Instruction/ maintenance manual of the product Cable ELSA
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Manual M ELSA MicroLink TM Cable.
© 1999 ELSA AG, Aachen (Germany) While the information in this manual has been compiled with great care, it may not be deemed an assurance of product characteristics. ELSA shall be liable only to the degree specified in the terms of sale and delivery.
Preface Thank you for placing your trust in this ELSA product. With the ELSA MicroLink Cable , you have chosen a modem that will open the door to the Internet for you with unparalleled speeds and remain online permanently.
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Content ELSA Cable Modem V English Content Introducing the ELSA MicroLink Cable ..................................................................... 1 The ELSA MicroLink Cable takes the stage ..........................................................
Content ELSA Cable Modem VI English Security for your LAN ............................................................................................ 30 Encryption ......................................................................................
Content ELSA Cable Modem VII English Status/IP-router-statistics ............................................................................... 83 Status/config statistics ..............................................................................
Content ELSA Cable Modem VIII English.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 1 Introducing the ELSA MicroLink Cable Internet access is the main application for the ELSA MicroLink Cable . The operator of the cable network to which you have connected your modem may offer additional services or regional information.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 2 ON This LED flashes once when the power supply is switched on. After the self-test, either an error is output by a flashing light code or the device starts and the LED remains lit. Standby This LED shows that the unit is in stand-by mode.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 3 LAN-Tx, -Rx, LAN-Coll, -Link These LEDs show the corresponding network controller status: Now turn the whole thing around and take a look at the rear.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 4 Node or hub? Please check the position of the Node/Hub switch when connecting the unit to the LAN: K As the factory default, the switch is set to 'Node'. In this setting, the device acts as a node on a network.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 5 Backbone Backbone : direct connection to the Internet The simple transfer rate between the network operator and participant does not by itself determine the speed at which the Internet can be accessed.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 6 Network operators can take advantage of this structure to provide regional content in addition to the Internet. This can be accomplished by setting up Web servers that do not need to be accessible from the Internet.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 7 CE conformity and FCC radiation standard CE This equipment has been tested and found to comply with the limits of the European Council Direc.
Introducing the ELSA MicroLink Cable ELSA MicroLink Cable 8.
Installation and configuration ELSA MicroLink Cable 9 English Installation and configuration The aim of this chapter is to get you online as quickly as possible.
Installation and configuration ELSA MicroLink Cable 10 English First Steps Give it some power First, give your device the power it needs through the power supply unit! Onto the net Connect the unit to your local network using the twisted pair cable.
Installation and configuration ELSA MicroLink Cable 11 English Quick Start: Quick configurations We're sure that after you've installed the hardware and software, you'll want to get going quickly without bothering with technical details.
Installation and configuration ELSA MicroLink Cable 12 English In this example, only one computer is connected to the Internet via the ELSA MicroLink Cable. In principle however, several computers can be connected to the ELSA MicroLink Cable, using a hub for example, if the network operator permits.
Installation and configuration ELSA MicroLink Cable 13 English The ELSA MicroLink Cable is now ready for use in bridge mode. Open your Web browser, and off you go into the Web with a whole new sensation of speed.
Installation and configuration ELSA MicroLink Cable 14 English b In order for a device to be able to assign addresses to other devices on a TCP/IP network, it first needs an IP address valid in the LAN itself (LAN-IP address). Click the entry in the device list to open the configuration dialog.
Installation and configuration ELSA MicroLink Cable 15 English f Go then to the 'Bridge' section and deactivate the option 'Bridge' on the 'General' tab. g Save the configuration with OK . The ELSA MicroLink Cable is now ready for use in router mode.
Installation and configuration ELSA MicroLink Cable 16 English Assign fixed IP addresses in router mode with activated IP masquerading only. Otherwise, address conflicts with other users in your cable network may result when using router mode without IP masquerading, or bridge mode.
Configuration modes ELSA MicroLink Cable 17 English Configuration modes ELSA cable modems are always delivered with up-to-date software in which a number of the settings have already been prepared for you. It will nevertheless be necessary for you to add some information and configure them to your specific needs.
Configuration modes ELSA MicroLink Cable 18 English Starting inband configuration using ELSA LANconfig After the installation (double-click on 'autorun.exe') is complete, call up the ELSA LANconfig configuration tool, for example by clicking on Start E Programs E ELSAlan E ELSA LANconfig in the Windows task bar.
Configuration modes ELSA MicroLink Cable 19 English Configuration commands Enter commands and path specifications using the normal DOS or UNIX conventions if you are using telnet or a terminal program to configure the device. Enter a forward slash or backslash to separate the path specifications.
Configuration modes ELSA MicroLink Cable 20 English Text entries with spaces are only accepted if they are placed in quotation marks, e.g. set/se/snmp/admin "The Administrator" .
Configuration modes ELSA MicroLink Cable 21 English What's happening on the line? T race Outputs Trace outputs may be used to monitor the internal processes in the cable modem during or after configuration. The trace outputs are slightly delayed behind the actual event, but are always in the correct sequence.
Configuration modes ELSA MicroLink Cable 22 English Any appended parameters are processed from left to right. This means that it is possible to call a parameter and then restrict it. Examples You will find notes on the interpretation of trace outputs in the reference section of this guide.
Configuration modes ELSA MicroLink Cable 23 English – The device no longer responds after loading the new firmware. If an error occurs during the upload, the router automatically reactivates the previous firmware version and reboots the device.
Configuration modes ELSA MicroLink Cable 24 English TF TP With TFTP you can use the writeflash command to install new firmware. To send a new firmware version which, for example, is in the 'LC_1000U.130' file, to a router with the IP address 194.
Configuration modes ELSA MicroLink Cable 25 English SNMP V.1 has only a very limited set of commands at its disposal, as the table below shows: These commands can be used for central monitoring and configuration of SNMP-capable devices on a network. The SNMP capabilities of the agents are specified in so-called MIBs = Management Information Bases.
Configuration modes ELSA MicroLink Cable 26 English Bear in mind that the access protection given by the community mechanism in the SNMP V.1 is only very limited since the data, the MIB IDs and the communities are not encrypted in the UDP data blocks of requests and responses as they are transmitted.
Configuration modes ELSA MicroLink Cable 27 English b Open the corresponding table. If the table is empty, then empty columns will be displayed. c Click on Edit .
Configuration modes ELSA MicroLink Cable 28 English.
Operating modes and functions ELSA MicroLink Cable 29 Operating modes and functions This section is an introduction to the functions and operating modes of your device.
Operating modes and functions ELSA MicroLink Cable 30 a password to gain access to a network, a computer or another device. In order to do so, a computer can, for example, go through all the possible combinations of letter and numbers until the right password is found.
Operating modes and functions ELSA MicroLink Cable 31 Encryption Since cable modems transfer data via a cable shared by many participants, data should be encrypted to prevent access by the other participants. All data between the modem of the provider and the modem of the end users is automatically transferred in an encrypted state.
Operating modes and functions ELSA MicroLink Cable 32 But this provokes objections from the network manager responsible for the security of data on the company's network: Every workstation comput.
Operating modes and functions ELSA MicroLink Cable 33 What do the various entries on the list mean? K IP addresses and IP network masks This is the address of the destination network to which data packets may be sent and its associated network mask.
Operating modes and functions ELSA MicroLink Cable 34 Dynamic routing with IP/RIP In addition to the static routing table ELSA routers also have a dynamic routing table containing up to 128 entries. Unlike the static table, you do not fill this out yourself, but leave it to be dealt with by the router itself.
Operating modes and functions ELSA MicroLink Cable 35 automatically incremented when the corresponding amount of time has elapsed. The distance is set to '16' after 3.5 minutes (route not reachable) and the route is deleted after 5.5 minutes.
Operating modes and functions ELSA MicroLink Cable 36 Module/Local Routing On menu). This tells the router in your device to send the data packet to the other responsible router.
Operating modes and functions ELSA MicroLink Cable 37 The cable modem is therefore assigned a cable IP address and a LAN IP address, each with its own appropriate network mask. Use the 'Masquerade' option to inform the cable modem which of the two addresses to use when transferring the packets.
Operating modes and functions ELSA MicroLink Cable 38 FTP server. The router knows the IP address of the FTP server in the LAN from the entry in the service table (in ELSA LANconfig in the 'TCP/IP' configuration section on the 'Masq.' tab or in the Setup/IP Router Module/Masquerading/Service Table menu).
Operating modes and functions ELSA MicroLink Cable 39 K Initially the router checks whether a DNS server has been entered in its own settings (in configuration tool ELSA LANconfig in the 'TCP/IP' configuration section on the 'Addresses' tab or in the / Setup/TCP-IP Module menu).
Operating modes and functions ELSA MicroLink Cable 40 What are the filter options? You may not always wish to transfer all data. Much of the data which is bouncing around in the LAN is of no interest to remote networks or computers.
Operating modes and functions ELSA MicroLink Cable 41 The cable modem really belongs to two LANs: K On one side it is a part of the LAN of the cable network operator and forms a LAN together with the headend and all connected cable modems. The cable network operator assigns the IP addresses to the participants via DHCP.
Operating modes and functions ELSA MicroLink Cable 42 DHCP – 'on', 'off' or 'auto'? The DHCP server in the devices of ELSA can be set to three different states: K 'on': The DHCP server is permanently active.
Operating modes and functions ELSA MicroLink Cable 43 and the DHCP server attempts to reassign it this address if it has not already been assigned to another computer. The DHCP server also checks whether the address selected is still available in the local network.
Operating modes and functions ELSA MicroLink Cable 44 For each request, a host can ask for a specific period of validity. However, a DHCP server can also assign the host a period of validity that differs from what it requested.
Operating modes and functions ELSA MicroLink Cable 45 The computer has made its initial request. The DHCP server verifies the uniqueness of the address that is to be assigned to the computer. K unknown While verifying uniqueness, it was determined that the address has already been assigned to another computer.
Operating modes and functions ELSA MicroLink Cable 46.
Technical basics ELSA MicroLink Cable 47 Technical basics This chapter is a short introduction into the technology used by your device. Network professionals will find themselves just skimming these pages, but novices will find this section to be very helpful for understanding the technical terms and processes.
Technical basics ELSA MicroLink Cable 48 computer. On the other side is the operator of the broadband cable network who would like to provide more than just radio and TV. A headend can accommodate up to 2000 individual users with cable modems like the ELSA MicroLink Cable .
Technical basics ELSA MicroLink Cable 49 programs on their respective channels. Specific channels are also set up for the transmission of Internet content.
Technical basics ELSA MicroLink Cable 50 Network technology This section will give you a brief introduction to the basics of network technology. These descriptions do not cover all possible techniques, processes and terms associated with network technology.
Technical basics ELSA MicroLink Cable 51 Access to the Internet is also established through point-to-point connections. Even though the data packets are sent from the host at the Internet user to the host at the Internet provider (server) via several routers, every data packet still has its own specific destination.
Technical basics ELSA MicroLink Cable 52 Kinds of networks Protocol An important prerequisite for communications between computers is a common language among the hosts. In the world of network technology this language is called“network protocol” or simply“protocol”.
Technical basics ELSA MicroLink Cable 53 the actual information to be transmitted (useful data), the data packet also contains address and control information. IP address IP addresses are used in IP networks for communications between various devices.
Technical basics ELSA MicroLink Cable 54 And you can also see that there are more bits available to identify the individual hosts in a connected network if there are fewer bits in a netmask that contain a one. While only 254 different addresses could be allocated in the first example with the netmask 255.
Technical basics ELSA MicroLink Cable 55 There are two considerations when using these IP addresses: K The IP addresses used in a private network should not leave this network, i.e. an Internet connection is only possible when using IP masquerading, for example.
Technical basics ELSA MicroLink Cable 56 As an example, think of a company with one large network, in which the different divisions are incorporated as small subnets. The address of the network for the marketing division is made up hierarchically from the address of the company and that of the department.
Technical basics ELSA MicroLink Cable 57 All the router has to remember is that every address beginning with '192.168.100' is located within the network of Example Inc. Now imagine a router that is connected to the network of Example Inc. through an interface.
Technical basics ELSA MicroLink Cable 58 MAC address Specific LAN addresses hardwired into the interfaces by their manufacturers are used to manage the transfer in the LAN. Since the LAN addresses are used for communication via the MAC protocol, they are called MAC addresses.
Technical basics ELSA MicroLink Cable 59 i.e. all it has to remember is the network address and the netmask of the subnet in the LAN. In contrast, the host is confronted with a more difficult task than the router.
Technical basics ELSA MicroLink Cable 60 not find an entry in the table for a particular IP address (in our example '137.226.4.20'), it sends an ARP request packet to all hosts in the LAN (with the LAN broadcast address as a target address).
Technical basics ELSA MicroLink Cable 61 EB'” in the ARP table and tells its LAN interface: “Send this IP packet to the computer with the MAC address '00-10-5A-31-20-EB'”.
Technical basics ELSA MicroLink Cable 62.
Appendix ELSA MicroLink Cable 63 Appendix T echnical data T e chnical data ELSA MicroLink Cable LAN interface Ethernet IEEE 802.3, 10Base-T (T wisted Pair , RJ45, Node/Hub switch) Cable TV interface MCNS DOCSIS (ITU-T J.
Appendix ELSA MicroLink Cable 64 Package contents Accessories: AC adapter , F-to-IEC169-2 adapter , connector cable for cable TV network, 10Base-T cable Software: Configurations software ELSA LANconfi.
Appendix ELSA MicroLink Cable 65 W arranty conditions The ELSA AG warranty, valid as of June 01, 1998, is given to purchasers of ELSA products in addition to the warranty conditions provided by law and in accordance with the following conditions: 1 Warranty coverage a) The warranty covers the equipment delivered and all its parts.
Appendix ELSA MicroLink Cable 66 c) if the damage occurred due to incorrect handling, especially to non-observance of the system description and the operating instructions, d) if the device was opened.
Appendix ELSA MicroLink Cable 67 Declaration of conformity KONFORMITÄTSERKLÄRUNG DECLARATION OF CONFORMITY Diese Erklärung gilt für folgendes Erzeugnis: This declaration is valid for the following.
Appendix ELSA MicroLink Cable 68.
Index ELSA MicroLink Cable 69 Index K A Access control .............................................. 30 Access protocols .......................................... 57 Access time .................................................. 90 Access-list .....
Index ELSA MicroLink Cable 70 K G Gateway ........................................... 32 , 40, 43 K H Heap reserve ................................................ 90 Hierarchical IP addresses ............................. 55 Host ....................
Index ELSA MicroLink Cable 71 Node ............................................................... 4 K O Objects .......................................................... 25 Online media ................................................ 17 Operating .
Index ELSA MicroLink Cable 72 Trap ............................................................... 27 Trap-IP ........................................................ 101 Traps-active ................................................ 101 Type-of-service .
Description of the menu options ELSA MicroLink Cable R73 Description of the menu options The menu tree for ELSA MicroLink Cable configuration is divided up into status information, setup parameters, firmware information and 'other'.
Description of the menu options ELSA MicroLink Cable R74 Overview of the menus Setup Name Cable-module LAN-module Bridge-module TCP-IP-module IP-router -module SNMP-module DHCP-server -module Config-m.
Description of the menu options ELSA MicroLink Cable R75 Status The Status menu contains information on the current status and the internal sequences of operations in the LAN and in the cable network, which can relate to the data transmission route (e.
Description of the menu options ELSA MicroLink Cable R76 Status/Operating-time The operating time of the router since it was last started is displayed here in days, hours, minutes and seconds. Status/Current-time This displays the current device time transferred by the headend.
Description of the menu options ELSA MicroLink Cable R77 Status/LAN-statistics Similarly to the previous menu option, this option allows you to display the statistics relating to the LAN connection.
Description of the menu options ELSA MicroLink Cable R78 Status/Bridge-statistics This option allows you to display statistical information relating to the bridge.
Description of the menu options ELSA MicroLink Cable R79 Status/TCP-IP-statistics The TCP/IP-related statistics are shown here, broken down according to the various TCP/ IP sub-protocols. The TCP-IP statistics contain the following parameters: The substatistics then provide you with further parameters for the individual menus.
Description of the menu options ELSA MicroLink Cable R80 Status/TCP-IP-statistics/IP-statistics These statistics include the following values: Status/TCP-IP-statistics/ICMP-statistics These statistics.
Description of the menu options ELSA MicroLink Cable R81 Status/TCP-IP-statistics/TCP-statistics These statistics include the following values: Status/TCP-IP-statistics/TF TP-statistics These statisti.
Description of the menu options ELSA MicroLink Cable R82 Status/TCP-IP-statistics/DHCP-statistics These statistics include the following values: TF TP-cable-rx-read-request Number of TF TP read reques.
Description of the menu options ELSA MicroLink Cable R83 Table-DHCP There are entries with DHCP information in the DHCP table . It contains 16 entries (or multiples of 16). The table adapts dynamically to the given requirements and grows or shrinks accordingly.
Description of the menu options ELSA MicroLink Cable R84 Protocol- table The protocol table also supplies valuable information on the volume of packets transferred to the LAN or cable network. These values are broken down according to the various IP protocols, such as ICMP, TCP, UDP.
Description of the menu options ELSA MicroLink Cable R85 Status/Config-statistics This menu allows you to display the statistics from the remote configuration area. It allows you to retrieve information on the number of past and present configuration sessions at any time.
Description of the menu options ELSA MicroLink Cable R86 TF TP-server -queue-packets Number of packets in the receive queue of the TF TP server . DHCP-server -queue-packets Number of packets in the receive queue of the DHCP server .
Description of the menu options ELSA MicroLink Cable R87 Status/MCNS-statistics Status/Init-status /MCSN-statistics MCNS-T1-timeouts Number of timeouts while waiting for the upstream channel descripto.
Description of the menu options ELSA MicroLink Cable R88 Status/DHCP-client-statistics Setup This menu allows you to query and modify all the system parameters that are necessary to the functioning of the devices.
Description of the menu options ELSA MicroLink Cable R89 Name Here you can enter the device name (maximum 16 characters). The set of characters available includes uppercase and lowercase letters as well as some special characters.
Description of the menu options ELSA MicroLink Cable R90 Setup/Bridge-module This menu allows you to select the settings necessary for bridge mode. The menu has the following layout: Operating This option allows you to activate or deactivate the bridge.
Description of the menu options ELSA MicroLink Cable R91 The pos setting for broadcast or multicast may lead to higher charges depending on the pricing model of the cable network operator during due to the higher data volume transferred. Setup/Bridge-module/LAN-configuration/Dest.
Description of the menu options ELSA MicroLink Cable R92 Operating The TCP/IP module of the router may be activated or deactivated here. In the default configuration, the TCP/IP module is activated. Configuration via TCP/IP using Telnet and the IP router can only be used if the TCP/IP module is activated.
Description of the menu options ELSA MicroLink Cable R93 If such an IP address already exists in the network, shut down the device using the address for the duration of the configuration and assign a different, free LAN IP address to the cable modem.
Description of the menu options ELSA MicroLink Cable R94 The entries in the ARP table might, for example, have the following appearance if different devices with different IP addresses (192.168.139.20, 192.168.130.30) communicated with the router: ARP-aging-min.
Description of the menu options ELSA MicroLink Cable R95 IP-routing-table The routing table can contain a maximum of 128 entries of destination network addresses or direct IP addresses with netmasks, and the names or IP addresses of other local routers.
Description of the menu options ELSA MicroLink Cable R96 sends all other data packets into the cable network (insofar as these are not in forbidden areas): Enable local routing for this function. Loc. routing Local routing enables the router to forward data packets via the local network.
Description of the menu options ELSA MicroLink Cable R97 Setup/IP-router -module/RIP-configuration This option allows you to enter settings for the management of IP-RIP packets. The menu has the following layout: RIP-type This option allows you to select the method to be used for handling the IP-RIP packets.
Description of the menu options ELSA MicroLink Cable R98 An IP-RIP routing table might, for example, have the following appearance: Cable-RIP LAN-RIP Select whether RIP packets should be sent into the LAN or cable network here. Setup/IP-router -module/Masquerading This menu allows you to enter settings for the masquerading function.
Description of the menu options ELSA MicroLink Cable R99 telnet 192.38.50.100:27 to connect directly to a news server that can be reached via a router with the IP address 192.
Description of the menu options ELSA MicroLink Cable R10 0 The setting all filters out every packet from the specified source network or to the destination network K Src-address, Src-netmask A subnetwork of the local network for which the filter is valid can be entered here.
Description of the menu options ELSA MicroLink Cable R10 1 Network masks and IP addresses of 0.0.0.0 can be used as “wildcards“. Specified computers and networks may be simultaneously subjected to targeted filtering while others pass the router unfiltered.
Description of the menu options ELSA MicroLink Cable R10 2 Off: The device does not operate as a DHCP server. Auto: The device regularly checks whether there is another DHCP server in the LAN. If not, it operates as a DHCP server and issues IP addresses to local clients.
Description of the menu options ELSA MicroLink Cable R10 3 Default-lease- time-minute(s) Here you can enter the period of validity that is assigned if the host makes no request.
Description of the menu options ELSA MicroLink Cable R10 4 Password- required This specifies whether a new password should be requested every time a configuration is begun ( On ), or the password request should be suppressed ( Off ). The default setting for this option is Off .
Description of the menu options ELSA MicroLink Cable R10 5 Version table The version table displays the firmware version and serial number of the device.
Description of the menu options ELSA MicroLink Cable R10 6 – If the device no longer responds and it is therefore impossible to log in, the firmware automatically loads the previous firmware version and reboots the device with it.
An important point after buying a device ELSA Cable (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought ELSA Cable yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data ELSA Cable - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, ELSA Cable you will learn all the available features of the product, as well as information on its operation. The information that you get ELSA Cable will certainly help you make a decision on the purchase.
If you already are a holder of ELSA Cable, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime ELSA Cable.
However, one of the most important roles played by the user manual is to help in solving problems with ELSA Cable. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device ELSA Cable along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
