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ELSA Cable Manual

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ELSA MicroLink
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  • Page 1 ELSA MicroLink Cable...
  • Page 2 The reproduction and distribution of the documentation and software supplied with this product and the use of its contents is subject to written authorization from ELSA. We reserve the right to make any alterations that arise as the result of technical development.
  • Page 3 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. The highest quality standards in manufacturing and stringent quality control are the basis for high product standards and consistent product quality.

  • Page 5: Table Of Contents

    The ELSA MicroLink Cable takes the stage... 1 What does the unit look like? ... 1 Node or hub?... 3 The highlights of the ELSA MicroLink Cable ... 4 Fast Internet ... 4 Internet at all times—always online ... 5 More than just Internet...
  • Page 6 Technical basics ...47 Cable modem technology ... 47 Standards ... 47 Access ... 47 Registration in the cable network ... 48 Network technology... 50 The network and its components ... 50 Connection modes ... 50 Kinds of networks ... 52 IP addressing...
  • Page 7 Status/IP-router-statistics ... 83 Status/config statistics... 85 Status/Queue-statistics ... 85 Status/MCNS-statistics... 87 Status/Init-status ... 87 Status/DHCP-client-statistics ... 88 Setup... 88 Setup/cable-module ... 89 Setup/LAN-module ... 89 Setup/bridge-module ... 90 Setup/TCP-IP-module... 91 Setup/IP-router-module ... 94 Setup/SNMP-module... 101 Setup/DHCP-server-module... 101 Setup/Config-module... 103 Firmware ... 104 Other ...
  • Page 8 VIII Content ELSA Cable Modem...

  • Page 9: Introducing The Elsa Microlink Cable

    Introducing the ELSA MicroLink Cable 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.
  • Page 10 This LED shows that the unit is in stand-by mode. The ELSA MicroLink Cable is registered with the cable network provider in this state, but there is no active connection to the local network. In other words, no data can be exchanged between the Internet and the LAN in this state.
  • Page 11 Now turn the whole thing around and take a look at the rear. Beginning again on the left- hand side, you have: Connector for the cable TV network (CATV) Reset switch—performs a hardware reset Factory Default button—the unit's factory defaults are restored after holding this button for approx.

  • Page 12: Node Or Hub

    This is referred to as the use of a shared media. share a single “cable” Bandwidth: The data flow in the cable network does not take place at a constantly high volume, but Throughput, in irregular intervals. Also, it's unlikely that all 2000 participants will be using the transfer...

  • Page 13: Internet At All Times-Always Online

    One of the biggest advantages of cable modem technology is the continuous availability of the Internet. While “normal” Internet connections need to be established as required, all cable modem users on a cable section can be permanently registered with the headend. The multiport capabilities of the remote stations ensure that other participants are not blocked due to a lack of connections.
  • Page 14 Web.

  • Page 15: Ce Conformity And Fcc Radiation Standard

    The Federal Communications Commission warns the user that changes or modifications to the unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Introducing the ELSA MicroLink Cable ELSA MicroLink Cable...
  • Page 16 Introducing the ELSA MicroLink Cable ELSA MicroLink Cable...

  • Page 17: Installation And Configuration

    Ethernet network adapter TCP/IP network protocol installed and bound to the network adapter First, we will show you how to connect your new ELSA MicroLink Cable , how to install the ELSA LANconfig configuration software and perform the initial configuration. The unit will then be ready to connect your computer or network to the Internet.

  • Page 18: First Steps

    Switch to 'Hub' when connecting the unit directly to a workstation. The wire to the world Connect the ELSA MicroLink Cable to the TV cable network using the coaxial cable or the adapter and a normal antenna cable. Data is transmitted through the cable TV network in accordance with the MCNS (Multimedia Cable Network System)/DOCSIS standard.

  • Page 19: Quick Start: Quick Configurations

    DHCP server. Your cable network operator has such a DHCP server, and one is also contained in the ELSA MicroLink Cable itself. For this quick-start, we prefer using the automatic assignment of an IP address by a DHCP server.
  • Page 20 Start up ELSA LANconfig by clicking Start LANconfig . Click the entry for the ELSA MicroLink Cable in the device list to open the configuration dialog. If an entry doesn't exist yet, create a new one using Device New. For the IP address, enter '10.0.0.254' or 'x.x.x.254', in which 'x.x.x' stands for the addresses previously in use in your network, if applicable.

  • Page 21: Configuration As A Router

    Internet. Configuration as a router In addition to bridge mode, the ELSA MicroLink Cable can also serve as an IP router. In this mode, the ELSA MicroLink Cable pays careful attention to the IP addresses of the computers exchanging data with the Internet.
  • Page 22 Go to the 'DHCP' tab and set the DHCP server to Auto mode. This lets the unit handle the local IP address administration by itself. The ELSA MicroLink Cable determines the valid address pool by itself unless you specify otherwise.

  • Page 23: Set Up The Workstation Computers (Windows 95 Or 98)

    Save the configuration with OK. The ELSA MicroLink Cable is now ready for use in router mode. Open your Web browser, and off you go into the Web with a whole new sensation of speed... If necessary, filters can be defined to restrict the exchange of data packets between the local network and the Internet.
  • Page 24 Specifying the gateway and the DNS server (not necessary if using DHCP) Enter the LAN IP address of the ELSA MicroLink Cable in your own local network as the gateway and domain name server (DNS server) in the individual workstations:...

  • Page 25: Configuration Modes

    This section will show you the programs and routes you can use to access the device and set it up. And, if the team at ELSA has produced firmware with new features, we will show you how to load the new software.

  • Page 26: Starting Inband Configuration Using Elsa Lanconfig

    You will only need to specify the local area network if using the inband solution, and then you're off. Once ELSA LANconfig has finished its search, it displays a list of all the devices it has found, together with their names and a description if available, the IP address and its status.

  • Page 27: Configuration Commands

    Deletes the entry for the remote sta- tion AACHEN. do /firmware/firmware-upload starts the upload of new firmware. repeat 3 dir/status/wan-statistics displays the current WAN statistics every 3 seconds time 24.12.1998 18:00:00 Languages currently supported: English (language english) German (language deutsch) ELSA MicroLink Cable...
  • Page 28 Configuration modes Text entries with spaces are only accepted if they are placed in quotation marks, e.g. set/se/snmp/admin "The Administrator" Text entries (individual and table values) can be deleted as follows: set /se/snmp/admin "" ELSA MicroLink Cable...

  • Page 29: What's Happening On The Line

    What's happening on the line? Trace 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.

  • Page 30: New Firmware With Firmsafe

    New firmware with FirmSafe The software for the devices of ELSA is constantly being updated. We have fitted the units with a flash ROM which makes child's play of updating the operating software so that you can enjoy the benefits of new features and functions. No need to change the EPROM, no need to open up the case: simply load the new release and you're away.

  • Page 31: How To Load New Software

    ELSA LANconfig then tells you the version number and the date of the firmware in the description and offers to upload the file. The firmware you already have installed will be replaced by the selected release by clicking Open.

  • Page 32: Configuration Using Snmp

    This instance is commonly termed the“Manager” while the devices become“Agents”. The structure permitted for SNMP information exchange is relatively simple. A manager can access all SNMP-capable devices and services (agents) on the network. The access rights are controlled via“Communities”. ELSA MicroLink Cable...

  • Page 33: Accessing Tables And Parameters Using Snmp

    The SNMP capabilities of the agents are specified in so-called MIBs = Management Information Bases. The firmware of ELSA routers includes an implementation for an SNMP V.1 agent (in accordance with RFC 1157). A part of MIB-2 and a private MIB, included in the product as a separate file, are supported.
  • Page 34 The row which has been used as the source for the amendment will itself remain unchanged. If we take Castlerock SNMPc as an example, the first possibility can be realized as follows: Activate the Display MIB Table item in the Manage menu of Castlerock SNMPc. ELSA MicroLink Cable IP-netmask Router name 255.255.0.0 0.0.0.0 255.240.0.0...

  • Page 35: The Management Information Base (Mib)

    SNMP management software. This compiler converts the MIB file into a form that can be used by the manager. The current ELSA MIB can be found both included with the product on CD and in the ELSA online media. Configuration modes .
  • Page 36 Configuration modes ELSA MicroLink Cable...

  • Page 37: Operating Modes And Functions

    As long as a password hasn't been set, anyone can change the configuration of the device. The password input field can be found in the configuration tool ELSA LANconfig in the 'Management' configuration section on the 'Security' tab. The password prompt can be activated in a terminal or telnet session in the menu.

  • Page 38: Access Control Via Tcp/Ip

    The circle of authorized users can be expanded by inputting further entries. The filter entries can describe both individual computers and whole networks. The access list can be found in the configuration tool ELSA LANconfig in the 'TCP/IP' configuration section on the 'General' tab, or in the...

  • Page 39: Encryption

    In addition to the definition of the port range and the associated protocols, the filter table can be used to determine whether the data packet concerned will be accepted or rejected. Both interfaces of the cable modem (for the cable network and for the LAN) can be set separately for incoming and outgoing data transfer.

  • Page 40: Ip Routing

    An IP router works between networks which use TCP/IP as the network protocol. This only allows data transmissions to destination addresses entered in the routing table. This chapter explains the structure of the IP routing table of an ELSA router, as well as the additional functions available to support IP routing.
  • Page 41 By default, you will find the entry „CABLE“ in the cable modem, as a router name at the default route. All IP data packets transferred via this route are forwarded to the cable interface.

  • Page 42: Dynamic Routing With Ip Rip

    255.255.255.255 0.0.0.0 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. It uses the Routing Information Protocol (RIP) for this purpose.

  • Page 43: Local Routing

    If a device notifies the degradation of its own static routing table in this way, the cable modem will take this into account and include the poorer entry in its dynamic table.

  • Page 44: Ip Masquerading (Nat, Pat)

    IP masquerading has the added benefit of guarding very effectively against attacks on the local network from the Internet. The IP masquerading function is connected to the operating mode of the cable modem as a router. Whenever routers are mentioned in the following paragraphs, this is a reference to the cable modem in the operating mode of an IP router.
  • Page 45 The response to this new packet is now sent to the cable IP address of the cable modem with the new sender port number. The entry in the internal table allows the router to assign this response to the original sender again.

  • Page 46: Dns Forwarding

    If a computer calls up a home page from the intranet, it first sends out a DNS request: “What is the IP address associated with www.domain.com?” This request is dealt with as follows if the cable modem is registered as the DNS server for the workstation computers:...

  • Page 47: Bridging

    If no DNS server has been entered in the cable modem, it tries to reach the network operator's DNS server to retrieve the IP address associated with the name. The address of the DNS at the network operator is transferred during the registration of the cable modem by the headend.

  • Page 48: Automatic Address Administration With Dhcp

    In such situations, the DHCP (Dynamic Host Configuration Protocol) is the ideal solution. Using this protocol, a DHCP server in a TCP/IP-based LAN can dynamically assign the necessary addresses to the individual stations. ELSA MicroLink Cable Setup/Bridge-Module/LAN- ) or the addresses to be ).

  • Page 49: The Dhcp Client

    The cable modem really belongs to two LANs: 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.

  • Page 50: Dhcp - 'On', 'Off' Or 'Auto

    (start or end) from the LAN IP address settings in the 'TCP/IP module'. If the cable modem has no LAN IP address of its own, the device will go into a special operating mode. It then uses the IP address '10.0.0.254' for itself and the address pool '10.x.x.x' for the assignment of IP addresses in the network.
  • Page 51 (above all its IP address), it applies for an extension ahead of time that it is generally sure to be granted. The computer loses its address only if it is switched off when the period of validity expires. ELSA MicroLink Cable...
  • Page 52 IP address, the MAC address, the validity, the name of the computer (if available) and the type of address assignment. The 'Type' field specifies how the address was assigned. This field can assume the following values: ELSA MicroLink Cable Settings Control Panel Control Panel Network.
  • Page 53 A computer has informed the DHCP server that it has a fixed IP address. This address can no longer be used. dynamic The DHCP server assigned an address to the computer. ELSA MicroLink Cable...
  • Page 54 Operating modes and functions ELSA MicroLink Cable...

  • Page 55: Technical Basics

    Downstream: This cable is well-suited for the transfer of large volumes of data. Up to now, the one- Transfer of data way flow of data from the provider to the user (downstream) has been a problem for such from the applications, however.

  • Page 56: Registration In The Cable Network

    No further hardware is needed for the connection between the Internet user and the network operator as long as both the cable modem and the headend use the bidirectional MCNS standard.
  • Page 57 Sync LED on the ELSA MicroLink Cable network flashes. The next time the cable modem is switched on, it will first look for the channel it found the previous time, and thus find the wanted information at a substantially faster rate.

  • Page 58: Network Technology

    For computers to be able to communicate, they need a physical medium medium, through which the information can be transmitted. This can be a cable or radio link, for interfaces example, that is connected to the computers using special interfaces (e.g. network adapters).
  • Page 59 If the packet is addressed to the corresponding host, it will then accept it. If not, the host will ignore (reject) it. This is a“point-to-multipoint connection”, since we are not dealing with an unambiguous connection. Data packet Medium Router Technical basics Host Connections to other routers Host Web server ELSA MicroLink Cable...

  • Page 60: Kinds Of Networks

    In IP networks the communication between computers takes place in a packet-oriented transfer fashion. This means that data or messages are packed together in packets of variable length and are as such sent from the source computer to the target computer. Apart from ELSA MicroLink Cable Host Data packet with recipient...
  • Page 61 IP address for communication with the “outside world” using the ISDN. In the same way, ELSA cable modems have an IP address for their own network and another IP address for the exchange of data with the cable network.
  • Page 62 255.240.0.0 192.168.0.0 255.255.0.0 224.0.0.0 224.0.0.0 ELSA MicroLink Cable Remark “10” networks: All IP addresses beginning with 10. and whose mask begins with 255. belong to the address range reserved for private use. All IP addresses beginning with 172.16.–172.31. which are associ- ated with a net mask greater than or equal to 255.240.0.0 are within...

  • Page 63: Ip Routing And Hierarchical Ip Addressing

    A router has to know both the addresses of the hosts that are directly connected to it, and the addresses of all networks and subnets that are reachable via adjacent routers. It is not necessary for a router to know all other possible IP addresses. Technical basics ELSA MicroLink Cable...
  • Page 64 Now we shall take a look at the example using proper IP addresses instead of symbolic names. The network of Example Inc. has the numerical space '192.168.100.0' to '192.168.100.255' at its disposal, with the '0' for the network address and the '255' for the sender address. ELSA MicroLink Cable Marketing Superordinate network: Example Inc.

  • Page 65: Expansion Through Local Networks

    IP network, i.e. IP networks can use the physical connections of the LAN to establish connections between the hosts and the routers. LAN refers to a limitation of the area covered by the network, not a restriction of the number of workstations connected to it. Technical basics ELSA MicroLink Cable...
  • Page 66 So the task for the router is very simple: all it has to know for operating in the IP network are the IP addresses of the directly connected hosts and of the available networks and subnets, ELSA MicroLink Cable IP host in the LAN LAN with router function:...
  • Page 67 In contrast, the host is confronted with a more difficult task than the router. In case of an interface with a point-to-point cable, the host knows that all packets that it sends through the interface automatically arrive at its router, for example. In case of the point- to-multipoint connection to the LAN, it has to distinguish two cases, however.
  • Page 68 Host 'Smith' Then it can finally turn to its original task: sending the IP packet to host 'Miller'. It now finds the entry “IP address 137.226.4.20 corresponding to MAC address '00-10-5A-31-20- ELSA MicroLink Cable ARP request to '137.226.4.20' ARP response '137.226.4.20' =...
  • Page 69 LAN based. In some cases a LAN is covers such a large area that the physical characteristics of the cable prohibit the connection of any more computers. This results in the necessity to couple up several LANs in such a way that electrically and in terms of the MAC protocol they act as independent LANs, but for the IP protocol look like one big LAN.
  • Page 70 Technical basics ELSA MicroLink Cable...

  • Page 71: Appendix

    Management Cable network operator: User: Display/operation LEDs for LAN and cable TV network status, factory-default button, reset button Power supply 12 V AC with AC adapter for 230 V (US version: 110V), 10 VA Ambient conditions Temperature: 5 - 40°C, humidity: 0 - 80%, non-condensing Dimensions and Rugged metal case, LEDs on front panel, connections on rear panel;...
  • Page 72 Installation Guide: Service Warranty: ELSAcare: Support: ELSA MicroLink Cable AC adapter, F-to-IEC169-2 adapter, connector cable for cable TV network, 10Base-T cable Configurations software ELSA LANconfig , TFTP client Comprehensive manual and ELSA CD-ROM German, English, French, Italian, Dutch, Spanish 6 years...

  • Page 73: Warranty Conditions

    Warranty 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: Warranty coverage The warranty covers the equipment delivered and all its parts. Parts will, at our sole discretion, be replaced or repaired free of charge if, despite proven proper handling and adherence to the operating instructions, these parts became defective due to fabrication and/or material defects.
  • Page 74 ELSA Monitor, damage to the cathode ray tube (CRT) has been caused especially by mechanical load (e.g. from shock to the pitch mask assembly or damage to the glass tube), by...

  • Page 75: Declaration Of Conformity

    Aachen, July 19 1999 Modem MicroLink Cable : EN61000-4-2,3,4,6,11 Parts : EN 55022B+A1: 1995 +A2: 1997 Parts ELSA AG Sonnenweg 11 D-52070 Aachen abgegeben durch this declaration is submitted by i.V. Peter Wieninger Bereichsleiter Entwicklung VP Engineering Appendix ELSA MicroLink Cable...
  • Page 76 Appendix ELSA MicroLink Cable...
  • Page 77 Broadcast ... 90 Broadcast address ... 54 Broadcast data packets ... 90 Broadcast transfer ... 57 Brute force ... 29 Cable ... 50 Cable network ... 53 Cache ... 93 CE ... 7 Cells ... 50 Communities ... 25 Config-aging-minute(s) ... 104 Configuration Commands ...
  • Page 78 Name ... 89 NAT ... 30 Netmask ... 53 Network ... 50 Network adapter ... 50 Network address ... 53 Network cable ... 50 Network connection ... 89 Network Information Center ... 36 Network protocol ... 52 NIC ... 36...
  • Page 79 Telnet server ... 93 TFTP ... 17 TFTP server ... 93 Time ... 76 Timeout ... 103 TOS ... 96 Trace code and parameters ... 21 Examples ... 22 starting ... 21 Trace Outputs ... 21 Index ELSA MicroLink Cable...
  • Page 80 Index Trap ... 27 Trap-IP ... 101 Traps-active ... 101 Type-of-service ... 96 UDP ... 99 Upload ... 22 ELSA MicroLink Cable Upload-system ... 106 Version-table ... 105 Wireless links ... 50 WWW ... 32...

  • Page 81: Description Of The Menu Options

    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'. In order to help you familiarize yourself with the system, you will first be given an overview of the menu structure.
  • Page 82 Setup Name Cable-module LAN-module Bridge-module TCP-IP-module IP-router-module SNMP-module DHCP-server-module Config-module SYSLOG-module Firmware Version-table Table-firmsafe Mode-firmsafe Timeout-firmsafe Test-firmware Firmware-upload ELSA MicroLink Cable Status Operating-time Current-time Cable-statistics LAN-statistics Bridge-statistics TCP-IP-statistics IP-router-statistics Config-statistics Queue-statistics MCNS-statistics Init-status DHCP-client-status Output-internal-status messages Delete-values Other Boot-system Factory-default-system...

  • Page 83: 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.g. registration with the headend) or to statistics (e.g. number of data blocks received and transmitted).

  • Page 84: Status/Operating-Time

    This displays the current device time transferred by the headend. Status/Cable-statistics This option allows you to display the various statistics parameters for the cable network port. A large number of values related to the data volume transferred provide you with useful information on cable port load, errors that have occurred and the internal resources of the cable modems that are available in the current operating state.

  • Page 85: Status/Lan-Statistics

    Description of the menu options Running status displays Number of MCNS headers correctly received Number of cable FEC lock losses not synchronized Number of cable FEC lock losses resynchronized Number of cable TRC lock losses not synchronized Number of cable TRC lock losses resynchronized...

  • Page 86: Status/Bridge Statistics

    Number of broadcasts received from the LAN Number of multicasts received from the LAN Number of data packets received from the cable network Number of data packets sent to the cable network Number of filtered data packets from the cable network...

  • Page 87: Status/Tcp-Ip-Statistics

    Number of ARP requests and responses sent to the LAN Number of ARP requests incorretly received from the LAN Number of ARP requests and responses received from the cable network Number of ARP requests and responses sent to the cable network...
  • Page 88 Number of IP-packets sent to the cable network Number of IP packets incorrectly received from the cable network Number of IP packets received from the cable network for an incor- rect service Number of packets from the cable network that actually should have been fragmented prior to transmission due to their size, but which could not be fragmented.
  • Page 89 Number of TCP packets repeatedly sent to the cable network Number of TCP packets incorrectly received from the cable net- work Number of TCP packets received from the cable network for an incorrect port Current number of TCP connections from the WAN...
  • Page 90 Table-DHCP Delete-values ELSA MicroLink Cable Number of TFTP read requests received from the cable network Number of TFTP write requests received from the cable network Number of TFTP data packets received from the cable network Number of TFTP acknowledges received from the cable network...

  • Page 91: Status/Ip-Router-Statistics

    Number of LAN packets with an expired time-to-live value Number of LAN packets filtered by the filter table Number of LAN packets discarded Number of data packets to be routed from the cable net- work Number of data packets routed to the cable network...
  • Page 92 The protocol table also supplies valuable information on the volume of packets table transferred to the LAN or cable network. These values are broken down according to the various IP protocols, such as ICMP, TCP, UDP. A protocol table might have the following appearance:...

  • Page 93: Status/Config Statistics

    Current number of active configuration connections from the cable network Previous number of active configuration connections from the cable network Total number of defective logins Number of login locks Number of login attempts while the login lock was active...
  • Page 94 SNMP-queue-packets TFTP-client-queue-packets DNS-tx-queue-packets DNS-rx-queue-packets IP-Masq.- tx-queue-packets IP-Masq.- rx-queue-packets ELSA MicroLink Cable Statistics on the queue Number of packets in the receive queue of the TFTP server. Number of packets in the receive queue of the DHCP server. Number of packets in the receive queue of the DHCP...

  • Page 95: Status/Mcns-Statistics

    Current transmission power in dBm Status of the ranging process Status of the DHCP negotiation Display of the Time-of-day negotiation Status of the configuration file download Status of the registration with the headend Service ID during and after registration ELSA MicroLink Cable...

  • Page 96: Status/Dhcp-Client-Statistics

    /Setup Name Cable-module LAN-module Bridge-module TCP-IP-module ELSA MicroLink Cable Class ID after registration Number of the upstream channel Number of the downstream channel Status of the DHCP client, on or off Validity for the values assigned IP address assigned by the headend...

  • Page 97: Setup/Cable-Module

    This option allows you to display the router’s own Ethernet address. The value displayed here was set at the factory and cannot be changed. The Ethernet address is displayed as a 12-digit hexadecimal value, with the first six digits '00a057' standing for an ELSA device.

  • Page 98: Setup/Bridge-Module

    (pos = default), never (neg), or only when a connection exists (sem). ELSA MicroLink Cable Bridge settings Bridge active or inactive Displays bridge table. Settings for the LAN side Settings for the cable side Last-access Forward-, Filter-Flag 4 tics local 105073354 tics...

  • Page 99: Setup/Tcp-Ip-Module

    Setup/Bridge-module/cable-configuration This option allows you to select the settings for cable data packets. The settings in this menu are exactly the same as the settings in the LAN-configuration menu except that they serve to filter the data packets received from the cable network.
  • Page 100 The IP address for the device as transmitted by the headend during the registration is displayed here. The default address on delivery is '0.0.0.0'. This IP address is used by the cable modem for the connection to the provider's (cable network operator) network.
  • Page 101 Any requests from devices with different IP addresses are ignored. If a complete network has access enabled to a ELSA MicroLink Cable , this can be done as follows for a class C network: IP-address 192.234.222.0...

  • Page 102: Setup/Ip-Router-Module

    Setup/IP-router-module This section describes the functions of the cable modem as an IP router. References in the following text to 'routers' thus refer to the cable modem in its IP router operating mode. This menu allows you to enter settings for the IP router module. The menu has the...
  • Page 103 Because it contains the IP network mask 0.0.0.0, this line is always appropriate after the rest of the table has been searched. The router with the name 'Cable' stands for the cable network. The router thus sends everything that it cannot forward or transfer over other routes to the cable network operator's headend.
  • Page 104 Description of the menu options sends all other data packets into the cable network (insofar as these are not in forbidden areas): IP-address 192.168.0.0 172.16.0.0 10.2.0.0 10.0.0.0 255.255.255.255 Enable local routing for this function. Loc. routing Local routing enables the router to forward data packets via the local network. The local routing is necessary if the router, as the default gateway for the workstations receives packets for destination networks to which it cannot establish a connection itself.
  • Page 105 255.255.0.0 yield the IP network mask 255.128.0.0. Table-IP-RIP This option allows you to display the entries in the current dynamic IP routing table. Description of the menu options Settings for IP-RIP operation RIP compatibility switch Management of network masks Dynamic IP routing table ELSA MicroLink Cable...
  • Page 106 An IP-RIP routing table might, for example, have the following appearance: IP-address 223.245.254.0 223.245.257.0 Cable-RIP Select whether RIP packets should be sent into the LAN or cable network here. LAN-RIP Setup/IP-router-module/Masquerading This menu allows you to enter settings for the masquerading function. The menu has the following layout:...
  • Page 107 Protocol that is to be filtered. Possible entries are TCP, UDP, ICMP and all. Description of the menu options S-port Protocol 1234 Src-address Src-netmask 255.255.255.255 0.0.0.0 D-st. D-end Action Timeout S-st. S-end Dst-address 0.0.0.0 Direct. MBUcst Matches ELSA MicroLink Cable...
  • Page 108 The filter can discard (not forward) or accept (forward) packets. Interface Select whether the filter should apply to the LAN interface, the interface to the cable TV network, or both. Direction Select whether the filter should apply to incoming, outgoing, or all packets.

  • Page 109: Setup/Snmp-Module

    Network mask for the address pool Broadcast address for the LAN Maximum period of validity for the address assignment via DHCP Default period of validity for the address assignment via DHCP Table of current assignments via DHCP ELSA MicroLink Cable R10 1...
  • Page 110 'Setup/TCP module'. The procedure is as follows: If only the cable or LAN-IP address is entered, the start or end of the pool is determined by means of the associated network mask. If both addresses have been specified, the LAN-IP address has priority for determining the pool.

  • Page 111: Setup/Config-Module

    Description of the menu options Node-ID Timeout 00a0570308e1 Configuration module settings Password required on/off if there is no password Configuration of the On/Standby switch Standby status Time limit for remote configuration connections Hostname Type ELSA ELSA MicroLink Cable R10 3...

  • Page 112: Firmware

    The default value is 5. A lower value may cause the log-in block to be activated with only one access on an older ELSA LANconfig! In this case obtain an updated ELSA LANconfig version from our online sources.
  • Page 113 Display and keyboard settings Time in minutes required to test new firmware Tests the inactive firmware Initiates a firmware upload Version Serial-number 1.00 22.03.99 0317.000.005 Version Date Size 1.60 23061999 1.60 30061999 1.60 07061999 R10 5 Index ELSA MicroLink Cable...

  • Page 114: Other

    The flash ROM technology permits flexible and service-friendly handling of the system software by allowing different firmware versions to be read in. It also allows devices to be retrofitted with all future options. ELSA MicroLink Cable Various functions Boots the device...

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