Black Box LR1530A-EU-R3, LR1530A-R3 Define an IP Default Gateway, Default Gateway Location Main

Page 41

Applications

Define an IP Default Gateway

An IP default gateway is an IP router that is resident on the local IP network that this router is connected to and is used to route IP frames for destination networks that do not exist in the routing tables. When an IP frame is received that is destined for a network that is not listed in the routing tables of the router, the router will send the IP frame to the default gateway. If the device originating the IP frame is on the same local LAN as the router, the router will then send an ICMP redirect message to the originating device. Any future IP frames for that destination network will then be sent to the default gateway instead of the router.

A default gateway may be configured if there are a large number of routes that will pass through another router to a larger network. An example of this would be a router that is used to connect to the Internet. All of the routers on the local LAN would have the Internet access router as the default gateway. The routers would route information within the internal network and any IP frames that are destined for the Internet would be routed to the default gateway.

7Default Gateway Location: Main

ÄConfiguration

ÄApplication Set up

ÄDHCP Set up

ÄDefault Gateway

The IP address of the default gateway consists of 4 octets and is represented by 4 fields separated by periods (“.”), where each field is specified by a decimal number (e.g. 199.169.1.10). Each decimal number must be less than or equal to 255, that is the maximum value of each 8-bit field.

A configured Default Gateway will override a default route learned from RIP.

Configuration: The Default Gateway may be located across the WAN connection.

35

Image 41
Contents Frame Relay/Leased Line Bridge/Router Specifications Normas Oficiales Mexicanas Electrical Safety Statement Page Page Page Contents Introduction to Filtering Appendix D Software Upgrades Page Select a Site Unpack the unitRear View of the CSU-DSU router Identify the ConnectorsMake the WAN Link Connection Connect to the ConsoleMake the LAN Connections Installation Login and Enter the Required Configuration Power Up the routerMandatory Configuration Mandatory ConfigurationLink Interface Type Setting the Link Interface TypeSet Link Interface Type Location Main Service parameters Location Main Setting the T1/E1ParametersT1/E1 Selection Location Main Framed/unframed/SF/ESFFirst channel Number number of channels As specifedSet Link Interface Type Location Main Green Identify the Status LEDsFront View of the router Typical Applications & HOW to Configure Them Managing the router Using Menus Option Name Configuration Option Name Location MainConventions Frame Relay configuration Basic Frame Relay ConfigurationLink Speed Frame Relay enable Location MainLink Speed Location Main Auto Learning the Frame Relay Configuration LMI Type Manual Configuration LMI TypeAuto-Learning Location Main IP Address / Subnet mask size Quick Start Frame RelayIP Address PPP Encapsulation Location Main Frame Relay disable Location Main Basic Leased Line ConfigurationDisabled Quick Start PPP Leased Line ConnectionsLocal IP Address Location Main Basic PPP Leased Line ConfigurationBridge Connection Should You Bridge or Route? Bridged Local Area Networks Configure as an Ethernet BridgeIP Address Applications IP Routed Local Area Networks Configure as an Ethernet IP routerIP Address Default Gateway Define an IP Default GatewayDefault Gateway Location Main Remote Site Next Hop Cost Add Define an IP Static RouteEdit Static Route Location Main Define an IP Subnet Mask IP Address / mask size IP Address & Subnet Size Location MainApplications Novell Servers in Both Locations Configure as an Ethernet IPX routerApplications IPX Routed Local Area Networks Servers on one side Novell Servers in One Location OnlyIPX Frame Types Location Main Numbered Links PPP Link Configuration OverviewUnnumbered Links Dhcp Services Location Main Configure Dynamic Host Configuration ProtocolServer IP Address Pool Location MainDNS Set-Up Location Main Local + External DNS Server ConfigurationNAT Enabled Location Main Configure Network Address Translation NATEnabled NAT ExportsTranslation type Location Main Security Level Configure PPP SecuritySecurity Level Location Main Security Database Entry Location Main Incoming PAP Password Incoming Chap SecretOutgoing PAP Password Outgoing Chap Secret 10 Sample Firewall Application Configure FirewallFTP & WWW Designated Servers Location Main Firewall WAN Remote Site Filter direction Location MainFirewall Table Entry Location Main Firewall LAN Filter Direction Location MainFirewall Location Main Applications Introduction to Filtering MAC Address FilteringPattern Filtering Not Introduction to Filtering Popular Filters NetBIOS &NetBEUI Microsoft WindowsBridge IP & Related TrafficBanyan NetBIOS over TCPIP Router Other interesting TCP PortsAppendix a Menu Trees Menu Tree From previous Page Appendix B Octet Locations on Ethernet Frames Octet Locations on Ethernet Frames ARP Ethernet Type CodesOctet Locations on Ethernet Frames Octet Locations on a Bridged XNS Frame Octet Locations on Ethernet Frames Appendix C Servicing Information Opening the caseCPU Identifying the Internal ComponentsJ11 Force Zmodem Software Load Sanity TimerTo Clear a Lost Password Figure C-3 Rear View of the Console and LAN Connectors Connecting to the Console ConnectorPinout Information WAN Interface ConnectionModule CSU/DSU ModuleT1/E1 T1/E1 ModuleUniversal WAN Module Link Pinouts Connecting cable must be a shielded cableServicing Information DCE RS232C / V.24 Link PinoutsFigure C-8 RS530 / RS422 Link Pinouts RS530 / RS422 Link PinoutsFigure C-9 V.11 / X.21 Link Pinouts 11 / X.21 Link PinoutsFigure C-10 V.11 / X.21 DB25 to DB15 Connector Cable 11 / X.21 DB25 to DB15 Connector CableFigure C 11 V.35 Null-Modem Cable Null-Modem Cable ConfigurationFigure C-12 RS232 / V.24 Null-Modem Cable RS232 / V.24 Null-Modem CableRS530 / RS422 Null-Modem Cable Signal Ground DTE Ready aServicing Information Appendix D Software Upgrades Considerations Servicing Information Page PC used for Tftp transfers Link