX Routing: WAN Dialog Box. TB: Use configure and set the Numbered and Net keywords in the IPX WAN 0 section.
Suggested for IPX
The settings above are all that is generally required for IPX operation over Frame Relay.
AppleTalk Protocol
Required for AppleTalk
Frame Relay operation requires that the WAN interface be set as an AppleTalk “numbered interface. This means that the interface (and thus the Frame Relay network) must have an AppleTal k network number and an AppleTalk node number.
AppleTal k numbered interface
AppleTalk network number
AppleTalk node numbe r
AppleTal k zone name
CV: Use the AppleTalk Routing: WAN Dialog Box. TB: Use configure and set the Numbered, NetLower, and DefZone keywords in the Apple-
Talk WAN 0 section.
Suggested for AppleTalk
The settings above are all that is generally required for AppleTalk operation over Frame Relay.
DECnet Protocol
Required for DECnet
In order to be used, DECnet must be turned on both globally and for a particular port. WAN interfaces which are set for Frame Relay operation do not need any additional parame-
ters set in order to function.
Set DECnet on (globally, and for this port)
CV: Use the DECnet Routing Dialog Box (under Global/DECne t Routing) and the DECnet: WAN Dialog Box.
TB: Use configure and set the Mode keyword in the DECnet WAN 0 section. v
Note: Setting DECnet on for any port with the command line also sets DECnet on globally.
In CompatiView you must set a global parameter and a port-specific parameter.

SMDS Configuration

This section covers the settings required for SMDS (Switched Multi-megabit Data Service) operation of the DS3 WAN interface (IP only). SMDS is a connectionless, packet-switched service that offers LAN-to-LAN connectivity across a wide area at up to 1.544 Mbps. SMDS addresses and other parameters can only be set using the command line interface.
v
Note: The IP protocol settings and the physical communication settings are the same as they
would be for Frame Relay operation. The only parameters which sh ould be set differently for SMDS are the Link Configuration and the SMDS addressing section.
Link Configuration
SMDS is presently supported in the DS3-Quad 10/100 RIOP only via synchronous dedicated line operation.
Set Dedicated connection
Set SMDS connection
TB: Use configure to set the Mode section.
Chapter 2 - Quickstart Instructions 10
and ConnectMode keywords in the Link Config WAN 0
Suggested for Dedicated/Leased Line Operation
Dedicated line operation generally does not require additional parameters for operation.
SMDS Addressing
Many of these parameters will be given to you by your service provider. TB: Use configure and set the StationAddress, IPMulticast and PollingFrequency
keywords in the SMDS WAN 0 section.

Saving a Configuration File to Flash ROM

Once a configuration is complete, you can save it to the routers Flash ROM. Until saved, all changes are made in a separate buf f e r an d th e actual r outer interfaces co ntinue to r un as before the changes were made.
CV: Use the Save to/Device option from the File menu. TB: Use the save command.
Chapter 3 - Shipping Defaults 11

Chapter 3 - Shipping Defaults

Ethernet Interfaces

IP Routing Defaults

Off, all interfaces

IP Bridging Defaults

On, all interfaces
Address: 198.41.12.1
Subnet Mask: 255.255.255.0
Broadcast Address: 198.41.12.255
IP RIP off

IPX Routing Defaults

802.3 on, autoseeding, all interfaces
802.2 on, autoseeding, all interfaces
Type II on, nonseeding
802.2 SNAP on , nonseeding

IPX Bridging Defaults

Off, all interfaces

WAN Interface

AppleTalk Routing Defaults

Phase I off, all interfaces
Phase II on, autoseeding, all interfaces

AppleTalk Bridging Defaults

Off, all interfaces

DECnet Defaults

Off, all interfaces

IP Defaults

On
Unnumbered interface
RIP off
Van Jacobson compression off

IPX Defaults

On
Unnumbered interface

AppleTalk Defaults

On
Unnumbered interface

DECnet Defaults

Off

DS3 CSU/DSU Defaults

PPP
16 bit CRC
Chapter 4 - LED Patterns 12

Chapter 4 - LED Patterns

Some of the LEDs on the front of the VSR multigigabit switching router serve dual functions. In addition to indicating certain router-wide operating conditions, they can also display port-specific information.
v
Note: Any continuous flashing pattern not noted in this chapter may be caused by a hard-
ware failure. Please call Compatible Systems Technical Support if your router shows a hard­ware failure.

Router LED Patterns

The following LEDs and li ght pat terns provid e info rmation about t he VSR’s physical state and operating conditions.

Over Temp

The router is above the proper operating temperature. The filter needs changing. See the appropriate VSR chassis section of the manual for instructions.

Sys Ready

The router booted properly without detecting any failures.

General Indicators

Ethernet Lights DS3 Lights Indication
5 flashing 1 flashing Router stacks starting up. 3&4 flashing 2&3 flashing No OS loaded. Running from ROM. 1&4 flashing 2&5 flashing Erasing OS in Flash ROM.
5 flashing 1,2&3 flashing Erasing config in Flash ROM.
1 - 5 scanning 5 - 1 scanning Flash ROM erase due to switch setting five or six is
complete. Set switch to zero and cycle power.
Chapter 4 - LED Patterns 13

DS3-Quad 10/100 RIOP LED Patterns

The following LEDs and light patterns provide information about the DS3-Quad 10/100 RIOP interfaces.

Ethernet Traffic Indicators

Scan from 1 to 3: Ethernet transmit packet Scan from 5 to 3: Ethernet receive packet

DS3 Indicators

Scan from 1 to 3: WAN transmit packet Scan from 5 to 3: WAN receive packet

Ethernet Connection Indicators

Link: The Link light indicates that there is a good connection to the hub. Activity: The Activity light indicates that there is activity across the link. 100: The 100 light indicates that the interface is operating at 100 Mbps.

DS3 Connection Indicators

TX: WAN transmit packet RX: WAN receive packet Link: The Link light indicates that the interface is receiving signal from the upstream terminal.
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