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3Com 3C840 manual Click Add

Models: 3C840

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Configuring Remote DNS Servers 8-3

Multiple DNS remote server entries can be added. The server is chosen based on the requested domain name. If a match is not found, the default entry is chosen. The default entry has a domain name of '*'.

1Select the DNS Server List button from the DNS page.

2To add a new entry, click Add. The following screen appears:

3Enter the domain name for the entry, enter * for the default.

If the remote site uses PPP, the DNS remote servers can be learned dynamically.

4Choose the remote site name from the selection box. Otherwise they must be specified. Select Specify, and enter the IP addresses of servers.

5Click Add.

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3Com 3C840 manual Click Add

Contents

OfficeConnect Remote Sdsl Router User’s Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California About this Guide System Administration Configuring IP Routing Configuring Bridging Configuring Dhcp Upgrading Operational Software for the Officeconnect Remote Configuring Filters Troubleshooting Bridging and Routing Using the CLI Guide Technical Support Page Introduction About this Guide Conventions Guide Text Convention About this Guide Year Compliance3Com Year 2000 web About this Guide Introduction Overview What Is OfficeConnectRemote 840? Modem? What is an SdslWhat is ATM? What is Frame 4CHAPTER 1 Overview What is a Remote Site? 3Connection with Three Virtual Circuits VCs What is RFC 1490? What is Dhcp NAT and PAT can be configured for each remote siteSmart Mode? Quickly What Is DefaultBridge Mode? Getting Started Features Remote 840 PanelOfficeConnect Remote 5OfficeConnect Remote 840 Back Panel DIP Switch Modes Overview ConfigurationLocal Site LAN, Remote Site WAN, and Global configuration. Following shows the areas of configuration for each Ping a remote site Test the network accessibilityCheck the routing tables on configured protocols Remote Starting ManagerManager Menus Header Quick Link Area Main Area Using OfficeConnect Remote Manager Where to Find More Configuration Information 18CHAPTER 1 Overview Performing System Administration Tasks System Administration Adding a Login Deleting a LoginSelect the login name to be deleted Click Delete Defaults Administrator System screenRestoring Factory Updating UsingManager to Restore Access Controlling Snmp Access 6CHAPTER 2 System Administration Instructions Assigning SnmpTrap Managers Send an unsolicited message to a Snmp manager 8CHAPTER 2 System Administration Connection and communication to the remote site Remote Site ManagementRemote Site Divided into the following parts Managing a Remote Site ProfileAdding a Remote Site Profile Deleting a Remote Site Profile Modifying a Remote Site Profile This will access the Remote Sites General Modify Screen Configuring Network Service Information PPP / RFC 1483 / RFC Frame Relay Select Network Service to either PPP over Frame Relay or RFC ATM Modify Screen Configuring ATMCheck the Enable Remote Site box Information Configuring ATM Information Site Connections ConfiguringProtocol Parameters Monitoring Remote Overview Configuring IP Routing Access the IP Screen through Configuration Global IP IP Select Configuration Local Site LAN IP Network Advanced RIP Configuring IP RIPOn the LAN Necessary Resetting Parameters Parameters for Configuring IP forConfiguring IP Connection Network Information Complete the following entriesLocal WAN IP Address Remote WAN IP Address Sites IP On a Remote Site Routes Configuring IPSite Select Configuration Remote Sites WAN Static and Framed IP Route Using IP Address Validation Monitoring Ping host unreachable Ping timeout waiting for reply from IP AddressPing Responses IPAddress is alive Ping no route to host An example script of a successful ping is IP Testing Ping 18CHAPTER 4 Configuring IP Routing Configuring Bridging For more information on bridging, see Appendix A, Bridging To set up bridging on the OfficeConnect Remote 840, you must Adding a Bridge Select Configuration Local Site LAN BridgeBridging for Monitor Networks Network Status table Monitor Network Network Status table Profile, and then you modify the profile to enable bridgingConnections To that remote site Bridging IP Traffic 6CHAPTER 5 Configuring Bridging Encapsulated Routing for this remote site Check the Enable MAC Encapsulated Routing box to enable MACOfficeConnect Remote 840 can be configured for simultaneous Bridge Firewall Discard Routed Protocols Discard Forward Unicast Packets Only UnicastForward Broadcast/Unicast Packets All Advanced Bridging Options Default Bridge Mode From the addresses Testing BridgingMonitoring Bridging Viewing Bridge 12CHAPTER 5 Configuring Bridging Selecting Address Translation Network Address Translation Using the Officeconnect RemotePage Press the Modify button to set the address Configuring StaticData Protocol UDP button to access the static port tables PAT Port EntriesPage Port number, and the value of the inactivity timer Networks NAT/PAT Port Assignments screen. Only thoseEach entry will have the same public address Page An IP address for the workstation Configuring DhcpDhcp Overview Responds with 2CHAPTER 7 Configuring Dhcp Dhcp Server Monitoring Dhcp Dhcp Smart ModeAccess the Monitor Networks Dhcp Dhcp leases screen Dhcp Relay Dhcp 6CHAPTER 7 Configuring Dhcp DNS Overview Configuring DNS Remote DNS ServersTwo servers may be specified per domain name Click Add DNS Host Entries IPX packet based on the destination IPX network number Configuring IPX Routing Adding a Local IPX To add a Local IPX network Configuring IPX for Remote SitesInformation, such as IPX addresses and IPX routing Configure Remote Site IPX Network Information Established Configuring IPXCheck the Enable IPX checkbox Both Click Framed Routes Select the remote site to modify, and click Modify Associated remote site is active ServicesServices include file servers and printers Real-time via SAP packet exchange between routers Select Configuration Global IPX IPX Services Adding a Static IPX To add a static IPX Service to a LAN Click Framed Services Select Configuration Local Site IPX Modify screen RIP and SAP Monitoring IPX IPX Testing IPX Testing 14CHAPTER 9 Configuring IPX Routing Obtaining Updated Upgrading Operational Software for Officeconnect RemoteSoftware Remote 840 Unit InstallingOperational Software toPage Wait for the download to complete Execute the batch file with the following command dl 115 ms IPX Monitoring Officeconnect Remote 11-2CHAPTER 11 Monitoring the Officeconnect Remote Throughput Graphs Ethernet Interface 11-4CHAPTER 11 Monitoring the Officeconnect Remote Interface Status Information in the Monitor Sdsl Transceiver Status screen ATM Site Counters Remote Site Connection Sites Remote Site Status Frame Relay VC Site CountersPage Dhcp Address Translation 11-12CHAPTER 11 Monitoring the Officeconnect Remote IPX Bridge Connection to the WAN or whenever a critical event happens Events Logs 11-16CHAPTER 11 Monitoring the Officeconnect Remote Filtering Overview Configuring Filters Capabilities Filtering 2Advertisement Filters Bridge filter in this example Creating Filters OverviewCreating Filters Traffic Creating Filters Using the OfficeConnect Remote 840 Manager 12-6CHAPTER 12 Configuring Filters Filter Summary Filter Screens Filter IndexFilter Status Filter Create/Modify 3Basic IP Condition Condition Screens 5Basic IPX Condition Delete Filter/Add Condition screen Filter Delete/Modify Delete Filter /Add Condition 12-12CHAPTER 12 Configuring Filters Direction/location Go to Configuration Global FiltersFilter Using Disable the filter by unchecking the Enable Filter checkbox 12-14CHAPTER 12 Configuring Filters Bridge Connection Problems Troubleshooting Guide for more information Configuration problems are covered IP Wizard and Web Browser Problems LAN Connection Problems Specified address, configure IP Wizard and Web Browser Problems WAN Connection Problems Symptom Possible Cause Correction Action General Network Connection Problems Error test Remote network ATM cells are being Save the current configuration and reboot IP Network Connection Problems Symptom Possible Cause My video application IPX is not enabled over both the LAN and the WAN IPX Network Connection Problems Bridging is not enabled over both the LAN and the WAN Bridge Connection Problems 13-14CHAPTER 13 Troubleshooting Terrestrial and satellite links Bridging and RoutingRouting Concepts Decide 2APPENDIX a Bridging and Routing How Bridges Learn A-3 4APPENDIX a Bridging and Routing How Bridges Learn A-5 Physical Layout NetworkOrganization Structure, Network Organization, Structure, and Physical Layout A-7 8APPENDIX a Bridging and Routing IP Routing Information the router uses to make these assessments isRIP. RIP is also known as a distance vector protocol 10APPENDIX a Bridging and Routing Addressing Administrators that are new to the IP protocolIP Addressing Introduction to IP Mask Binary Subnets Hosts/Subnet Subnets of Class C networks IP Addressing Basics Remote Add ip network houston address 192.75.202.99/23 6APPENDIX B IP Addressing Table B-2IP Addresses 176 248 Figure B-1Numbered WAN Interfaces IP Addressing Basics 10APPENDIX B IP Addressing Becoming more scarce Address Translation Tutorial 2APPENDIX C Address Translation Tutorial Figure C-1 NAT Example PAT Example Port AddressTranslation PAT Static NAT Figure C-2 PAT Example 6APPENDIX C Address Translation Tutorial From Using the CLI GuideAccessing the CLI Documentation 2APPENDIX D Using the CLI Guide Configuration NON -SETUP Internet AccessInstructions for Set Network Service to PPP over Frame Relay or RFC Instructions for Internet Access Only Instructions for Internet Access Page Remote Office Planning Form from of the Installation Guide by enteringInformation from your remote site network administrator Telecommuting Enter the Dlci Instructions for Telecommuting / Remote Office Access E-9 Remote Site IP Otherwise, press Next Instructions for Telecommuting / Remote Office Access E-11 Then press the Save Configuration button Remote site configuration Follow these steps Configuration AuditAudit Local IPX Network These steps Saving Testing World Wide Web Site Online TechnicalSupport from Your Network Supplier Country Telephone Number Fax Number Numbers Configuring ATM information Default Bridge Mode Critical Event Log 11 Filtering Advertisement filters Networks Monitoring the OfficeConnect Remote Defined Snmp Storms a Structure WAN Page 3Com Corporation Limited Warranty Warranties Exclusive FCC Class B Statement