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ELSA LANCOM Business 6000

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EN

4.9.3  The first remote connection using a PPP client and Telnet  . . . . . . . . . . . . . .  32
4.9.4  Limiting remote configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32

4.10  Trace outputs—Information for pros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  34

4.10.1  How to start a trace  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35

4.11  New firmware with ELSA FirmSafe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37

4.11.1  This is how ELSA FirmSafe works  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
4.11.2  How to load new software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38

5  Connection via 2-Mbit interface  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41

5.1  Areas of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
5.2  Technical basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42

5.2.1  The 2-Mbit interfaces of your device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
5.2.2  G.703 – simple basis for 2-Mbit connections. . . . . . . . . . . . . . . . . . . . . . . . .  43
5.2.3  G.704 structures the data stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
5.2.4  Which method for your purpose? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
5.2.5  Setting up the basic protocols  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47

5.3  Bundling of 2-Mbit connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49

6  Operating modes and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53

6.1  Security for your configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53

6.1.1  Password protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
6.1.2  Login barring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
6.1.3  Access control via TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54

6.2  Security for your LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
6.3  Identification control  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55

6.3.1  Callback   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
6.3.2  Data packet filtering—Firewall  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
6.3.3  The hiding place—IP masquerading (NAT, PAT) . . . . . . . . . . . . . . . . . . . . . .  61

6.4  Automatic IP address administration with DHCP. . . . . . . . . . . . . . . . . . . . . . . . . . .  61

6.4.1  The DHCP server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
6.4.2  DHCP—'on', 'off' or 'auto'? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  62
6.4.3  How are the addresses assigned?  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
6.4.4  Configuring the DHCP server  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  67

6.5  DNS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69

6.5.1  What does a DNS server do? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  69
6.5.2  Setting up the DNS server  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  70

6.6  NetBIOS proxy  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  72

6.6.1  To the point: What is NetBIOS? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  72
6.6.2  Handling of NetBIOS packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  73
6.6.3  Which preconditions must be fulfilled?  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  74

Содержание LANCOM Business 6000

Страница 1: ...ELSA LANCOM TM Business 6000...

Страница 2: ...CERT certification authority has confirmed ELSA conformity to the worldwide ISO 9001 standard in certificate number 09 100 5069 issued on June 15 1998 You can find all declarations and approvals for t...

Страница 3: ...LANCOM Business 6011 ELSA LANCOM Business 6021 Model restrictions The sections of the documentation that refer only to a range of models are marked either in the corresponding text itself or with appr...

Страница 4: ...ELSA LANCOM Business 6000 EN...

Страница 5: ...nfiguration and management 21 4 1 Configuration tools and approaches 21 4 1 1 Configuration access to the ELSA LANCOM Business 21 4 1 2 Configuration software 22 4 2 Configuration using ELSA LANconfig...

Страница 6: ...ing up the basic protocols 47 5 3 Bundling of 2 Mbit connections 49 6 Operating modes and functions 53 6 1 Security for your configuration 53 6 1 1 Password protection 54 6 1 2 Login barring 54 6 1 3...

Страница 7: ...ffice communications and LANCAPI 94 6 9 1 ELSA LANCAPI 94 6 10 ELSA CAPI Faxmodem 99 6 11 Call charge management 100 6 11 1 Charge based ISDN connection limits 100 6 11 2 Time dependent ISDN connectio...

Страница 8: ...140 7 4 8 Exponential backoff 141 7 4 9 IPX packet filters 142 7 5 IP routing 144 7 5 1 The IP routing table 144 7 5 2 TCP IP packet filters 147 7 5 3 Proxy ARP 148 7 5 4 Local routing 149 7 5 5 Dynam...

Страница 9: ...systems See the following sections for a detailed description of the functions of the ELSA LANCOM Business the software and how to use it and an introduction to the technical basics 1 1 What does the...

Страница 10: ...Introduction ELSA LANCOM Business 6000 10 EN...

Страница 11: ...y the unit Operating states and messages can be displayed in three different modes Use the keys to select the display mode confirm messages and scroll through the multi line display Power Msg This LED...

Страница 12: ...Business 6021 only this interface is addressed by the router as the second G 703 interface G 703 2 or channel 4 1 in the channel table G 703 interface ELSA LANCOM Business 6011 and ELSA LANCOM Busine...

Страница 13: ...not active flashing Interface active no signal from external device on Interface active device connected Line LED orange off No connection established flashing Connection establishment protocol negoti...

Страница 14: ...iption of the device ELSA LANCOM Business 6000 14 EN Line LED orange off No connection established flashing Connection establishment protocol negotiation e g via PPP on Active connection to remote sta...

Страница 15: ...ELSA LANCOM Business Power supply unit LAN connector cable 100Base TX yellow plug Cable for G 703 interface LANCOM Business 6011 and 6021 only green plug Cable for the X 21 interface ISDN connector c...

Страница 16: ...ndicates that a usable connection to the LAN has been established If this LED does not come on reverse the node hub selector switch If the LED still does not light there may be a problem with the netw...

Страница 17: ...Insert the appropriate connector cable in the device s G 703 socket Connect the stranded wires at the other end of the cable to the D2MU or D2MS terminals of the network terminator In some countries a...

Страница 18: ...are The included CD contains a setup program with which you can install the ELSA software Place the CD in your CD ROM drive If the Setup program doesn t start automatically you can start in manually T...

Страница 19: ...text only browsers from any operating system The precondition access to the router via the network The same wizards are available for both options Your choice thus depends on the operating system of...

Страница 20: ...The wizards have been designed so as to permit the router to be set up easily quickly and reliably for typical applications using the wizards alone The use of the wizards is self explanatory You can...

Страница 21: ...ptions for their configuration First a look at the approaches 4 1 1 Configuration access to the ELSA LANCOM Business A ELSA LANCOM Business can be accessed via three different options Through the conf...

Страница 22: ...inband and remote configuration are supported ELSA WEBconfig this software is permanently installed in the router All that is required on the workstation used for the configuration is a web browser W...

Страница 23: ...description the IP address and its status Two different display options can be selected for configuring the devices with ELSA LANconfig The Simple configuration display shows only the settings requir...

Страница 24: ...e ELSA LANCOM Business device The Browser based basic configuration with ELSA WEBconfig covers accessing an unconfigured device for the first time using WEBconfig and performing the basic configuratio...

Страница 25: ...nals also have a lot to gain from them The wizards are available in two programs in ELSA LANconfig under Windows operating systems in ELSA WEBconfig which can be accessed from any web browser 4 6 1 Ba...

Страница 26: ...web browser You are thus not dependent on the Windows operating system as you are with ELSA LANconfig There s only precondition for accessing the router you must know its IP address What is the IP add...

Страница 27: ...your choice We recommend storing the help files on your local computer or on a server that you can access at any time This can be either a file server or a web HTTP server Storing the files on a loca...

Страница 28: ...ames and paths used can be selected freely Replace the placeholder IP address with the valid IP address of the HTTP servers in x x x x format for example 128 7 9 155 You can download the current versi...

Страница 29: ...ly installed together with ELSA LANconfig on the computer from which you wish to configure your router If ELSA LANmonitor is not yet installed on your computer place the ELSA LANCOM Business in your C...

Страница 30: ...st and initially displays the status of the transfer channels Start your Internet browser and enter any web page you like ELSA LANmonitor now shows a connection being established on one channel and th...

Страница 31: ...to the other network or instruct the staff on site on configuring the router You can also reserve a special calling number for remote configuration Then the support technician can always access the ro...

Страница 32: ...or the connection only if required Open a Telnet session to the ELSA LANCOM Business Use the following IP address for this purpose 172 17 17 18 if you have not defined an IP address for the PPP client...

Страница 33: ...tically entered by the ELSA LANconfig program during call establishment will be accepted during the PPP negotiations Switch to the Security tab in the Management configuration section In the Configura...

Страница 34: ...h trace can be used to display the individual steps involved in negotiating the PPP Experienced users may interpret these outputs to trace any errors occurring in the establishment of a connection A p...

Страница 35: ...ce output Deactivates a trace output Switches between different trace outputs toggle no code Displays the current status of the trace This parameter brings up the following display for the trace Statu...

Страница 36: ...in front of the actual trace output Source Includes a display of the protocol that has initiated the output in front of the trace This code in combination with the trace causes the following trace Dis...

Страница 37: ...ew firmware and activates it immediately This can result in the following situations The new firmware is loaded successfully and works as desired Then all is well The device no longer responds after l...

Страница 38: ...on the Firmware Upload button Then select the directory in which the new version is located and mark the corresponding file ELSA LANconfig then tells you the version number and the date of the firmwar...

Страница 39: ...ed to install new firmware on ELSA LANCOM Business This can be done with the command or target writeflash For example to install new firmware in a ELSA LANCOM Business with the IP address 194 162 200...

Страница 40: ...SA LANCOM Business 6000 40 EN tftp 10 0 0 1 put file1 writeconfig Writes the configuration from file1 to the device with the address 10 0 0 1 tftp 10 0 0 1 get dir status verb file2 Saves the current...

Страница 41: ...ts to the remote network Unlike with a bridging solution the two networks continue to appear as two separate networks You can however grant any workstation of either network access to the resources of...

Страница 42: ...LANCOM Business 6001 one X 21 interface ELSA LANCOM Business 6011 one X 21 interface one G 703 connection ELSA LANCOM Business 6021 one X 21 connection two G 703 connections X 21 terminal adapter req...

Страница 43: ...e transferred bits into content 5 2 3 G 704 structures the data stream A protocol which provides additional information about the structure of the transferred bits is required in order to use the cont...

Страница 44: ...ll non reserved timeslots are available for the transmission of user data In their function and bandwidth they correspond to the B channels in the ISDN As a rule any combination of timeslots can be us...

Страница 45: ...hod for your purpose In short three methods are common under G 703 704 All three result in different user data bandwidths Most telecommunications providers offer unstructured G 703 connections as well...

Страница 46: ...2 protocol is its high guaranteed operational security Very few providers are willing to guarantee an operational security higher than 95 for unstructured G 703 connections As errors in G 704 lines c...

Страница 47: ...g X 21 interface No further input is necessary when using an X 21 interface and a terminal adapter In this case the configuration of all connection parameters is performed at the terminal adapter assu...

Страница 48: ...nection These settings are virtually ideal for establishing connections between two ELSA routers The configuration only needs to be changed manually for terminal devices that require other settings Th...

Страница 49: ...703 interface in combination with a X 21 connection The bundling takes place in the datalink layer of the OSI model i e on level 2 It is realized using the BACP protocol Bandwidth Allocation Control P...

Страница 50: ...21 The ISDN channels are only mentioned in this table for the sake of completeness In practice there is no point in bundling ISDN channels with 2 Mbit connections Further information will be provided...

Страница 51: ...over channel 3 1 with 2 048 kbps only 1 920 kbps of the faster channel will be used The total bandwidth will only be 3 840 kbps instead of the expected 3 968 kbps This loss of speed is especially pro...

Страница 52: ...Connection via 2 Mbit interface ELSA LANCOM Business 6000 52 EN...

Страница 53: ...e communications with ELSA LANCAPI Reserving B channels Modem dial up up to V 90 Charge management Accounting Least cost router Alongside the description of the individual points we will also give you...

Страница 54: ...numbers until the right password is found As a measure of protection against such attacks the maximum allowed number of unsuccessful attempts to Login can be set If this limit is reached access will b...

Страница 55: ...Access protection using name and password Access protection via caller ID Callback to defined call numbers Data packet filtering firewall IP masquerading also known as NAT PAT 6 3 Identification contr...

Страница 56: ...lf establishes a connection to an Internet service provider for example it uses the user name and password from the PPP list If no user name has been entered there the device name will be used instead...

Страница 57: ...tion is to be apportioned The router accepts all unit charges except for the unit required to send the name if call back After name verification is set in the name list The caller also accepts a unit...

Страница 58: ...te that all procedures access the same configuration data For example if you change the filter settings in LANconfig this will also have a direct effect on the values under WEBconfig and Telnet Settin...

Страница 59: ...an also be created directly but this is not required Making the required entries in the object and rules tables is sufficient for the filter list to be generated This ensures that no inconsistent entr...

Страница 60: ...sts separated by commas such as host lists address lists A10 0 0 1 10 0 0 2 or ranges separated by hyphens such as port lists S20 25 Insertion of a 0 or an empty string indicates the any object Host n...

Страница 61: ...can be fixed or assigned dynamically by the provider The computers in the LAN then use the router as a gateway so that they themselves cannot be detected To do this the router separates Internet and...

Страница 62: ...from its own IP address or intranet address In DHCP mode a completely unconfigured device can even automatically assign IP addresses to itself and the computers in the network In the simplest case all...

Страница 63: ...addresses The IP address can be taken from the address pool selected start address pool to end address pool Any valid addresses in the local network can be entered here If 0 0 0 0 is entered instead...

Страница 64: ...e DHCP module this mask is used for the assignment Otherwise the network mask from the TCP IP module is used The order is the same as during the assignment of the addresses Broadcast address assignmen...

Страница 65: ...what it requested The DHCP module provides two settings for influencing the period of validity Maximum lease time in minutes Here you can enter the maximum period of validity that the DHCP server ass...

Страница 66: ...pen Properties You can now enter the desired values by selecting the various tabs The assignment of IP addresses to the various computers can be checked using the Setup DHCP Table DHCP item in the DHC...

Страница 67: ...our network set the switch to the Hub position Switch the device on It will not find any other DHCP servers in the network and will thus enable its own DHCP functions If you have not done so already i...

Страница 68: ...network select the option Make all settings automatically in this wizard and confirm your selection with Finish in the next window The wizard assigns the IP address 10 0 0 1 with the netmask 255 255 2...

Страница 69: ...address for a request such as www elsa com for example However it s also useful to be able to clearly associate IP addresses to computer names within a local network or in a LAN interconnection 6 5 1...

Страница 70: ...to it First the DNS server checks whether access to the name is not prohibited by the filter list If that is the case an error message is returned to the requesting computer stating that access to th...

Страница 71: ...ress that are not located in your own LAN that are not on the Internet and that are accessible via the router For example if would like to access the mail server at your headquarters name mail yourdom...

Страница 72: ...u can also apply filters to individual departments by carefully selecting the IP addresses and subnet masks The IP address 0 0 0 0 stands for all computers in the network and the subnet mask 0 0 0 0 f...

Страница 73: ...tion about the names in use can be placed on a billboard of sorts on which all participating computers only post their names and IP addresses In this case the individual computers are responsible for...

Страница 74: ...stations not present in either the LAN or as established NetBIOS remote stations thus preventing the establishment of a connection via the DEFAULT route to the Internet 6 6 3 Which preconditions must...

Страница 75: ...Client The Windows network client is required to permit all of the workstations in the Windows network to log on with names and passwords To install the client click Start Settings Control Panel Netwo...

Страница 76: ...ing NetBIOS within these networks Names also may not recur in different groups File and printer sharing Ensure that file and printer sharing is enabled after the installation is complete To do so sele...

Страница 77: ...t you would like to share with others on the network and select the item Sharing from the context menu Enter a name for the shared resource and a description if required The manner in which the resour...

Страница 78: ...ttings of the IP filter This filter must capture all NetBIOS packets to be sent over the DEFAULT route to ensure that they do not lead the establishment of a connection on the DEFAULT route This has b...

Страница 79: ...identified as dial up nodes The required information regarding the other computers in the networks is then exchanged during this initial connection Computers on the remote site cannot be accessed unti...

Страница 80: ...launch Windows Networking NetBIOS routing via LAN LAN coupling Once the NetBIOS modules have been activated and the networks have exchanged their information regarding the available workstations a li...

Страница 81: ...r remote computers and create associations as described above NetBIOS routing via RAS The procedure for access to the Windows Network via RAS is somewhat different These are the two fundamental differ...

Страница 82: ...slog conf directs which facilities this expression will be explained later should be written to which log file Check in the configuration of the daemon whether network connections are explicitly monit...

Страница 83: ...sages boot processes timer system etc KERNEL Login Messages regarding login and logout of a user during the PPP negotiation and errors occurring during this process AUTH System time Messages regarding...

Страница 84: ...llected under this heading PANIC ALERT CRIT Error All error messages that can occur during normal operation without requiring administrative inter vention are sent to this level e g connection errors...

Страница 85: ...iness to the file var log lancom log 6 8 ISDN connections Data communications between two ISDN terminal devices takes place via ISDN connections These connections can be realized either as dial up or...

Страница 86: ...and password required for login to provider A from the PPP list When this is done the router can establish a connection to the router of the provider over the ISDN line Once the connection has been e...

Страница 87: ...er numbers in the round robin list If the remote station is available via a leased line the number for a dial up backup connection can be entered here Short hold These times indicate the length of tim...

Страница 88: ...es of the device Specifically they are The D channel protocol used on the S0 port Automatic recognition DSS1 Euro ISDN DSS1 point to point 1TR6 Group 0 leased line connections Leased line option B cha...

Страница 89: ...e main MSN of the connection will be transmitted Call acceptance Here you can restrict call acceptance to digital or analog calls Permit multiple simultaneous connections Here you can specify whether...

Страница 90: ...ring active call establishment No number is transferred by the LANCAPI if this number has not been specified or the number is invalid This option lets you transfer the first number entered in the Subs...

Страница 91: ...ist in the ELSA LANconfig can be found in the Communication configuration section on the Remote sites tab or under Setup WAN module RoundRobin list during Telnet or terminal sessions If a remote site...

Страница 92: ...number of channels is stated than the minimum dynamic channel bundling will be used for this connection The layer to be used must be set up for bundling in the layer 2 options Order The sequence in w...

Страница 93: ...list The connection is maintained if the name is present otherwise it will be rejected by number The call will only be accepted if the remote station is entered in the number list and the number is tr...

Страница 94: ...ll functions are supplied via the network without the necessity of additional hardware at each individual workstation thus eliminating the costs of equipping the workstations with ISDN adapters or mod...

Страница 95: ...cked All parameters can remain at their default settings if you are using only one ELSA LANCOM Business in your LAN as a LANCAPI server Start the LANCAPI client in the ELSAlan program group Informatio...

Страница 96: ...rom the telephone network should LANCAPI respond to Which of the computers in the local network should be able to access the telephone network via LANCAPI Set the relevant parameters as follows Start...

Страница 97: ...ncoming calls are reported to LANCAPI LANCAPI is preset to use port 75 any private telephony service Do not change this setting unless this port is already in use by a different service in your LAN If...

Страница 98: ...ed via the LANCAPI A fax program using the LANCAPI will then probably attempt to send again at a later time The connection via the LANCAPI can then be established when a main channel is free A main ch...

Страница 99: ...f standardfax programs with an ELSA LANCOM Business Installation The ELSA CAPI Faxmodem can be installed from the CD setup Always install the ELSA CAPI Faxmodem together with the current version of EL...

Страница 100: ...easily For example in its default state a maximum of 830 charge units may be used in six days The router will not permit the establishment of any further connections once this limit has been reached...

Страница 101: ...ctions can be disabled by entering a budget of 0 units or 0 minutes Only the router functions are protected by the charge and time monitoring functions Connections via LANCAPI are not affected 6 11 3...

Страница 102: ...upply additional information regarding the assignments of MAC addresses and computer names from the DHCP or DNS server modules if available In this case online times can be assigned directly to comput...

Страница 103: ...of the accumulated table based online time or transfer volume 6 12 2 Reading the accounting data ELSA LANmonitor provides the means of viewing the listed data It also allows you to save the data to a...

Страница 104: ...of the preselection of a given network or the placement of long distance calls on a call by call basis without a contract with a specific provider The prefix of the provider must be dialed to access...

Страница 105: ...h the entry is valid The time of day for which the entry is valid Initial tests It s possible to achieve a considerable savings with only a few entries We would like to describe the programming of the...

Страница 106: ...the highest possible level of control over the routing activities Start with the prefixes of the local area and then define the next larger zones The closer and thus less expensive tariff zones are s...

Страница 107: ...ivate the following operating modes for the least cost router as required The Router The LANCAPI If you have also activated least cost routing for the router module connections may be established via...

Страница 108: ...le using the ELSA LANCAPI Use the dialed number to verify whether the LCR settings suit your requirements For router connections check the log file for the number dialed LANmonitor View Options Protoc...

Страница 109: ...tablish a connection immediately upon being switched on in order to synchronize the time with that of the ISDN network Your ELSA LANCOM Business can automatically detect whether the remote station is...

Страница 110: ...Operating modes and functions ELSA LANCOM Business 6000 110 EN...

Страница 111: ...cate they need a physical medium through which the information can be transmitted This can be a cable or radio link for example that is connected to the computers using special interfaces e g network...

Страница 112: ...t to point connection One host transmits packets that can only be received by exactly one recipient unambiguous connection Access to the Internet is also established through point to point connections...

Страница 113: ...the recipient of the packet or not 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 a...

Страница 114: ...e data packet also contains address and control information IP address IP addresses are used in IP networks for communications between various devices In this case every host has its own unique addres...

Страница 115: ...e 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 network mask 255 2...

Страница 116: ...ample The same address can be used in other closed networks e g in different companies but the addresses within one network must be unique However these reserved IP addresses must not be made public o...

Страница 117: ...interface connection to the host for every host in the network You can imagine that as they grow these tables may exceed the capacity of the router the Internet as a worldwide linking up of publicly...

Страница 118: ...has to know how to reach Example Inc As soon as it receives a packet with the address for Example Inc it passes the packet on to the router responsible for Example Inc The router in Example Inc recei...

Страница 119: ...is 192 168 100 0 This is the network address of the Example Inc network The router recognizes that the recipient is located within Example Inc and passes the packet on to the appropriate interface fo...

Страница 120: ...n the LAN Since the LAN addresses are used for communication via the MAC protocol they are called MAC addresses They can be thought of as the fingerprint of the interface hardware MAC addresses can lo...

Страница 121: ...hind another router 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...

Страница 122: ...A4 6E Imagine wanting to send an IP packet from host Smith with IP address 137 226 4 10 and MAC address 00 10 5A 31 20 DF to host Miller with IP address 137 226 4 20 and MAC address 00 10 5A 31 20 EB...

Страница 123: ...and answers with an ARP response packet that it sends directly to host Smith The MAC address 00 10 5A 31 20 DF of host Smith is extracted from the sender field in the ARP request packet Host Smith re...

Страница 124: ...eached through the router The MAC address of router 00 80 C7 6D A4 6E finds out about its IP address by going through the ARP table if necessary another ARP request is made So host Smith tells its LAN...

Страница 125: ...dges to learn automatically about the location of computers in the network using the received packets This is called an intelligent bridge 7 3 Point to point protocol ELSA routers also support the poi...

Страница 126: ...of remote workstations with ISDN adapters Internet access when sending addresses The PPP which is implemented in ELSA LANCOM Business can be used synchronously or asynchronously not only via a transpa...

Страница 127: ...he logical connections for all protocols are cleared PPP negotiation in the ELSA LANCOM Business The progress of a PPP negotiation is logged in the devices PPP statistics and the protocol packets list...

Страница 128: ...serves this procedure Not the other way round This means that PAP CHAP or MS CHAP security is not useful when connecting to Internet service providers who may not wish to provide a password Select non...

Страница 129: ...of any short term line interference The line will be Retry Number of retries for the check attempt You can eliminate the effect of short term line interference by selecting multiple retries The conne...

Страница 130: ...remote station does not have its custom IP address e g the individual workstation of a teleworker then the ELSA LANCOM Business can assign an IP address for the duration of the connection thus making...

Страница 131: ...LANCOM Business also receives information via the DNS server of the provider during the PPP negotiation In the local network the ELSA LANCOM Business is only known by its internal valid Intranet addre...

Страница 132: ...l negotiation Thus a one unit charge is applied Name Before a callback occurs a protocol negotiation is always carried out even when the remote station was found in the numerical list e g for computer...

Страница 133: ...le settings are selected in the name list via the callback entry as well as the calling number entry Do not carry out any callbacks For this setting the callback entry must be set on Off when configur...

Страница 134: ...llback using ELSA Should two ELSA LANCOM Business communicate with each other whereby one is called back then rapid callback via ELSA specific procedures is provided The caller who may wish to be call...

Страница 135: ...ynamic channel bundling In the case of dynamic channel bundling the router initially establishes the number of B channels specified as Minimum in the channel list and starts the data transfer If the r...

Страница 136: ...d for a short time Customarily values between 60 and 180 seconds are a good base to begin with which one can continue to adjust during operation The B2 hold time determines the delay time after which...

Страница 137: ...number can be dialed without restrictions However the number must be clear beyond all accessible IPX networks in order to guarantee a correct allocation The MAC address is securely embedded in each n...

Страница 138: ...the both networks to be connected This applies to LAN address 1 WAN address 1 WAN address 2 LAN address 2 LAN address 1 Binding Here it is determined which Ethernet binding should be used on the WAN...

Страница 139: ...IPX network When a device logs on in an IPX network it sends a request to the service advertising protocol SAP and then locates the next accessible server Get Nearest Server Request in the network wi...

Страница 140: ...ased every 60 seconds by one A new RIP or SAP packet for an entry sets the age back to zero After an adjustable age from 1 to 60 the route or service is designated as inaccessible Down If double this...

Страница 141: ...exponential backoff algorithm prevents connections from being established thus saving costs If the first connection attempt to a remote station is not successful the router attempts to reach the remo...

Страница 142: ...t and source addresses but also target and source sockets Sockets designate the processes for which the data in the packet are determined For the sockets from local as well as remote networks there is...

Страница 143: ...tted without filters However these packets occupy a part of the connection line in all cases The RIP and SAP packets are only sent when there are changes in the information RIPs and SAPs can be transm...

Страница 144: ...he path of the data packet This procedure is also called static routing since you make these entries yourself and they remain unchanged until you either change or delete them yourself Naturally there...

Страница 145: ...address and network mask to this remote station A name is entered at this point if the remote station is a router in another network or an individual workstation computer This is where the IP address...

Страница 146: ...l Mask Use the masquerading option in the routing table to inform the router which IP addresses to use when transferring the packets Off No masquerading On This entry requests a random IP address vali...

Страница 147: ...data packet The destination port in a data packet stands for the service to be addressed in the TCP IP network The destination ports are fixed for the various services on the TCP IP network see also T...

Страница 148: ...ansmission of data to IP addresses takes place in the same logical network as the sender but the destination address is still reached via a router This is the case when individual workstation computer...

Страница 149: ...uter a response with the address of the router which knows the route to the destination network this response is known as an ICMP redirect The workstation computer then accepts this address and sends...

Страница 150: ...nection to the remote station has been established on this router which they can use The establishment of additional connections by routers with dial up connections can be prevented thus reducing conn...

Страница 151: ...ng 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 Now if the router receives an IP RIP packet it must decide whet...

Страница 152: ...e RIPs if this router holds the default route to a remote router This can be prevented by entering the RIP port in the filter tables Scaling with IP RIP If you use several routers in a local network w...

Страница 153: ...the connection and masquerading Static This entry requests a specific IP address entered under setup TCP from your provider which is then used for the connection and masquerading If a specific address...

Страница 154: ...ual Simple and inverse masquerading This masking operates in both directions The local network behind the IP address of the router is masked if a computer from the LAN sends a packet to the Internet s...

Страница 155: ...TTP etc UDP ICMP 7 7 DNS forwarding Names rather than IP addresses are generally used to access a server over the Internet Who knows which address is behind www domain com The DNS server of course DNS...

Страница 156: ...btain the name assignment This procedure also automatically updates the address of the DNS server Your local network always receives the most current information even if for example the provider sendi...

Страница 157: ...Tx RJ45 node hub switch auto sensing full duplex Network protocols IP router ARP Proxy ARP DHCP server IP ICMP UDP TCP RIP 1 RIP 2 Proxy DNS Proxy NetBIOS IP IPX router IPX SPX RIP SAP Novell NetBIOS...

Страница 158: ...ith ELSA LANmonitor and SYSLOG accounting of connections online time volume per IP with ELSA LANmonitor trace of protocols for diagnostic purposes Display operation LCD display and keypad LEDs for LAN...

Страница 159: ...6021 are the only models that feature this interface 8 pin RJ45 socket as per ISO 8877 Plug Pin No X 21 Direction Function 1 2 Txd transmit data 3 Ctrl control 4 Rxd receive data 5 Ind indicate 6 Set...

Страница 160: ...Base T 8 pin RJ45 socket as per ISO 8877 8 2 5 Configuration interface outband 8 pin RJ45 socket as per ISO 8877 assignment compatible to Cisco Connector RJ45 pin Line IAE 1 2 3 T 2a 4 R 1a 5 R 1b 6 T...

Страница 161: ...rmation Please note This device contains a permanently installed lithium battery Batteries containing hazardous substances must be disposed of properly Please be sure to return ELSA devices with perma...

Страница 162: ...Technical data ELSA LANCOM Business 6000 162 EN...

Страница 163: ...riate essential requirements of the FTEG Article 3 of R TTE and the other relevant provisions Harmonisierte Normen Gesundheit und Sicherheit gem 3 1 1 Artikel 3 1 a Harmonised Standards Health and Saf...

Страница 164: ...is six years This period begins at the day of delivery from the ELSA dealer Warranty services do not result in an extension of the warranty period nor do they initiate a new warranty period The warran...

Страница 165: ...f the legal basis are excluded This does not apply if e g injury to persons or damage to private property are specifically covered by the product liability law or in cases of intentional act or culpab...

Страница 166: ...Appendix ELSA LANCOM Business 6000 166 EN...

Страница 167: ...rotocol 57 BACP 49 Barring 54 Basic configuration 25 BRI 17 Broadcast address 115 Broadcast transfer 120 Brute force 54 Buttons 11 C Cable 111 Cable network 114 Call charge information 100 135 Call ch...

Страница 168: ...ion 67 Dialing prefix 105 Dial Up Networking 31 56 Distance of a route 146 DNS 69 155 DNS Forwarding 155 DNS forwarding mechanism 70 DNS server 61 64 69 available information 70 filter list 71 filter...

Страница 169: ...108 International calls 104 Internet 61 114 Internet access 126 131 Internet address 153 Internet connections 41 Internetwork 114 Intranet address 153 IP address 30 61 130 IP address administration 6...

Страница 170: ...l 120 Mail server 71 Medium Access Control 120 Messages 11 Microsoft Network 72 MLPPP 49 135 Mode 62 Monitoring 29 MS CHAP 125 127 Multilink PPP 49 126 135 Multipoint cabling 120 Multiprotocol capabil...

Страница 171: ...supply unit connection 13 PPP 30 48 56 125 135 Assigning IP addresses 130 Authenticate phase 126 Callback functions 125 131 checking the line with LCP 129 Establish phase 126 LCP Extensions 134 Negoti...

Страница 172: ...interface 13 ISDN S0 interface 13 X 21 interface 13 Status LED 12 13 Structured G 703 43 Subnet 117 T T1 43 TCP IP 113 144 TCP IP networks 69 TCP IP stack 114 Technical data 157 163 Telephone provider...

Страница 173: ...SA LANCOM Business 6000 EN Windows network 66 Windows network client 75 Windows Networking 80 WINS Address 66 WINS server 73 Wireless links 111 Wizards 25 X X 21 connection 12 X 21 interface 42 Y Y co...

Страница 174: ...Index ELSA LANCOM Business 6000 174 EN...

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