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ZyXEL Communications Prestige 128IMH Скачать руководство пользователя страница 103

Prestige 128IMH User’s Guide

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Page 13-1

13. SNMP

13.1. About SNMP

The Simple Network Management Protocol (SNMP) is a protocol governing network
management and the monitoring of network devices and their functions. The Prestige
supports the utilization of SNMP to regulate the communication that occurs between the
manager station and the agent stations in a network. The Prestige, when connected to the
LAN, acts as an agent station. In this way, the manager station on your LAN can monitor
the Prestige as it would another station on the network. Keep in mind that SNMP is only
available if TCP/IP is configured on your Prestige.

13.2. Configuring Your Prestige For SNMP Support

The following steps describe a simple setup procedure for configuring the SNMP
management.From the main menu, select number

22

to go to Menu 22 - SNMP

Configuration. You are then prompted to enter the information as described below in the
table

Figure 13-1 Menu 22 - SNMP Configuration

Menu 22 - SNMP Configuration

SNMP:
Get Community= public
Set Community= public
Trusted Host= 0.0.0.0
Trap:
Community= public
Destination= 0.0.0.0

Press ENTER to Confirm or ESC to Cancel:

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Содержание Prestige 128IMH

Страница 1: ...Prestige 128IMH User s Guide Version 1 0 ZyXEL TOTAL INTERNET ACCESS SOLUTION...

Страница 2: ...direct or consequential damages of any kind or character to the purchaser To obtain the services of this warranty please contact ZyXEL s Service Center refer to the separate Warranty Card for your Ret...

Страница 3: ...generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications If this equipment does c...

Страница 4: ...e by you to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconnect the equipment For their own protection users should ensure that the...

Страница 5: ...ZyXEL product or desire assistance contact ZyXEL Communications Corporation in one of the following ways METHOD NORTH AMERICA OUTSIDE NORTH AMERICA E Mail Tech Support support zyxel com See your local...

Страница 6: ...On Connection Cables 3 1 3 2 Connecting Your Computer and Your Prestige 3 1 3 3 Prestige Front Panel 3 4 3 4 Powering On Your Prestige 3 4 3 5 Navigating Through the SMT 3 5 4 INITIAL CONFIGURATION 4...

Страница 7: ...hout Server 9 2 9 4 IPX Spoofing 9 2 9 5 IPX Ethernet Setup 9 3 9 6 LAN to LAN Application 9 4 9 7 Static Route Setup 9 6 10 BRIDGING CONFIGURATION 10 1 10 1 IPX Spoofing 10 1 10 2 Bridge Ethernet Set...

Страница 8: ...16 1 System Status 16 1 16 2 System Information and Terminal Baud Rate 16 4 16 3 Log and Trace 16 5 16 4 Diagnostic 16 7 16 5 Backup Configuration 16 9 16 6 Restore Configuration 16 9 16 7 Upload Fir...

Страница 9: ...A Single User Account Using the Prestige 5 4 Figure 6 1 Menu 11 Remote Node Profile 6 1 Figure 6 2 Menu 11 1 Remote Node Profile 6 3 Figure 6 3 Remote Node Filter 6 5 Figure 6 4 Remote Node PPP Option...

Страница 10: ...15 1 Telnet Configuration on a TCP IP Network 15 1 Figure 16 1 Menu 24 System Maintenance 16 1 Figure 16 2 Example of Menu 24 1 System Maintenance Status 16 2 Figure 16 3 LAN Packet Which Triggered L...

Страница 11: ...1 Remote Node Network Layer Options Fields 9 6 Table 9 2 Fields in Edit IPX Static Route 9 7 Table 10 1 Remote Node Bridging Configuration Fields 10 3 Table 10 2 Edit Bridge Static Route Fields 10 5...

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Страница 13: ...security features 1 1 Features The Prestige 128IMH is packed with a number of features that give it the flexibility to provide a complete networking solution for almost any user 1 1 1 Built in V 90 M...

Страница 14: ...lows mobile users that have workstations with remote access capabilities to dial in to the Prestige using a standard V 90 modem to access network resources 1 1 8 Built in 4 Port Ethernet Hub The Prest...

Страница 15: ...b Configurator is a JAVA based utility designed to allow users to access the Prestige s management settings via a Worldwide Web browser 1 1 12 DHCP Support DHCP Dynamic Host Configuration Protocol all...

Страница 16: ...ige offers a Single User Internet Account feature This allows for unlimited users on the LAN Local Area Network to access the Internet concurrently for the cost of a single account Single User Account...

Страница 17: ...of the application it is important that you follow the steps outlined in Chapters 1 4 to correctly connect your Prestige to your LAN You can then refer to other chapters of the manual depending on wh...

Страница 18: ...ons software configured to the following parameters VT100 terminal emulation 9600 Baud rate No parity 8 Data bits 1 Stop bit After the Prestige has been successfully connected to your network you can...

Страница 19: ...Chapters 1 and 2 These chapters are designed as a guide for you to collect the necessary information about your ISDN phone line and the LAN to which the Prestige will be connected Once this informati...

Страница 20: ...estige 128IMH User s Guide Page 2 2 w q C 2 1 Road Map and Flow Below is a schematic flowchart It is intended to guide you through a successful installation of your Prestige Figure 2 1 Installation Fl...

Страница 21: ...ny installs your ISDN line please be sure to obtain and write down the following information for future use ISDN switch type ISDN telephone number s 2 3 Completing the Setup Information Worksheet Befo...

Страница 22: ...ill use both B channels to communicate If your Prestige is sharing the ISDN line with other devices then configure B Channel to Switch Unused Telephone Number s Record on the worksheet the telephone n...

Страница 23: ...hich IP address to assign to the Prestige contact your LAN administrator or refer to Chapter 4 of this guide for more details IP Subnet Mask This field is required for TCP IP protocol An IP address co...

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Страница 25: ...s connections Figure 3 1 Prestige Rear Panel 3 1 A Warning On Connection Cables Several of the connection cables RS 232 ISDN line and Ethernet cable are very similar to each other It is important that...

Страница 26: ...o the socket on the rear panel of the Prestige labeled ISDN and follow the instructions below for the other end S T interface This can only connect to your NT 1 Network Termination 1 device Warning Do...

Страница 27: ...required for you to run other applications using your Prestige Plug one end of the telephone cord from a telephone or fax or modem into the socket on the rear panel of the Prestige labeled PHONE 1 or...

Страница 28: ...EDs are on if there is an active WAN session on that channel or if that channel is making or receiving a call LAN 1 4 These LEDs blink to indicate when there is traffic over the corresponding port on...

Страница 29: ...ard to a Previous Menu Press the escape Esc key to move back to the previous menu The only exception is the main menu where typing 99 is the only method to exit from the SMT Moving the Cursor Within a...

Страница 30: ...shown below Figure 3 1 SMT Main Menu Copyright c 1994 1998 ZyXEL Communications Corp Prestige 128IMH Main Menu Getting Started Advanced Management 1 General Setup 21 Filter Set Configuration 2 ISDN Se...

Страница 31: ...uch that your Prestige can be a dial in server for the remote node and remote dial in user 14 Dial in User Setup Setup Remote Dial in User Prestige has eight Remote Dial in Users 15 SUA Server Setup S...

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Страница 33: ...ge e g LA office Contact Person s Name Enter the name up to 8 characters of the person in charge of this Prestige e g CC All the above three fields are optional Protocols Turn on or off the individual...

Страница 34: ...uropean Field Description Switch Type This field is fixed as DSS1 B Channel Usage In general this is Switch Switch If you are only using one B channel e g your Prestige is sharing the ISDN BRI line wi...

Страница 35: ...ng The three choices in this field are Multiple Subscriber Number MSN Called Party Sub Address CDSA and Don t care Analog Call Routing All analog calls are routed to the A B Adapter 1 if the setting i...

Страница 36: ...if you are using the U interface the system also takes slightly longer to initialize At this point the Prestige asks if you wish to test your ISDN If you select Yes the Prestige will perform a loop ba...

Страница 37: ...ter sets are used to block certain packets to reduce traffic and to prevent a security breach Filtering is a very involved subject so leave these fields blank for the time being After you have studied...

Страница 38: ...the address expressed in dotted decimal notation The Prestige automatically calculates this mask based on the IP address that you assign Unless you have special need for subnetting use the default su...

Страница 39: ...Prestige 128IMH User s Guide ZyXEL w q C Page 4 7...

Страница 40: ...e addresses are passed to the client computers on your network IP address Enter a unique IP address of the Prestige in dotted decimal notation IP Subnet Mask The Prestige automatically calculates this...

Страница 41: ...tup shown below Figure 4 3 Bridge Ethernet Setup Refer to Chapter 10 for a discussion on Bridging Configuration Menu 3 3 Novell IPX Ethernet Setup Seed Router No Frame Type 802 2 Yes IPX Network N A F...

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Страница 43: ...s ISDN access telephone number s Your Login name and Password ISP s gateway IP address optional ISP s Domain Name System DNS IP address Internet Prestige Static or Dynamic IP Address assigned by Inte...

Страница 44: ...t up for an ISDN leased line that is if any option but Switch Switch or Switch Unused is selected for the B Channel Usage control in setup menu 2 ISDN Setup and the Transfer Type control is set to Lea...

Страница 45: ...n Menu 4 Internet Access Setup After the SMT asks if you wish to test the Internet connection If you select Yes the Prestige will call the ISP to test the Internet connection If the test fails please...

Страница 46: ...less than 20 hosts on a LAN to concurrently access the Internet or other remote TCP IP network 2 SUA can provide one server address to be accessed by remote users 3 SUA can provide firewall protectio...

Страница 47: ...make inside servers for different services e g web or FTP visible to the outside users even though SUA makes your whole inside network appear as a single machine to the outside world A service is iden...

Страница 48: ...menu 15 1 SUA Server Configuration 3 Enter the service port number in the Port field and the inside IP address of the server in the IP Address field 4 Press ENTER at the Press ENTER to confirm prompt...

Страница 49: ...to Menu 11 Remote Node Setup When in menu 11 enter the number of the remote nodes that you wish to configure as shown below Default values are shown on the screens Figure 6 1 Menu 11 Remote Node Prof...

Страница 50: ...two authentication protocols PAP Password Authentication Protocol and CHAP Challenge Handshake Authentication Protocol PAP sends the user name and password in plain text CHAP scrambles the password be...

Страница 51: ...he field Incoming Call Back This field is valid only if Call Direction is Both Otherwise an N A appears in the field Ougoing My Login Name This is a required field if Call Direction is either Both or...

Страница 52: ...Yes brings you to Menu 11 3 Remote Node Network Layer Options For more information on filling out this screen refer to the chapter pertaining to your specific protocol Telco Options Transfer Type This...

Страница 53: ...s added and subtracted dynamically according to traffic demand The Prestige uses the Bandwidth Allocation Control Protocol BACP and the Multilink Protocol MP in implementing bandwidth on demand The co...

Страница 54: ...then traffic in either direction will be calculated to determine if a link should be added or dropped Transmit will only use outgoing traffic to make this determination and Receive will only use incom...

Страница 55: ...by a for subtracting and adding the second channel The default is 32 48 Multiple Link Options Add Persist This parameter specifies the number of seconds when traffic is above the adding threshold befo...

Страница 56: ...n menu 11 3 set the Remote Node s Subnet Mask to 0 0 0 0 and set RIP to None 5 Save the new configuration Once you have done this if you need to change from your primary ISP to a backup ISP follow the...

Страница 57: ...n to the Prestige directly from their workstations while remote nodes represent networks and are used for LAN to LAN connections This chapter discusses how to setup Default Dial in parameters for both...

Страница 58: ...llows the Prestige to provide services for workstations on a remote network For the Prestige to be set up as a dial in server you need to configure the Default Dial In Setup to set the operational par...

Страница 59: ...on describes how to configure the protocol independent fields in this menu For the protocol dependent fields please refer to the appropriate chapters The Telco Options CLID Authen field sets the CLID...

Страница 60: ...s field 64 At most one B channel is used 128 A maximum of two channels can be used When the Prestige calls back to the remote dial in user the maximum data transfer rate is always 64 In the Session Op...

Страница 61: ...rt Addr N A Recv Authen CHAP PAP IP Count 1 2 N A Compression Yes Mutual Authen No IPX Net Num Supplied By PAP Login N A IPX Pool No PAP Password N A IPX Start Net Num N A Multiple Link Options IPX Co...

Страница 62: ...an be used When the Prestige calls back to the remote dial in user the maximum data transfer rate is always 64 Callback Budget Management Allocated Budget min This field sets a budget callback time fo...

Страница 63: ...one in the pool IPX Count 2 16 In this field enter the number 2 16 of network numbers in the IPX Pool For example if the starting number is 12345678 and the count is 2 then the pool will have 1234567...

Страница 64: ...uthentication e g JohnDoe Active You can disallow dial in access to this user by setting this field to No When set to inactive you record is still kept in the database for later activation Deactivated...

Страница 65: ...o not match and the CLID Authen is Required then the Prestige will reject the call Idle Time out Enter the idle time in seconds The Idle Timeout sets the limit on the time that the connection is idle...

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Страница 67: ...tition a class C network number 192 168 1 0 into two you shift 1 bit from the host ID to the network ID Thus the new subnet mask will be 255 255 255 128 the first subnet will have network number 192 6...

Страница 68: ...remote LAN 8 2 1 Remote Node Setup Follow the procedures in Chapter 0 to fill the protocol independent parameters in Menu 11 1 Remote Node Profile For the TCP IP specific parameters follow the instru...

Страница 69: ...ther router into its routing table If set to In Only the Prestige will not broadcast its routing table on the WAN if set to Out Only the Prestige will broadcast its routing table but ignores any RIP b...

Страница 70: ...ute to this remote node in its RIP broadcasts If set to Yes this route is kept private and not included in RIP broadcast If No the route to this remote node will be propagated to other hosts through R...

Страница 71: ...s Without a route no packets can be forwarded to their destinations A static route is used to resolve this problem by providing the Prestige with some static routing information In the example below s...

Страница 72: ...Menu 12 Static Route Setup 1 IP Static Route 2 IPX Static Route 3 Bridge Static Route Please enter selection Menu 12 1 IP Static Route Setup 1 ________ 2 ________ 3 ________ 4 ________ 5 ________ 6 __...

Страница 73: ...bnet Mask Enter the subnet mask for this destination Please follow the discussion on IP subnet mask in this chapter Gateway IP Address Enter the IP address of the gateway The gateway is an immediate n...

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Страница 75: ...IPX routing environment it is important to correctly configure the network numbers on the LAN On any IPX network there is an external network number that is the number associated with the frame type...

Страница 76: ...estige is connected to a LAN without a NetWare server then you need to specify a unique external network number to apply to that frame on the LAN This Prestige must then be configured as a Seed Router...

Страница 77: ...rame type enabled Keep in mind that this number must not be used anywhere else on the entire internetwork The Prestige supports four frame types For every frame type that the Prestige needs to support...

Страница 78: ...selections or press ESC at any time to cancel your selections 9 6 LAN to LAN Application A typical LAN to LAN application is to use the Prestige to call from a branch office to headquarters such that...

Страница 79: ...e to make the outgoing call Rem LAN Net Enter the internal network number of the NetWare server on the remote side LAN The Prestige creates a route to access this server My WAN Net Enter the WAN netwo...

Страница 80: ...tion when the line is brought back up Table 9 1 Remote Node Network Layer Options Fields Once you have completed filling in the Network Layer Options Menu press ENTER to return to menu 11 1 Press ENTE...

Страница 81: ...ns the socket number on which the server receives service requests The default for this field is hex 0451 Type This field identifies the type of service the server provides The default for this field...

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Страница 83: ...RIP inquiry packets if set to Handle IPX as Client or None These call filters prevent the Prestige from making a call to the remote node thus preventing the expense of an unnecessary telephone call 10...

Страница 84: ...t in menu 11 2 to Yes to allow the client queries to trigger the call If they do not set it to Server Figure 10 1 Bridge Ethernet Setup When you are finished press ENTER at the message Press ENTER to...

Страница 85: ...etained then the Prestige will not have to re negotiate the protocol and recompile the tables when the connection is brought back up Table 10 1 Remote Node Bridging Configuration Fields Once you have...

Страница 86: ...selections or press ESC at any time to cancel your selections 10 3 3 Bridge Static Route Setup You can configure Bridge static routes for your Bridging applications as depicted in the screens below F...

Страница 87: ...e enter the IP address of the destination device that you wish to bridge your packets to Gateway Node Enter the number of the remote node that is the gateway for this static route When an incoming pac...

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Страница 89: ...ed to check with your telephone company to confirm if these services are available to you and if so if there is any additional charges for them 2 In some cases your telephone company may only enable t...

Страница 90: ...tly the same way it does on a regular analog line which almost everyone is familiar with After hearing a call waiting indicator tone press and immediately release the flash hook button on your telepho...

Страница 91: ...busy or if they don t answer simply hang up the telephone and pick it back up after it starts ringing to return to the 1st caller To drop the last call added to the three way call Simply press the fla...

Страница 92: ...ing call on hold and receive a dial tone b Dial the third party s telephone number Caller B c Before Caller B picks up the call you can transfer the call by pressing and immediately release the flash...

Страница 93: ...s through the data filters before they encounter the call filters Call filters are divided into two groups default call filters and user defined call filters Prestige has default call filters that fil...

Страница 94: ...filter sets Select the filter set you wish to configure This brings you to the Edit Comments field Whatever the comments are for that filter set are displayed in this field You can edit the comments...

Страница 95: ...enericor IP for TCP IP Filter Rules The filter rule parameters is displayed here see below M Refers to More Y means there are more rules to check N means there aren t m Refers to Action Matched F mean...

Страница 96: ...following abbreviations will be used Off Offset Len Length Table 12 3 IP Gen typeAbbreviations in Menu 21 2 If the filter type is IPX Novell IPX the following abbreviations will be used PT IPX Packet...

Страница 97: ...configure another type of filter rule you need to select the appropriate type by pressing SPACE bar under the Filter Type field and press ENTER This will bring you to the corresponding menu 12 4 1 TCP...

Страница 98: ...r in the IP mask that is used to mask the bits of the IP Address given in Destination IP Addr Destination Port Enter the destination port of the packets that you wish to filter The range of this field...

Страница 99: ...and Action Not Matched will be N A Log In this field you can determine if you wish to log the results of packets attempting to pass the filter rule These results are displayed on the System Log see C...

Страница 100: ...e 8 hexadecimal numbers like 1155ABF8 Value In this field specify in Hex the value that the Prestige should use to compare with the masked packet The value should align with Offset Since Length is giv...

Страница 101: ...the operation for the IPX packet None RIP Request RIP Response SAP Request SAP Response SAP Get Nearest Server Request SAP Get Nearest Server Response Figure 12 1 Menu 21 1 3 IPX Filter Rule Menu 21 3...

Страница 102: ...packets that you wish to filter This should be a 4 byte hex value Destination Source Socket Comp You can select what comparison quantifier you wish to use to compare to the value given in Destination...

Страница 103: ...on your LAN can monitor the Prestige as it would another station on the network Keep in mind that SNMP is only available if TCP IP is configured on your Prestige 13 2 Configuring Your Prestige For SN...

Страница 104: ...this field is configured then the Prestige will only respond to SNMP messages coming from this address If you leave the field blank default then the Prestige will respond to all SNMP messages it rece...

Страница 105: ...ime 14 2 Using RADIUS Authentication In addition to the Prestige s built in dial up user list which can hold up to eight users it also supports an external authentication server which may provide pass...

Страница 106: ...upport as described in the section below 14 2 2 Configuring the Prestige for RADIUS Authentication To configure the Prestige to use the RADIUS server set up in the previous section select option 23 Sy...

Страница 107: ...he client file in the RADIUS server s etc raddb directory Lines of the form Client Name Key 192 168 1 1 1234 should be added to the client file The Client Name field in the file gives the IP address o...

Страница 108: ...user record for joeuser so the regular user name password mechanism still works 14 3 Configuring the SMT Password Figure 14 1 Menu 23 1 System Security Change Password The following steps describe a s...

Страница 109: ...n on a TCP IP Network In order to configure your Prestige in this way you need to have assigned an IP Address to it and have it connected to your network Please see Chapter 1 for more information on a...

Страница 110: ...ministrator has been disconnected will you be able to telnet to the Prestige again 15 2 2 System Timeout When you are connected to the Prestige there is a system timeout of 5 minutes 300 seconds If yo...

Страница 111: ...ived To get to the System Status select number 24 to go to Menu 24 System Maintenance From this menu select number 1 System Status There are five commands in Menu 24 1 System Maintenance Status Enteri...

Страница 112: ...ts on this channel CLU Current Line Utilization percentage of current bandwidth used on this channel ALU Average Line Utilization average CLU for this channel Up Time time this channel has been connec...

Страница 113: ...he IP address on Channel 2 Chan 1 CLID shows the Caller ID of the peer on Channel 1 Chan 2 CLID shows the Caller ID of the peer on Channel 2 LAN Packet Which Triggered Last Call shows the first 48 oct...

Страница 114: ...ode refers to the one byte country code value in decimal notation Ethernet Address refers to the Ethernet MAC Media Access Control of your Prestige IP Address This is the IP address of the Prestige in...

Страница 115: ...t 3 to bring you to Menu 24 3 System Maintenance Log and Trace 3 You will be given two choices View Error Log Syslog and Accounting The following list describes the fields involved in the trace and lo...

Страница 116: ...s The Prestige sends three different types of syslog messages Call information messages i e CDR Error information messages and Session information messages Some examples of these messages are shown be...

Страница 117: ...ngs up the B1 line This is only applicable if the B1 line is currently in use Hang Up B2 Call This tool hangs up the B2 line This is only applicable if the B2 line is currently in use Reset ISDN This...

Страница 118: ...e Prestige places a manual call to the ISP remote node If everything is working properly you will receive an appropriate response Otherwise note the error message and consult your network administrato...

Страница 119: ...he configuration onto disk Procedure for downloading varies depending on the type of software used to access the Prestige but you must use the XMODEM protocol to perform the download 16 6 Restore Conf...

Страница 120: ...mware Do not attempt to utilize these menus unless you have the new router firmware and new router configuration file updates Selecting number 7 from Menu 24 Maintenance displays the following screen...

Страница 121: ...ait for Starting XMODEM upload message before activating Xmodem upload on your terminal 4 After successful firmware upload enter atgo to restart the router Warning Proceeding with the upload will eras...

Страница 122: ...over a period of time for each remote node remote dial in user callback only If the total outgoing call time exceeds the set limit future outgoing calls will not be made and the current call will be d...

Страница 123: ...How many times a busy or no answer telephone number is retried before it is put on the blacklist The default is 0 and the blacklist control is not enabled Retry Timer sec Elapsed time after a call fa...

Страница 124: ...node or remote dial in user callback will fail After each period the total budget is reset The default for the total budget is 0 minutes and the period is 0 hours This means no budget control You can...

Страница 125: ...of the call call This is the number of calls made to or received from that telephone number Max This is the length of time of the longest telephone call Min This is the length of time of the shortest...

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Страница 127: ...ld contact technical support 17 1 2 You cannot access the SMT via the console port Check to see if the Prestige is connected to your computer s serial port Check to see if the communications program i...

Страница 128: ...with the LAN Interface 17 3 1 You can t PING any station on the LAN 1 Check the LAN LED on the front panel of your Prestige If it is on then the link is up If it is off then check the cable connecting...

Страница 129: ...st verify that you have configured the authentication parameters in menu 13 These would be CLID Authen Recv Authen and Mutual Authen 2 In menu 14 verify the user name and password for the remote dial...

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Страница 131: ...l Usage q Switch Switch q Switch Unused North America ISDN Switches AT T Northern Telecom 1st Phone Number 1st SPID Number Analog Call q Phone1 q Phone2 q DOVBS 2nd Phone Number 2nd SPID Number Analog...

Страница 132: ...us Incoming Number Matching q MSN q CDSA q Don t Care Analog Call Routing q A B 1 q A B 2 q Ignore Global Analog Call q Accept q Ignore Ethernet Setup Information Ethernet Interface q UTP q AUI IP Add...

Страница 133: ...entifies a computer network device or network resource Agent The subsystem in a managed network device that is responsible for responding to SNMP requests and commands and for sending SNMP traps Apple...

Страница 134: ...of the transmission medium and whether or not the cable includes transmission leakage shielding Collision Simultaneous data transmission on a network medium resulting in a garbled and unreadable trans...

Страница 135: ...ctions but one at a time not simultaneous Ethernet A particular type of LAN described in a standard 802 3 established by the IEEE with 10Mbps data transmission Fast Ethernet An extension of Ethernet L...

Страница 136: ...etwork an interconnected set of computers and other devices LED Light Emitting Diode an electronic device that lights up when electricity is passed through it LEDs are commonly used for status indicat...

Страница 137: ...f software used for remotely monitoring and managing network devices Out of Band Communications with a network device using some medium other than the network itself Packet An addressed segment of dat...

Страница 138: ...protocol for remotely monitoring and controlling network devices from a Network Management System NMS SNMP requests are usually transmitted using TCP IP though other means are possible Store and Forw...

Страница 139: ...ap An SNMP request that managed network devices send to network management stations to inform them that some problem has been detected Twisted pair Wire such as is commonly used with telephones consis...

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Страница 141: ...2 Dynamic Host Configuration Protocol 4 6 FCC Information iii frame 9 1 9 3 9 4 Front panel LED s 3 4 idle timeout 7 9 Internet 1 4 IP Address 2 5 4 6 IP Subnet Mask 2 5 4 6 8 1 IPX 1 2 1 4 4 5 6 4 7...

Страница 142: ...er Account 1 1 1 4 3 7 5 3 5 4 5 5 SMT 3 5 3 6 3 7 5 1 5 3 14 1 14 4 17 1 SNMP 3 7 13 1 13 2 SPID 2 4 spoofing 9 2 9 6 10 1 SUA See Single User Account switch types 1 1 2 4 4 2 17 2 System Management...

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