Black Box LR1530A-R3, LR1530A-EU-R3 Configure as an Ethernet Bridge, Bridged Local Area Networks

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Applications

Configure as an Ethernet Bridge

An Ethernet bridge intelligently forwards LAN traffic to remotely connected LANs across the Wide Area Network (WAN).

WAN connection

LAN #1

LAN #2

Figure 2 - 3 Bridged Local Area Networks

Ethernet bridges simply forward information based on Ethernet MAC addresses. If a LAN packet is destined for a device located on a remote LAN, the bridge will forward that packet to the remote LAN. If a LAN packet is destined for a device located on the local LAN, the bridge will ignore the packet.

Ethernet bridges also communicate to each other using what is called the Spanning Tree Protocol (STP). STP is used to prevent loops in a network which cause LAN traffic to be re-broadcast again and again causing network congestion.

The router is pre-configured to operate as an Ethernet bridge compatible with the IEEE 802.1d Spanning Tree Protocol definitions. This means that without configuration modifications, the router will bridge Ethernet traffic to its partner bridges when the Wide Area Network (WAN) connection has been established.

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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 Unpack the unit Select a SiteIdentify the Connectors Rear View of the CSU-DSU routerConnect to the Console Make the LAN ConnectionsMake the WAN Link Connection Installation Power Up the router Login and Enter the Required ConfigurationMandatory Configuration Mandatory ConfigurationSetting the Link Interface Type Set Link Interface Type Location MainLink Interface Type Setting the T1/E1Parameters Service parameters Location MainT1/E1 Selection Location Main Framed/unframed/SF/ESFAs specifed First channel Number number of channelsSet Link Interface Type Location Main Identify the Status LEDs GreenFront View of the router Typical Applications & HOW to Configure Them Managing the router Using Menus Configuration Option Name Location Main ConventionsOption Name Basic Frame Relay Configuration Frame Relay configurationFrame Relay enable Location Main Link Speed Location MainLink Speed Auto Learning the Frame Relay Configuration Manual Configuration LMI Type Auto-Learning Location MainLMI Type Quick Start Frame Relay IP AddressIP Address / Subnet mask size PPP Encapsulation Location Main Basic Leased Line Configuration Frame Relay disable Location MainDisabled Quick Start PPP Leased Line ConnectionsBasic PPP Leased Line Configuration Local IP Address Location MainBridge Connection Should You Bridge or Route? Configure as an Ethernet Bridge Bridged Local Area NetworksIP Address Applications Configure as an Ethernet IP router IP Routed Local Area NetworksIP Address Define an IP Default Gateway Default Gateway Location MainDefault Gateway Define an IP Static Route Edit Static Route Location MainRemote Site Next Hop Cost Add Define an IP Subnet Mask IP Address & Subnet Size Location Main IP Address / mask sizeApplications Configure as an Ethernet IPX router Novell Servers in Both LocationsApplications Novell Servers in One Location Only IPX Routed Local Area Networks Servers on one sideIPX Frame Types Location Main PPP Link Configuration Overview Numbered LinksUnnumbered Links Configure Dynamic Host Configuration Protocol Dhcp Services Location MainServer IP Address Pool Location MainLocal + External DNS Server Configuration DNS Set-Up Location MainConfigure Network Address Translation NAT NAT Enabled Location MainEnabled NAT ExportsTranslation type Location Main Configure PPP Security Security Level Location MainSecurity Level Incoming PAP Password Incoming Chap Secret Outgoing PAP Password Outgoing Chap SecretSecurity Database Entry Location Main Configure Firewall 10 Sample Firewall ApplicationFirewall WAN Remote Site Filter direction Location Main FTP & WWW Designated Servers Location MainFirewall LAN Filter Direction Location Main Firewall Table Entry Location MainFirewall Location Main Applications MAC Address Filtering Introduction to FilteringPattern Filtering Not Introduction to Filtering NetBIOS &NetBEUI Microsoft Windows Popular FiltersBridge IP & Related TrafficNetBIOS over TCP BanyanIP 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 Ethernet Type Codes ARPOctet Locations on Ethernet Frames Octet Locations on a Bridged XNS Frame Octet Locations on Ethernet Frames Opening the case Appendix C Servicing InformationIdentifying the Internal Components CPUJ11 Sanity Timer To Clear a Lost PasswordForce Zmodem Software Load Connecting to the Console Connector Figure C-3 Rear View of the Console and LAN ConnectorsWAN Interface Connection Pinout InformationModule CSU/DSU ModuleT1/E1 Module T1/E1Universal WAN Module Connecting cable must be a shielded cable Link PinoutsServicing Information RS232C / V.24 Link Pinouts DCERS530 / RS422 Link Pinouts Figure C-8 RS530 / RS422 Link Pinouts11 / X.21 Link Pinouts Figure C-9 V.11 / X.21 Link Pinouts11 / X.21 DB25 to DB15 Connector Cable Figure C-10 V.11 / X.21 DB25 to DB15 Connector CableNull-Modem Cable Configuration Figure C 11 V.35 Null-Modem CableRS232 / V.24 Null-Modem Cable Figure C-12 RS232 / V.24 Null-Modem CableSignal Ground DTE Ready a RS530 / RS422 Null-Modem CableServicing Information Appendix D Software Upgrades Considerations Servicing Information Page PC used for Tftp transfers Link