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Cayman 2E-H-W User’s Guide

Glossary

November 2000

9

subnet mask

A 32-bit address mask that identifies which bits of an IP address
represent network address information and which bits represent
node identifier information.

synchronous
communication

Method of data communication requiring the transmission of timing
signals to keep PPP peers synchronized in sending and receiving
blocks of data.

T1 link

Digital transmission link capable of speeds up to 1544 kilobits per
second.

TA

Terminal adaptor. Device that connects a network or terminal to an
ISDN network.

Telnet

IP protocol that lets a user on one host establish and use a virtual
terminal connection to a remote host.

twisted pair

Cable consisting of two copper strands twisted around each other.
The twisting provides protection against electromagnetic
interference.

UTP

Unshielded twisted pair cable.

VJ

Van Jacobson. Abbreviation for a compression standard
documented in RFC 1144.

WAN

Wide Area Network. Private network facilities, usually offered by
public telephone companies but increasingly available from
alternative access providers (sometimes called Competitive Access
Providers, or CAPs), that link business network nodes.

WWW

World Wide Web.

xon/xoff

Special characters used for software flow control to regulate
communication between a device and a modem.

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Содержание 2E-H-W

Страница 1: ...Cayman 2E H W User s Guide Release 5 6 2 November 2000 ...

Страница 2: ... pertaining to distribution of the software without specific written prior permission CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS IN NO EVENT SHALL CMU BE LIABLE FOR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE DATA OR PROFITS WHETHER IN AN ACTI...

Страница 3: ...ing Up Your Cayman 2E H W Unpacking Your Cayman 2E H W 2 1 Connecting Your Cayman 2E H W 2 2 Step 1 Position the Cayman 2E H W 2 2 Step 2 Connect Your Local Devices 2 3 Step 3 Connect Your Wide Area Network 2 4 Step 4 Connect Your Wireless Antenna HomeRF version only 2 4 Step 5 Power On the Cayman 2E H W 2 5 Disconnecting Your Cayman 2E H W 2 5 3 Configuring Your Cayman 2E H W Gathering Configurat...

Страница 4: ...ring SNMP Settings 3 34 4 Using the Command Line Interface Overview 4 1 Starting and Ending a CLI Session 4 1 Using the CLI Help Facility 4 4 Saving Settings 4 4 About Root Commands 4 4 ROOT Prompt 4 4 ROOT Command Shortcuts 4 5 ROOT Commands 4 5 About CONFIG Commands 4 14 CONFIG Mode Prompt 4 14 Navigating the CONFIG Hierarchy 4 15 Entering Commands in CONFIG Mode 4 16 Displaying Current Router S...

Страница 5: ...c Log 5 3 Displaying IP ARP Statistics 5 4 Displaying IP Interface Statistics 5 5 Displaying IP Routes 5 6 Displaying DHCP Server Statistics 5 7 Displaying DHCP Client Statistics 5 8 Displaying Memory Statistics 5 9 Displaying Ethernet Statistics 5 10 Displaying PPPoE Statistics 5 11 Displaying Wireless Statistics 5 12 Using the Diagnose Utility 5 13 6 Updating Your System Software Using the Home ...

Страница 6: ...mands B 5 Boot Setting Commands B 7 C How Your Cayman 2E H W Works About Network Address Translation C 1 About Bridging C 2 TCP IP Routing C 2 Bridging C 2 About DHCP C 3 Cayman 2E H W as DHCP Server C 4 Cayman 2E H W as DHCP Client C 4 About PPP C 5 How PPP Works C 5 Phases of a PPP Link C 5 PPP and Routing Tables C 10 About PPP over Ethernet PPPoE C 13 Advantages of PPPoE C 13 PPP over Ethernet ...

Страница 7: ...This manual is intended for network or system administrators responsible for setting up and maintaining the hardware and software to connect Ethernet networks What This Manual Covers Here s what you will find in this manual Chapter 1 About Your Cayman 2E H W presents an overview of the features ports and LEDs on your Cayman 2E H W Chapter 2 Setting Up Your Cayman 2E H W describes how to unpack you...

Страница 8: ...Console describes how to connect a terminal to the Cayman 2E H W maintenance console port and how to use the Cayman 2E H W diagnostic console to display and modify the device s boot settings Appendix C How Your Cayman 2E H W Works presents background information on how the Cayman 2E H W supports address mapping bridging and the Dynamic Host Control Protocol DHCP Documentation Conventions This manu...

Страница 9: ...for an argument are presented in curly brackets with values separated with vertical bars Variables for which you must supply your own values are presented in italic terminal type face Notes calling attention to important points are presented in italic type with a Note icon ...

Страница 10: ...Preface Cayman 2E H W User s Guide x November 2000 ...

Страница 11: ...meRF wireless devices to create high speed networks that do not require Ethernet cabling An integrated eight port Ethernet hub on the Cayman 2E H W front panel that lets you add or move workgroup network connections quickly and easily An auto configuring Internet router that incorporates Cayman s Swift IP technology What s New in Release 5 6 2 Support for RIP version 2 with MD5 authentication prov...

Страница 12: ...Cayman 2E H W direct NAT traffic to a specified host on your network Network AddressTranslation NAT conceals the topology of your local area network from outside hackers while offering full Internet access to LAN clients Dynamic Host Configuration Protocol DHCP client functionality lets a host on your Wide Area Network WAN configure the IP address and other network settings for theWAN interface on...

Страница 13: ...tomatically warn you if an administrator password has not been set Security features include restrictions on access to the Cayman 2E H W through its WAN port limitations on packets addressed to an interface s broadcast address and enhanced handling of spoofed IP addresses Ability to install new software images from the Cayman 2E H W Home page Support for Checkpoint and Nortel Contivity virtual pri...

Страница 14: ...n 2E H W to a power supply The wireless LED flashes when a packet is sent or received over the wireless network port Eight 10BaseT Ethernet hub ports lets you connect network devices within a workgroup Each hub port has an integrated LED that remains on when the Cayman 2E H W is connected to the device and that flashes when a packet is sent or received over the associated hub port The WAN LED flas...

Страница 15: ...E H W to a terminal or personal computer running a terminal emulation application to configure its operating settings with the command line interface described in Chapter 4 If you have the HomeRF version of the Cayman 2E H W the antenna port lets you connect the external wireless antenna to your Cayman 2E H W The power port lets you connect the Cayman 2E H W to an electrical power supply Transform...

Страница 16: ...About Your Cayman 2E H W Cayman 2E H W User s Guide 1 6 November 2000 ...

Страница 17: ...packing Your Cayman 2E H W The first thing you should do when you receive the Cayman 2E H W package is confirm that you have everything you should Remove all the materials from the shipping carton and verify that you have the following The Cayman 2E H W server in a protective bag Power transformer U S or international Cayman 2E H W installation CD ROM Cayman 2E H W QuickStart and other documentati...

Страница 18: ... Connecting Your Cayman 2E H W The 10Base T Ethernet ports on the front panel of the Cayman 2E H W let you connect the personal computers printers and other network devices in your workgroup The 10Base T Ethernet port on the rear panel of the Cayman 2E H W is used to connect the device to your corporate network wide area network or the Internet Step 1 Position the Cayman 2E H W Position the Cayman...

Страница 19: ... of the cable to the Ethernet port on a personal computer or other networked device You can connect your network devices to any of the Cayman 2E H W Ethernet hub ports Figure 2 2 Connecting the Cayman 2E H W to Your LAN If you require more than eight Ethernet hub ports you can connect your Cayman 2E H W to another Ethernet hub To do so use a standard twisted pair Ethernet cross over cable to conne...

Страница 20: ...at links you to your corporate network wide area network or the Internet Figure 2 3 Connecting Your Cayman 2E H W to Your WAN Step 4 Connect Your Wireless Antenna HomeRF version only If you are setting up the HomeRF version of the Cayman 2E H W insert the antenna plug into the antenna jack on the Cayman 2E H W back panel until you feel it lock Figure 2 4 For best results position the antenna on a ...

Страница 21: ...mer compatible with local electrical power specifications Contact your authorized router vendor for information on appropriate transformers Disconnecting Your Cayman 2E H W Complete the following steps to disconnect your Cayman 2E H W from your Ethernet networks Return the Cayman 2E H W to its original carton if you are moving it to a different location 1 Warn and disconnect network users Before y...

Страница 22: ...thernet devices Disconnect the Ethernet cables from the LAN ports on the Cayman 2E H W front panel 4 Disconnect the Cayman 2E H W from your WAN network Disconnect the Ethernet cable from the WAN port on the Cayman 2E H W back panel 5 HomeRF version only Disconnect the external antenna cable from the Cayman 2E H W back panel ...

Страница 23: ...man 2E H W Gathering Configuration Information Configuring Your Computer Opening a Web Connection Entering Basic Settings Entering LAN Ethernet A Settings Entering WAN Ethernet B Settings Configuring Password Settings Configuring Pinhole Settings Configure Wireless Settings Configuring SNMP Settings ...

Страница 24: ...uickStart Information You can print the following table and use it to enter information in the Cayman 2E H W QuickStart window Field Name Description Your Information System Name The name used to identify your Cayman 2E H W on your network Default is Cayman 2E serialnumber Wireless ID The name used to identify your Cayman 2E H W to wireless network clients Default for HomeRF networks which is base...

Страница 25: ...end network traffic when it can t find the destination host Blank by default Domain Name The name of the DNS domain you access most frequently Blank by default Primary Nameserver Address The IP address of the primary DNS name server for your network Default is 0 0 0 0 Secondary Nameserver Address The IP address of the backup DNS name server for your network Default is 0 0 0 0 Field Name Descriptio...

Страница 26: ...n 2E H W forwards DHCP requests and responses to a remote DHCP server Start Address expert mode The first IP address the Cayman 2E H W should assign for Dynamic Host Control Protocol clients Applicable when DHCP Mode is set to Server Default is 192 168 1 1 End Address expert mode The last IP address the Cayman 2E H W should assign for Dynamic Host Control Protocol clients Applicable when DHCP Mode...

Страница 27: ...MM SS format for which a configuration issued by the Cayman 2E H W DHCP server is valid Applicable when DHCP Mode is set to Server Default is 00 01 00 00 one hour Server Address expert mode The IP address the remote DHCP server to which your Cayman 2E H W will relay Dynamic Host Control Protocol address requests Applicable when DHCP Mode is set to Relay agent Field Name Description Your Informatio...

Страница 28: ...Cayman 2E H W If you are using Windows 95 Windows 98 Windows NT a Open the Network Control Panel and select theTCP IP service for the Ethernet card in your computer for example TCP IP 3Com EtherLink III b Open the Properties window Net Mask Subnet mask in use for the network connected to the WAN Ethernet B port Default is typically 255 255 255 0 Network Address Translation NAT On Off Specifies whe...

Страница 29: ...dress of the Cayman 2E H W 192 168 1 254 in the Name Server Address text box d Click OK If you are using a Macintosh running MacTCP a Open the MacTCP Control Panel and select the Ethernet interface icon b Enter 192 168 1 x where x is any number in the range 1 253 in the IP Address text field c Click the More button d Click the Obtain Address Manually radio button e Enter 192 168 1 254 in the Gatew...

Страница 30: ...igure the wireless network hardware and software For information on installing and configuring your wireless network software in your laptop refer to the ConfiguringYour PC for HomeRF or the ConfiguringYour PC for 802 11 Wireless Networking manuals Opening a Web Connection You use a Web browser such as Netscape Navigator or Microsoft Internet Explorer to open a connection to your Cayman 2E H W To ...

Страница 31: ...nd click OK The Cayman 2E H W Home window Figure 3 1 opens By default you are in Novice Mode and PPP over Ethernet PPPoE is turned off which is appropriate for most users Figure 3 1 Cayman 2E H W Home Window Novice Mode If you enable PPPoE the Cayman 2E H W Home window refers to the WAN port as Ethernet B PPPoE instead of Ethernet B WAN Figure 3 2 Figure 3 2 Cayman 2E H W Home Window PPPoE turned ...

Страница 32: ...utton restarts your Cayman 2E H W causing it to load any updated configuration information you have saved The Help button opens a window explaining how to access the Cayman 2E H W online help system The Ethernet A LAN button opens the EthernetA window which lets you configureTCP IP address settings for the Ethernet A port on the Cayman 2E H W The Ethernet B WAN Ethernet B PPPoE button opens the Et...

Страница 33: ...net B port the Cayman 2E H W QuickStart window asks you only for the name you want to assign your Cayman 2E H W If you have overridden the default settings for IP address information for Ethernet Port B and entered IP address information manually you can use the Cayman 2E H W QuickStart window to display and modify those settings QuickStart PPPoE Off To display the QuickStart window Figure 3 4 cli...

Страница 34: ...E H W You must configure other devices on your wireless network to use this identifier before they can communicate with your Cayman 2E H W 802 11 wireless network The default 802 11 wireless ID for a Cayman 2E H W consists of the word Cayman 2E and the serial number of the device You must configure other devices on your 802 11 wireless network to use this identifier before they can communicate wit...

Страница 35: ...me for a Cayman 2E H W consists of the word Cayman 2E and the serial number of the device A device name can be 1 32 characters long and cannot include spaces or special characters 2 Enter the identifier for your Cayman 2E H W on your HomeRF or 802 11 wireless network in the Wireless ID field HomeRF wireless network The default HomeRF wireless ID for a Cayman 2E H W consists of two four digit numbe...

Страница 36: ...h bits of the 32 bit binary IP address represent network information Most sites should use 255 255 255 0 for their subnet mask 5 Enter the IP address of the default gateway for your network in the Default Gateway field The default gateway is the host to which the Cayman 2E H W will send packets if it does not know how to reach a destination host 6 Enter your domain name in the Domain Name field Do...

Страница 37: ...by your Internet Service Provider 9 Click the Save button to store your modified configuration in the Cayman 2E H W memory 10 Click the Restart Cayman 2E button on the Cayman 2E H W Home Page to restart your Cayman 2E H W with its new configuration QuickStart PPPoE On If your Cayman 2E H W is configured to use PPPoE PPP over Ethernet framing the PPPoE QuickStart window Figure 3 6 opens when you cl...

Страница 38: ...our Cayman 2E H W 802 11 wireless network The default 802 11 wireless ID for a Cayman 2E H W consists of the word Cayman 2E and the serial number of the device You must configure other devices on your 802 11 wireless network to use this identifier before they can communicate with your Cayman 2E H W 3 Enter the login name you want your Cayman 2E H W to send when the PPP link is being established in...

Страница 39: ... Configuration window lets you enter TCP IP configuration information for the LAN EthernetA interface on your Cayman 2E H W The Cayman 2E H W provides default settings that are appropriate for networks that do not already have TCP IP addresses If your network falls into this category do not change the LAN Ethernet settings To display the Ethernet Port LAN Configuration window Figure 3 7 click the ...

Страница 40: ...you will see a set of DHCP fields on the Ethernet Port Configuration LAN window If you did not turn on Expert Mode you can skip to Step 8 below If you use the Cayman 2E H W as a DHCP server you should assign IP addresses outside the DHCP address range to devices requiring static IP addresses Before the Cayman 2E H W assigns an IP address to a DHCP client it verifies that no other device is using t...

Страница 41: ... day hour minute second DD HH MM SS format 7 If you chose Relay agent in Step 3 specify the IP address the remote DHCP server to which your Cayman 2E H W will relay Dynamic Host Control Protocol address requests in the Server Address field 8 Click the Save button to store your modified configuration in the Cayman 2E H W memory 9 Click the Restart Cayman 2E button on the Cayman 2E H W Home Page to ...

Страница 42: ...Ethernet B WAN button on the Cayman 2E H W Home Page Figure 3 8 Ethernet Port B WAN Configuration Window To configure settings for the WAN Ethernet B port 1 Enter the IP address of the Cayman 2E H W s WAN Ethernet port in the Local Address field If you want to specify the IP address for Ethernet Port B make sure you enter an address that is not being used by another device on your network If you w...

Страница 43: ...address translation 4 Use the Admin Restrictions list to specify whether the Cayman 2E H W accepts administrative commands received over the WAN port Options are None All traffic is accepted over this port Admin Disabled Router traffic is accepted over this port but administration commands are ignored 5 Click the Save button to store your modified configuration in the Cayman 2E H W memory 6 Click ...

Страница 44: ...t match the CHAP username configured in the remote PPP peer s authentication database 2 Enter the password you want your Cayman 2E H W to send when the PPP link is being established in the PPP Password field This is the PAP password or CHAP secret the Cayman 2E H W sends The information you enter must match the PAP password CHAP secret configured in the remote PPP peer s authentication database 3 ...

Страница 45: ...field If you specify an IP address other than 0 0 0 0 your Cayman 2E H W will not negotiate its IP address with the remote peer If the remote peer does not accept the IP address you specify in the Local Address field the link will not come up 6 Enter the IP address of the peer on the other end of the PPP link in the Peer Address field The default value for the Peer Address field is 0 0 0 0 which i...

Страница 46: ...blish different levels of access security to protect your Cayman 2E H W settings from unauthorized display or modification Admin level access lets you display and modify all settings in the Cayman 2E H W User level access lets you display but not change settings in the Cayman 2E H W You must assign the Cayman 2E H W an Admin password before you can assign it a User password You will see a warning ...

Страница 47: ...e of password you want to enter You can choose Admin or User You must assign the Cayman 2E H W an Admin password before you can assign it a User password 2 If you assigned a password to the Cayman 2E H W previously enter your current password in the Old Password field 3 Enter your new password in the New Password field A password can be as many as eight alphanumeric characters Passwords are case s...

Страница 48: ...specific host on the Cayman 2E H W s LAN network transparently To set up NAT pinholes you identify the type s of traffic you want to redirect by port number and you specify the internal host to which each specified type of traffic should be directed The following list identifies protocol type and port number for commonTCP IP protocols FTP TCP 21 Telnet TCP 23 SMTP TCP 25 TFTP UDP 69 SNMP TCP 161 U...

Страница 49: ... 80 in this field After you have made this change you will need to use this port number to open a Web connection to the Cayman 2E H W For example if you change the Web HTTP port to 1080 on a Cayman 2E H W using its default IP address 192 168 1 254 you would open a web connection to the device by entering the URL http 192 168 1 254 1080 2 Enter the number identifying the port used by the router to ...

Страница 50: ...create a specific NAT pinhole for a traffic stream because you cannot anticipate what port number an application might use For example some network games select arbitrary port numbers when a connection is being opened By identifying your computer or another host on your network as a NAT default server you can specify that NAT traffic that might otherwise be discarded by the Cayman 2E H W should be...

Страница 51: ...orwarded to another host 9 Enter the ending number of the external port range over which incoming traffic will be received in the Ext Port End field For example you would enter 23 to indicate you wantTelnet traffic forwarded to another host 10 Enter the IP address of the internal host to which traffic of the specified type s should be transferred in the Int IP Addr field 11 Enter the port number y...

Страница 52: ...e your Cayman 2E H W as a basestation for HomeRF or 802 11 wireless networking Your Cayman 2E H W bridges your wireless network functions to your Ethernet local area network letting computers on the wireless network access the Internet and share LAN resources such as printers and servers TheWireless Setup window lets you enter identification information for your Cayman 2E H W HomeRF Settings To di...

Страница 53: ...r Cayman 2E H W You must configure other devices on your wireless network to use this identifier before they can communicate with your Cayman 2E H W 2 Click the Save button to store your modified configuration in the Cayman 2E H W memory 3 Click the Restart Cayman 2E button on the Cayman 2E H W Home Page to restart your Cayman 2E H W with its new configuration 802 11 Settings To display the Wirele...

Страница 54: ...r Cayman 2E H W on the wireless network in the Wireless ID ESSID field You must configure all devices on your wireless network to use the identifier you enter here 2 Specify the radio channel you want your Cayman 2E H W to use by entering a number in the range 1 11 in the Default Channel field By default your Cayman 2E H W uses channel 7 which uses a frequency of 2442MHz You should not change this...

Страница 55: ...ant your Cayman 2E H W to use to encrypt decrypt messages WEP is a method of encrypting network traffic to protect it from snooping You can enter two 40 bit encryption keys and two 128 bit encryption keys If you use encryption all wireless network devices must haveWEP enabled and must use the same encryption key you select here Channel Frequency Geographic Usage 1 2412 MHz US Canada ETSI 2 2417 MH...

Страница 56: ... a client must have the same encryption keys as your Cayman 2E H W to pass authentication 6 Click the Save button to store your modified configuration in the Cayman 2E H W memory 7 Click the Restart Cayman 2E button on the Cayman 2E H W Home Page to restart your Cayman 2E H W with its new configuration Configuring SNMP Settings The Simple Network Management Protocol SNMP lets a network administrat...

Страница 57: ... person responsible for the Cayman 2E H W 2 Enter information about the system location in the System Location field For example you might enter the building floor or room number where the Cayman 2E H W is located 3 Click the Save button to store your modified configuration in the Cayman 2E H W memory 4 If you want the Cayman 2E H W to use authentication traps click the Authentication Traps On rad...

Страница 58: ... identify the destinations to which the Cayman 2E H W should send SNMP trap messages Enter the IP address of a host acting as an SNMP console in the IP Address field 7 Optionally enter the name of the community for which the trap destination is responsible in the Community field The optional community name identifies the name of the Cayman 2E H W community which is included in the trap message the...

Страница 59: ...ion You can use the command line interface to enter and update a Cayman 2E H W s configuration settings monitor its performance and restart it Starting and Ending a CLI Session You can open a command line interface session by opening aTelnet connection from a workstation on your network or by connecting a terminal to the console port on the Cayman 2E H W Connecting from Telnet You initiate a Telne...

Страница 60: ...nance Console Port You can connect a terminal or terminal emulator to the maintenance console port on the Cayman 2E H W to configure administer and monitor your Cayman 2E H W To use the Cayman 2E H W console you need a serial cable and either a terminal or terminal emulator such as a personal computer with a terminal emulation application that supports 9600 baud communication To connect your Cayma...

Страница 61: ...nterface Logging In The command line interface log in process emulates the log in process for a UNIX host If your Cayman 2E H W has been assigned an administrator password or user password you must enter a username up to 32 characters and your password Entering your username lets the Cayman 2E H W record your access your username is not used to validate your authorization Entering the administrato...

Страница 62: ...help command to h or a question mark when you request help for a CLI command Saving Settings The save command saves the working copy of the settings to restart values You can save the changes you have entered for a specific function or for all functions in the Cayman 2E H W The Cayman 2E H W automatically validates its settings when you save and displays a warning message if the configuration is n...

Страница 63: ...use the command to repeat the last command you entered ROOT Commands arp nnn nnn nnn nnn Sends an Address Resolution Protocol ARP request to match the nnn nnn nnn nnn IP address to an Ethernet hardware address clear yes Clears the configuration settings in a Cayman 2E H W If you do not use the optional yes qualifier you are prompted to confirm the clear command configure Puts the command line inte...

Страница 64: ...server_address argument identifies the IP address of the TFTP server from which you want to copy the Cayman 2E H W configuration file The filename argument identifies the path and name of the configuration file on theTFTP server If you include the optional confirm keyword the download begins as soon as all information is entered install server_address filename confirm Downloads a new version of th...

Страница 65: ...want the Cayman 2E H W to record If you enter the loglevel command without the optional level argument the command line interface displays the current log level setting You can enter the loglevel command with the level argument to specify the types of diagnostic messages you want to record All messages with a level number equal to or greater than the level you specify are recorded For example if y...

Страница 66: ...you want DNS information for example nslookup klaatu The ip_address argument is the IP address in dotted decimal notation of the device for which you want DNS information ping s size c count hostname ip_address Causes the Cayman 2E H W to issue a series of ICMP Echo requests for the device with the specified name or IP address The hostname argument is the name of the device you want to ping for ex...

Страница 67: ...eAddress Resolution Protocol ARP cache on your Cayman 2E H W reset crash Clears crash dump information which identifies the contents of the Cayman 2E H W registers at the point of system malfunction reset dhcp client release Releases the DHCP lease the Cayman 2E H W is currently using to acquire the IP settings for its WAN Ethernet B port reset dhcp client renew Renews the DHCP lease the Cayman 2E...

Страница 68: ...Ethernet On older versions of the Cayman 2E H W the reset ppp command initializes the modem connected to the serial port restart seconds Restarts your Cayman 2E H W If you include the optional seconds argument your Cayman 2E H W will restart when the specified number of seconds have elapsed You must enter the complete restart command to initiate a restart show bridge interfaces Displays bridge int...

Страница 69: ...e for use show dhcp server store Displays the DHCP leases stored in NVRAM by your Cayman 2E H W show enet Displays the Ethernet statistics for your Cayman 2E H W show ip arp Displays the Ethernet address resolution table stored in your Cayman 2E H W show ip igmp Displays the contents of the IGMP GroupAddress table and the IGMP Report table maintained by your Cayman 2E H W show ip interfaces Displa...

Страница 70: ...show status Displays the current status of a Cayman 2E H W the device s hardware and software revision levels a summary of errors encountered and the length of time the Cayman 2E H W has been running since it was last restarted Identical to the status command show wireless Displays status and statistics information for the wireless interface on your Cayman 2E H W The statistics displayed depend on...

Страница 71: ...ace for example traceroute ftp cayman com The ip_address argument is the IP address in dotted decimal notation of the device you want to trace Dogzilla traceroute 192 168 1 10 Traceroute to 192 168 1 10 from local address 192 168 1 254 timer gran 100 ms traceroute to 192 168 1 10 30 hops max 56 byte packets 1 192 168 1 10 0 ms 0 ms 0 ms upload server_address filename confirm Copies the current con...

Страница 72: ... of the command line interface by typing configure or any truncation of configure such as c or config at the CLI ROOT prompt CONFIG Mode Prompt When you are in CONFIG mode the CLI prompt consists of the name of the Cayman 2E H W followed by your current node in the hierarchy and two right angle brackets For example when you enter CONFIG mode by typing config at the ROOT prompt the Dogzilla top pro...

Страница 73: ...ring ip and pressing RETURN Dogzilla top ip Dogzilla ip As a shortcut you can enter the significant letters of the node name in place of the full node name at the CONFIG prompt The significant characters of a node name are the letters that uniquely identify the node For example since no other CONFIG node starts with I you could enter one letter i to move to the IP node Dogzilla top i Dogzilla ip J...

Страница 74: ...Dogzilla ip gateway Scrolling backward and forward through recent commands You can use the Up and Down arrow keys to scroll backward and forward through recent commands you have entered When the command you want appears press Enter to execute it Entering Commands in CONFIG Mode CONFIG commands consist of keywords and arguments Keywords in a CONFIG command specify the action you want to take or the...

Страница 75: ...NFIG verbs to three characters set vie del CONFIG verbs are case insensitive You can enter SET Set or set Keywords Keywords are case insensitive You can enter Ethernet ETHERNET or ethernet as a keyword without changing its meaning Keywords can be abbreviated to the length that they are differentiated from other keywords Argument Text Text strings can be as many as 32 characters long unless otherwi...

Страница 76: ...ete CLI commands When you are in step mode the command line interface prompts you to enter required and optional settings If a setting has a default value or a current setting the command line interface displays the default value for the command in parentheses If a command has a limited number of acceptable values those values are presented in brackets with each value separated by a vertical line ...

Страница 77: ...nfiguration CONFIG Commands This section describes the keywords and arguments for the various CONFIG commands BNCP Settings set bncp option on off Enables or disables bridging over a PPP link Typically used when the PPP peer doesn t support IPCP encapsulation Bridging Settings Bridging lets the Cayman 2E H W use MAC Ethernet hardware addresses to forward non TCP IP traffic from one network to anot...

Страница 78: ...es its IP address and otherTCP IP configuration settings from the Cayman 2E H W can use the information for a fixed period of time called the DHCP lease set dhcp option off server relay agent Enables or disables DHCP services in the Cayman 2E H W You must enable DHCP services before you can enter other DHCP settings for the Cayman 2E H W If you turn off DHCP services and save the new configuration...

Страница 79: ...d one secondary server set dns domain name domain name Specifies the default domain name for your network When an application needs to resolve a host name it appends the default domain name to the host name and asks the DNS server if it has an address for the fully qualified host name set dns primary address ip_address Specifies the IP address of the primary DNS name server set dns secondary addre...

Страница 80: ... If PPPoE is turned off you must specify settings for Ethernet A and B separately if PPPoE is turned on you can omit the A B labels Basic Settings set ip option on off Enables or disablesTCP IP services in the Cayman 2E H W You must enableTCP IP services before you can enter otherTCP IP settings for the Cayman 2E H W If you turn offTCP IP services and save the new configuration the Cayman 2E H W c...

Страница 81: ...ress represent network information The default subnet mask for most networks is 255 255 255 0 Class C subnet mask set ip ethernet A restrictions none admin disabled set ip ethernet B restrictions none admin disabled admin only Specifies whether an administrator can open aTelnet connection to the Cayman 2E H W over the designated Ethernet interface to monitor and configure the Cayman 2E H W On the ...

Страница 82: ...casting instead of broadcasting which reduces the load on hosts which do not support routing protocols RIP 2 with MD5 authentication is an extension of RIP 2 that increases security by requiring an authentication key when routes are advertised Depending on your network needs you can configure your Cayman 2E H W to support RIP 1 RIP 2 or both set ip ethernet A B rip receive off v1 v2 v1 compat v2 M...

Страница 83: ...ed as a normal RIP 2 packet IP authentication keys can be 1 16 characters long and can include spaces and special characters You must enclose the authentication key string in double quotes Default IP Gateway Settings set ip gateway option on off Specifies whether the Cayman 2E H W should send packets to a default gateway if it does not know how to reach the destination host set ip gateway interfac...

Страница 84: ...clears IP routing settings set ip ip ppp address ip_address Assigns an IP address to the virtual PPP interface If you specify an IP address other than 0 0 0 0 your Cayman 2E H W will not negotiate its IP address with the remote peer If the remote peer does not accept the IP address specified in the ip_address argument as valid the link will not come up The default value for the ip_address argument...

Страница 85: ...ted but that administrative commands are ignored The admin only argument means that router traffic is ignored but that administrative commands are accepted set ip ip ppp addr mapping on off Specifies whether you want the Cayman 2E H W to use network address translation NAT when communicating with remote routers Network address translation lets you conceal details of your network from remote router...

Страница 86: ...P table entries do not time out You can configure as many as 16 staticARP table entries for a Cayman 2E H W Use the following commands to add staticARP entries to the Cayman 2E H W static ARP table set ip static arp ip address ip_address Specifies the IP address for the static ARP entry Enter an IP address in the ip_address argument in dotted decimal format The ip_address argument cannot be 0 0 0 ...

Страница 87: ...esent the same network class A B or C or a lower class such as a class C subnet mask for class B network number to be valid set ip static routes destination network net_address interface ip address ppp Specifies the interface through which the static route is accessible set ip static routes destination network net_address gateway address gate_address If you specified the gateway is accessible thro...

Страница 88: ... WAN port before you can configure its network settings set ip wan address ip_address Assigns an IP address to the Cayman 2E H W on the wide area network The IP address you assign to an Ethernet port must be unique on your network set ip wan broadcast broadcast_address Specifies the broadcast address for theTCP IP network connected to the WAN Ethernet port IP hosts use the broadcast address to sen...

Страница 89: ...th your network administrator set ip wan addr mapping off on Specifies whether network address translation NAT is enabled for the WAN port on the Cayman 2E H W set ip wan proxy arp on off Specifies whether you want the Cayman 2E H W to respond when the it receives an address resolution protocol for devices behind it By default proxy ARP is turned off Network Address Translation NAT Default Setting...

Страница 90: ...s on the Cayman 2E H W NAT pinholes allow you to route selected types of network traffic such as FTP requests or HTTP Web connections to a specific host behind the Cayman 2E H W transparently To set up NAT pinholes you identify the type s of traffic you want to redirect by port number and you specify the internal host to which each specified type of traffic should be directed The following list id...

Страница 91: ... set pinhole internal ip internal ip Specifies the IP address of the internal host to which traffic of the specified type should be transferred set pinhole internal port internal port Specifies the port number your Cayman 2E H W should use when forwarding traffic of the specified type Under most circumstances you would use the same number for the external and internal port PPPoE Settings You can u...

Страница 92: ...H W to compress the PPP Protocol field when it transmits datagrams over the PPP link By default protocol field compression is turned off set PPP module lcp echo requests on off Specifies whether you want your Cayman 2E H W to send LCP echo requests By default LCP echoing is turned on You should turn off LCP echoing if you do not want the Cayman 2E H W to drop a PPP link to a nonresponsive peer set...

Страница 93: ...ly fast 28 800 bps or greater Conversely you should increase the restart timer value for slow links set PPP module connection type instant on always on Specifies whether a PPP connection is maintained by the Cayman 2E H W when it is unused for extended periods If you specify always on the Cayman 2E H W never shuts down the PPP link If you specify instant on the Cayman 2E H W shuts down the PPP lin...

Страница 94: ...t the port authentication names for PAP and CHAP must be identical to the peer names for your Cayman 2E H W on the remote peer If you do not configure a chap name or pap name then the authentication packets sent by the local peer will have blank name values This may cause authentication to fail for some PPP implementations set PPP module port authentication chap name chap_name Specifies the name t...

Страница 95: ... password used by the PPP peer Peer Authentication You can specify that your Cayman 2E H W will use PAP CHAP or both to authenticate a remote peer as a PPP link is being completed Perform the following steps to specify how your Cayman 2E H W should authenticate remote peers set PPP module peer authentication chap option on off Specifies whether the Cayman 2E H W will use CHAP to authenticate conne...

Страница 96: ... Settings You can set command line interface preferences to customize your environment set preference verbose on off set define verbose on off Specifies whether you want command help and prompting information displayed By default the command line interface verbose preference is turned off If you turn it on the command line interface displays help for a node when you navigate to that node set prefe...

Страница 97: ...raphical user interface Similarly you would have to configure your Telnet application to use the appropriate port when opening a configuration connection to your Cayman 2E H W set servers web http 0 32767 Specifies the port number for HTTP web communication with the Cayman 2E H W Because port numbers in the range 0 1024 are used by other protocols you should use numbers in the range 2000 32767 whe...

Страница 98: ... address of the host acting as an SNMP console The optional community community name identifies the name of the Cayman 2E H W community which is included in the trap message the device sends to the management console This name which is not used for authentication does not have to match a predefined community name set snmp sysgroup contact contact_info Identifies the system contact such as the name...

Страница 99: ... H W set system diagnostic level level Specifies the types of log messages you want the Cayman 2E H W to record All messages with a level number equal to or greater than the level you specify are recorded For example if you specify set system diagnostic level 3 the diagnostic log will retain high level informational messages level 3 warnings level 4 and failure messages level 5 Use the following v...

Страница 100: ...man 2E H W you could not enter GATOR gator Gator or GatoR with a trailing space as an acceptable password Passwords go into effect immediately You do not have to restart the Cayman 2E H W for the password to take effect Assigning an administrator or user password to a Cayman 2E H W does not affect communications through the device Traffic Shaping Settings Traffic shaping lets you control how much ...

Страница 101: ...pecifies the name of the Cayman 2E H W on your 802 11 wireless network The default value is Cayman 2Eserial_number All wireless clients must use the identifier set wireless default channel 1 14 Specifies the radio channel that your Cayman 2E H W uses for wireless network communications Enter a number in the range 1 11 for U S installations Refer to page 3 33 for information on channels authorized ...

Страница 102: ...mber for the key argument for example 0x1234567890 set wireless encryption key2 key If WEP is enabled specifies the value to be used for encryption key 2 Enter 0x and a 10 digit hexadecimal 0 9 A F number for the key argument for example 0x567890ABCD set wireless encryption key3 key If WEP is enabled specifies the value to be used for encryption key 3 Enter 0x and a 26 digit hexadecimal 0 9 A F nu...

Страница 103: ...ser s Guide Using the Command Line Interface November 2000 4 45 Open authentication any client can connect If you select Shared authentication the client must have the same exact encryption keys to pass authentication ...

Страница 104: ...Using the Command Line Interface Cayman 2E H W User s Guide 4 46 November 2000 ...

Страница 105: ...tatus Displaying the Diagnostic Log Displaying IP ARP Statistics Displaying IP Interface Statistics Displaying IP Routes Displaying DHCP Server Statistics Displaying DHCP Client Statistics Displaying Memory Statistics Displaying Ethernet Statistics Displaying PPPoE Statistics Displaying Wireless Statistics Using the Diagnose Utility ...

Страница 106: ... on the Cayman 2E H W Home Page When the Monitor window opens click the button for the type of information you want Displaying the Overview Status The Overview Status window displays the current status of your Cayman 2E H W the device s hardware and software revision levels a summary of the errors encountered and the time elapsed since the Cayman 2E H W was restarted To display the Overview Status...

Страница 107: ...he Diagnostic Log window click the Show button on the Monitor window The Diagnostic Log window does not update itself automatically If you want to view messages added since the Diagnostic Log window was opened click the Show button again If you want to view a complete updated list of diagnostic messages you must set the log file back to the top To scroll the Diagnostic Log window back to the first...

Страница 108: ...ovember 2000 Displaying IP ARP Statistics The IP ARP table displays the static and dynamic address resolution information maintained by the Cayman 2E H W To display the IPARP Statistics window click the IP ARP button on the Monitor window Figure 5 3 IP ARP Monitor ...

Страница 109: ... Displaying IP Interface Statistics The IP Interfaces monitor window displays information about the Ethernet ports on your Cayman 2E H W To display the IP Interfaces Statistics window click the IP Interfaces button on the Monitor window Figure 5 4 IP Interface Monitor Window ...

Страница 110: ...r s Guide 5 6 November 2000 Displaying IP Routes The IP Routes window displays information about the IP routes stored in your Cayman 2E H W To display the IP Routes window click the IP Routes button on the Monitor window Figure 5 5 IP Routes Monitor ...

Страница 111: ...W assign IP addresses and network configuration information to computers on your network The DHCP monitor window displays the Ethernet hardware address that corresponds to each IP address your Cayman 2E H W has assigned to a device on your network To display the DHCP Server Statistics window click the DHCP Server button on the Monitor window Figure 5 6 DHCP Server Statistics ...

Страница 112: ... 2000 Displaying DHCP Client Statistics As a DHCP client your Cayman 2E H W can accept IP address information from a DHCP server on your network To display the DHCP Client Statistics window click the DHCP Client button on the Monitor window Figure 5 7 DHCP Client Monitor ...

Страница 113: ... H W November 2000 5 9 Displaying Memory Statistics The Memory monitor window displays information about memory allocation in your Cayman 2E H W To display the Memory monitor window click the Memory button on the Monitor window Figure 5 8 Memory Monitor ...

Страница 114: ...00 Displaying Ethernet Statistics The Ethernet Statistics monitor window displays information about each Ethernet interface for your Cayman 2E H W To display the Ethernet Statistics window click the Ethernet button on the Monitor window Figure 5 9 Ethernet Statistics Monitor ...

Страница 115: ... November 2000 5 11 Displaying PPPoE Statistics The PPPoE Statistics window displays information about the PPPoE traffic on your network To display the PPPoE Statistics window click the PPPoE button on the Monitor window Figure 5 10 PPPoE Statistics Monitors ...

Страница 116: ...istics The Wireless Statistics window displays information about the wireless network traffic maintained by your Cayman 2E H W To display the Wireless Statistics window click the Wireless button on the Monitor window Figure 5 11 Wireless Statistics HomeRF Figure 5 12 Wireless Statistics Window 802 11b ...

Страница 117: ...isplays the results of each test as the utility runs If one test is dependent on another the Diagnose utility indents its entry in the Diagnose window For example the Diagnose utility indents the Check IP connect to Ethernet LAN entry since that test will not run if the Check Ethernet LAN Connect test fails Each test generates one of the following result codes PASS The test was successful FAIL The...

Страница 118: ...Monitoring Your Cayman 2E H W Cayman 2E H W User s Guide 5 14 November 2000 ...

Страница 119: ...ou can install a new operating system image in your Cayman 2E H W from the Home Page To do so the computer you are using to install the new image must be connected to the LAN interface of the Cayman 2E H W To install new operating system software in your Cayman 2E H W from the Home Page 1 Download the image from http www cayman com and copy it to a computer connected to the LAN side of your Cayman...

Страница 120: ... Cayman 2E H W configuration you can skip this step 4 Click the Install Software button on the Cayman 2E H W home page The Install New Cayman Software window Figure 6 1 opens Figure 6 1 Install New Cayman Software Window 5 Enter the name and path of the software image you want to install in the text field To locate the file on your computer click the Browse button select the file you want and clic...

Страница 121: ...98 or Windows NT on the Cayman 2E H W local area network To install new operating system software in your Cayman 2E H W from a Windows computer 1 Close any open applications running on your computer 2 Insert the Cayman 2E H W installation CD ROM 3 Run the setup exe program Double click the setup exe icon in the Explorer or choose Run from the Start menu and select the setup exe program 4 When the ...

Страница 122: ... Selection window appears enter the name or IP address of your Cayman 2E H W in the IP Address or Name text field The default IP address is 192 168 1 254 10 If you set an administrator password enter it in the Password text field Click Connect 11 When the Installer window appears select the operating system file you want to install in your Cayman 2E H W and click Install 12 When a dialog box asks ...

Страница 123: ... YourTFTP server must be on the same Ethernet network as the LAN interface of your Cayman 2E H W To install new operating system software in your Cayman 2E H W from aTFTP server 1 Download the software image from http www cayman com 2 Copy the file to the TFTP server for your location 3 Use the install command in the Cayman 2E H W command line interface to install the new software in your Cayman 2...

Страница 124: ...Updating Your System Software Cayman 2E H W User s Guide 6 6 November 2000 ...

Страница 125: ...t to change Changes or modifications not expressly approved by your authorized Cayman 2E H W reseller can void your authority to operate the equipment Components Power Size Processor Motorola MPC 850 Memory 2 or 4 MB DRAM 1 MB Flash EPROM Power External AC Adapter Input 110 120VAC 60 Hz Output 9VDC Dimensions 1 75 H x 8 0 W x 9 0 D Weight 2 10 lbs ...

Страница 126: ...t 100 mW Range Radius of 150 feet Wireless Standard Shared Wireless Access Protocol SWAP LAN Wireless Interface 802 11 Data Rate 11 5 5 2 and 1 Mbps per channel auto fall back Frequency 2 4 2 483 GHz Direct Sequence Spread Spectrum Output 13 dBm Range Radius of 460 feet for 11Mbps in open environment WAN Interface RJ 45 10Base T Ethernet port Console Interface DB 9 female port 9600 bps 8 N 1 Opera...

Страница 127: ...does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to w...

Страница 128: ...Technical Specifications Cayman 2E H W User s Guide A 4 November 2000 ...

Страница 129: ...nostic console without conferring with Cayman Technical Support You communicate with the diagnostic console by connecting a terminal or terminal emulator to the Cayman 2E H W maintenance console port and restarting into diagnostic EPROM mode To use the Cayman 2E H W diagnostic console you need a serial cable and either a terminal or terminal emulator such as a personal computer with a terminal emu...

Страница 130: ...into the maintenance console port on the Cayman 2E H W back panel 3 Connect the other end of the serial cable to the serial port on your terminal or terminal emulator or the modem port of your computer 4 Turn on the terminal or run the terminal emulator program on your computer You should use the following settings to configure your terminal emulation session Setting Set To Speed 9600 bps Parity N...

Страница 131: ...lenames and server names may all be de configured by specifying them as 0 zero You can use the help command to obtain on line information about the diagnostic console commands When you finish using the diagnostic console turn your Cayman 2E H W off and on to return it to normal operation Diagnostic Console Commands This section presents the commands you will use to enter modify or clear settings i...

Страница 132: ...ings cause the Cayman 2E H W to boot from flash if possible If the flash image is corrupt or unusable the Cayman 2E H W tries the BOOTP protocol 10 times to find IP configuration and aTFTP download server If the Cayman 2E H W server succeeds in downloading an image from aTFTP server it copies the downloaded image to flash memory Setting Explanation flash on Use the image in flash memory if possibl...

Страница 133: ...whitespace may be enclosed in double quotes Also whitespace may be quoted with a character and special characters may be entered in hex following a leading x sequence Administration Commands The following commands configure the Cayman 2E H W restart settings boot flash tftp bootp nogo If you do not enter an argument the boot command causes the Cayman 2E H W to behave as if it had been powered up w...

Страница 134: ...Compare to the clear command which clears the current and non volatile copies of the Cayman 2E H W EPROM settings erase headers clears the setting headers which is a quick way of invalidating the code flash and forcing an image download The optional yes argument suppresses the Are you sure confirmation message install yes The install command tells the Cayman 2E H W to download an image and program...

Страница 135: ... no ip address tftp will not be tried file unset must be set for tftp download bootp on will attempt configuration via bootp autoboot 10 will autoboot on powerup and will try 10 times autoprog never will never program a downloaded image into flash Cayman 2E H W serial no 800700 h w rev 1 eprom v1 3 Last install status code flash successfully programmed flash image 1 Cayman 2E H W 5 3 0 Boot Settin...

Страница 136: ...s enabled bootp on off The bootp command enables disables BOOTP downloading If BOOTP is enabled the Cayman 2E H W broadcasts a BOOTP request It will use the response as the source of its IP address the server and gateway IP addresses and the name of the file toTFTP download The EPROM recognizes the CMU and RFC 1048 vendor extensions to the basic BOOTP format and uses the netmask and gateway addres...

Страница 137: ...ecifies the IP address of the router if any between the Cayman 2E H W and its IPTFTP server in dotted decimal notation Enter ipgateway 0 to disable the IP gateway function ipnetmask netmask The ipnetmask netmask command specifies the subnet mask for your IP interface in dotted decimal format If you specify an IP gateway but do not enter a subnet mask your Cayman 2E H W uses the classA B or C netma...

Страница 138: ...Diagnostic Console Cayman 2E H W User s Guide B 10 November 2000 ...

Страница 139: ...H W conceal the topology of an Ethernet network connected to its LAN interface from routers on networks connected to its WAN interface When NAT is enabled the Cayman 2E H W proxies for computers on your network by pretending to be the originating host for network communications from non originating networks The Cayman 2E H W tracks which local hosts are communicating with which remote hosts and ro...

Страница 140: ...r routers to learn about the best routes to remote networks and to advertise the networks for which the Cayman 2E H W is the appropriate route When it receives aTCP IP packet the Cayman 2E H W looks up the network portion of the packet s destination IP address in its routing table and then forwards the packet through the network interface that will let the packet reach its destination most efficie...

Страница 141: ... Cayman 2E H W tracks the age of each entry in its bridging table and deletes entries that aren t used after 10 minutes If more than 255 entries are active at the same time the Cayman 2E H W discards the oldest entries to make room for new ones Bridging of non TCP IP protocols is disabled by default You must use the set bridge CLI commands if you want your Cayman 2E H W to function as a network br...

Страница 142: ...is not in use Dynamic allocation of IP addresses means that an IP address can be reused when it is not longer needed by the client to which it is assigned Dynamic IP address allocation is particularly useful in situations where clients connect to a network temporarily or where a site needs to share a limited pool of IP addresses among a group of clients that do not need permanent IP addresses Caym...

Страница 143: ...s to one another as needed How PPP Works PPP provides a standard method of encapsulating network protocol information over point to point links PPP also defines a Link Control Protocol LCP which provides for link configuration peer authentication and link quality monitoring Finally PPP includes several Network Control Protocols NCPs which establish how datagrams for a specific higher level protoco...

Страница 144: ...determines that the serial connection is not open the router passes a telephone number and modem configuration information to the modem which calls the modem connected to the remote peer When the two modems establish a connection the two peers begin negotiating the link configuration A port configured as both a dial in and dial out interface will open a link if it receives a packet from either dir...

Страница 145: ...ettings and proposes new settings acceptable to the second peer A Configure Nak message may also include proposed configuration settings for options that the second peer requires but that the first peer did not include in its Configure Request Configure Reject If one or more of the configuration options in a Configure Request are not recognizable or are not acceptable for negotiation the second pe...

Страница 146: ...thenticator terminates closes the PPP link The authentication method used by one peer can be different from the authentication method used by the other peer For example a peer at one end of a link may require authentication while the other end of the link may not Similarly one end of a link may use PAP to authenticate peers while the other end uses CHAP A PPP interface can support one or both auth...

Страница 147: ...d user to obtain a legal password The challenge identifier ensures that the encrypted authentication information cannot be recorded and played back later to gain access by an unauthorized user Network Configuration After a PPP link has been established and authentication has been satisfied PPP sends Network Control Protocol NCP packets to configure one or more network layer protocols such asTCP IP...

Страница 148: ...l to reach a remote network When the router receives a packet it consults its routing table to decide where to send the packet Static and Dynamic Routes Routes to other networks can be entered and maintained manually static routes or acquired from other routers interactively dynamic routes Static routes identify pathways to destination networks that are stable over time or to networks that must al...

Страница 149: ... a new router the router selects the more efficient route that is the one with the lower metric or hop count and discards the less efficient one If the router has a static route and a dynamic route with the same metric it uses the static route and discards the dynamic route If a router has one dynamic route to a remote network but learns of another with the same metric it retains the existing rout...

Страница 150: ...ters that those routes are no longer reachable for two minutes At the end of two minutes the unavailable dynamic route is removed from the routing table If the deleted dynamic route replaced a less efficient static route the static route is re activated Route flushing is especially important when a port is configured as a dial in PPP interface since the router will not be able to dial out to re es...

Страница 151: ... to a broadband network base can continue using their existing authentication billing access control and IP address management models PPPoE requires no additional knowledge on the part of the end user other than that needed for traditional dial up Internet access Multiple users can share a broadband connection without additional support or training costs making PPPoE ideal for small offices home o...

Страница 152: ...PPPoE Active Discovery Session confirmation PADS message The PADS message identifies the service under which the Access Concentrator has accepted the PPPoE session When the host receives the Confirmation packet from the Access Concentrator negotiations are concluded and they can proceed to the PPP Session stage PPP Session Stage Once the PPPoE session is operative the host and Access Concentrator ...

Страница 153: ...puter and identifies the Cayman 2E H W with which the computer should communicate The Cayman 2E H W then receives buffers and transmits data between the wireless network and the wired network The range of the wireless network and the number of users a single Cayman 2E H W can support depends on factors such as the networking environment More than one Cayman 2E H W can operate in the same area with...

Страница 154: ...How Your Cayman 2E H W Works Cayman 2E H W User s Guide C 16 November 2000 ...

Страница 155: ...e that some event has occurred See NAK access rate Transmission speed in bits per second of the circuit between the end user and the network adapter Board installed in a computer system to provide network communication capability to and from that computer system address mask See subnet mask ADSL Asymmetric Digital Subscriber Line Modems attached to twisted pair copper wiring that transmit 1 5 9 Mb...

Страница 156: ...resents one bit binary Numbering system that uses only zeros and ones bps Bits per second A measure of data transmission speed BRI Basic Rate Interface ISDN standard for provision of low speed ISDN services two B channels 64 kbps each and one D channel 16 kbps over a single wire pair bridge Device that passes packets between two network segments according to the packets destination address broadca...

Страница 157: ...connect a port on one Ethernet hub to a port on another Ethernet hub You can order an Ethernet crossover cable from network supply companies such as Black Box CSU DSU Channel Service Unit Data Service Unit Device responsible for connecting a digital circuit such as a T1 link with a terminal or data communications device CTS Clear to Send Circuit activated in hardware flow control when a modem or o...

Страница 158: ...ial out Compare dial in domain name Name identifying an organization on the Internet Domain names consists of sets of characters separated by periods dots The last set of characters identifies the type of organization GOV COM EDU or geographical location US SE domain nameserver Network computer that matches host names to IP addresses in response to Domain Name System DNS requests Domain Name Syste...

Страница 159: ... catches up on processing the data in the buffer See CTS RTS xon xoff fragmentation Process of breaking a packet into smaller units so that they can be sent over a network medium that cannot transmit the complete packet as a unit frame Logical grouping of information sent as a link layer unit Compare datagram packet FTP File Transfer Protocol Application protocol that lets one IP node transfer fil...

Страница 160: ... A digital network with circuit and packet switching for voice and data communications at data rates up to 1 544 or 2 048 Mbps over telephone networks LCP Link Control Protocol Protocol responsible for negotiating connection configuration parameters authenticating peers on the link determining whether a link is functioning properly and terminating the link Documented in RFC 1331 LQM Link Quality M...

Страница 161: ...Transmission Unit The maximum packet size in bytes that can be sent over a network interface NAK Negative acknowledgment See ACK NCP Network Control Protocol null modem Cable or connection device used to connect two computing devices directly rather than over a network packet Logical grouping of information that includes a header and data Compare frame datagram PAP Password Authentication Protocol...

Страница 162: ...routes and networks from one router to another RJ 45 Eight pin connector used for 10BaseT twisted pair Ethernet networks route Path through a network from one node to another A large internetwork can have several alternate routes from a source to a destination routing table Table stored in a router or other networking device that records available routes and distances for remote network destinatio...

Страница 163: ...work Telnet IP protocol that lets a user on one host establish and use a virtual terminal connection to a remote host twisted pair Cable consisting of two copper strands twisted around each other The twisting provides protection against electromagnetic interference UTP Unshielded twisted pair cable VJ Van Jacobson Abbreviation for a compression standard documented in RFC 1144 WAN Wide Area Network...

Страница 164: ...Glossary Cayman 2E H W User s Guide 10 November 2000 ...

Страница 165: ...bandwidth shaping 1 3 boot command B 5 bootp command B 8 bridging 4 19 C 2 broadcast address 4 23 4 30 browser configuration 1 2 C Cayman 2E H W 1 1 back panel 1 5 connecting 2 3 disconnecting 2 5 front panel 1 4 name 3 12 3 13 3 16 QuickStart 2 1 Cayman 2E H W Home window 3 9 cayminst exe program 6 4 clear command 4 5 B 6 CLI 4 1 command 4 5 arguments 4 16 command shortcuts 4 5 command truncation...

Страница 166: ...c log 4 7 4 10 4 11 5 3 diagnostic log level 4 41 disconnecting your Cayman 2E H W 2 5 DNS 4 21 domain name 3 14 4 21 domain name server 3 14 Domain Name System DNS 4 21 download command 4 6 duplex 4 3 Dynamic Host Configuration Protocol 1 2 Dynamic Host Configuration Protocol DHCP 5 7 C 3 Dynamic Host Control Protocol DHCP 4 20 E end address DHCP 3 18 4 20 environment for using 2 2 erase command ...

Страница 167: ... 3 18 4 21 LED power 1 4 WAN 1 4 Wireless 1 4 line display 4 38 Local Area Network LAN 1 2 location SNMP 4 39 4 40 log 4 11 5 3 log command 4 7 logging in 4 3 loglevel command 4 7 M MAC address 4 21 maintenance console port 1 5 management station 3 34 Manual QuickStart window 3 12 memory 4 12 memory statistics 5 9 metric 4 29 Microsoft Internet Explorer 3 8 mode 3 18 Monitor button 3 10 Monitor wi...

Страница 168: ...t log 4 10 reset ppp 4 10 Restart Cayman 2E button 3 10 restart command 4 5 4 10 restriction 4 27 restrictions 3 21 3 24 retry count B 7 revert command B 7 RIP 4 24 ROOT level 4 15 ROOT mode 4 4 routes 5 6 Routing Information Protocol RIP 4 24 S save command B 7 secondary nameserver 3 14 4 21 server address 3 18 set bncp command 4 19 set bridge commands 4 19 set dhcp commands 4 20 set dns commands...

Страница 169: ...12 stopbits 4 3 subnet allocation 4 28 subnet mask 4 23 4 30 LAN 3 18 WAN 3 14 3 21 SWIFT IP 1 2 system contact 3 35 system contact SNMP 4 39 4 40 system diagnostics 4 41 system location 3 35 system name 3 12 3 13 3 16 4 41 system password 4 42 T technical specifications A 1 Telnet 3 26 4 1 4 31 4 32 telnet command 4 13 Telnet traffic 4 39 temperature 2 2 terminal emulator 4 3 TFTP 3 26 4 31 4 32 ...

Страница 170: ...Index Cayman 2E H W User s Guide 6 November 2000 ...

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