Dhcp Relay Agent | Paradyne 6341, 6301, 6342, 6371, 6351, 6302

3. Configuring the DSL Router

DHCP Relay Agent

The router provides the capability of serving as a DHCP Relay Agent, as specified in RFC 2131, Dynamic Host Configuration Protocol. The router provides the capability to enable and disable the DHCP Relay Agent and to configure the IP address of the DHCP server to which the DHCP requests are to be forwarded.

The DHCP server assigns an IP address to the end-user system. When DHCP Relay is enabled, it is possible to limit the number of DHCP clients. The IP Routing Table and ARP Table are automatically updated. The DHCP relay agent in the router should be used when there is a DHCP server upstream in the service domain.

DHCP relay agent setup considerations include the following:

DHCP server IP address must be configured.

DHCP relay and routing must be enabled; that is, both the server address and the interface closest to the server are configured.

The number of DHCP clients can be limited to 1–256.

DHCP server and DHCP relay functions cannot be enabled at the same time.

NAT and DHCP relay cannot be enabled at the same time.

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November 2003

6300-A2-GB20-10

Image 36

Paradyne 6341, 6301, 6342, 6371, 6351, 6302 manual Dhcp Relay Agent

Contents

Hotwire DSL Routers Copyright 2003 Paradyne Corporation All rights reserved Contents DSL Router Configuration Examples Monitoring the DSL Router Diagnostics and Troubleshooting Command Line Interface Configuration Defaults and Command Line Shortcuts Traps and MIBsDSL Router Terminal Emulation Firmware Upgrade Index Contents November About This Guide Document Purpose and Intended Audience New Features for this Release Document Summary Section Description Product-Related Documents Document Number Document Title Document Conventions Convention Translation Xii Introduction to Hotwire DSL Routers What is a Hotwire DSL Router?DSL Technologies Supported Typical DSL Router System Central Office CO Customer Premises CPOptional Hotwire DSL Router Features IP routing with Service Subscriber Management from an NMS using Snmp Accessing the DSL Router Access Control to the DSL RouterLevels of Access Local Console Access Changing Access Session LevelsConsole disable save Exit Admin enable Setting Up the New User’s Login Invalid Characters Value Ascii Hex Translation Telnet Access Password admin new password saveLocal console disabled by conflict message Telnet enable save Determining the Current Access Level Determining the Available CommandsTelnet login enable save Help Using the List Command List configChanging the System Identity List If accessing the DSL router Then Exiting from the SystemManually Logging Out Exit When autologout is Automatically Logging Out Configuring the DSL Router DSL Router Configuration OverviewDSL Router’s Interfaces Service Domain IP Address Assignments Interface Identifiers Numbered DSL or Ethernet Interface Unnumbered DSL InterfaceSimplified Network Topology IP Routing IP Options Processing Address Resolution Protocol ARP Network Considerations Proxy ARP Network Address Translation NAT Basic NATNetwork Address Port Translation NAPT/PAT Simultaneous Basic NAT and Napt Applications Supported by NAT Dynamic Host Configuration Protocol Dhcp Server Dhcp Relay Agent Security IP Protocol Type Filtering Ethernet Type Filtering Land Bug/Smurf Attack Prevention If Using This Network Model Then These DSL Cards Can Be Used Routed vs. Bridged PDUs Routed Network Model Standard mode PPPoE Client Support When the negotiated IP Address is assigned to Then Configuring the DSL Router DSL Router Configuration Examples Configuration Examples Basic Bridging Configuration Example IP, IPX Basic Routing Configuration Example Basic NAT Configuration Example NAT Mapping Public IP Addresses Private IP Addresses Commands and syntax for this example are Napt Configuration Example Napt Mapping Public IP Addresses Private IP Addresses DSL Router Configuration Examples Simultaneous Basic NAT and Napt Configuration Example DSL Router Configuration Examples Core Router 155.1.3.1 Console Port Connection Dhcp Relay with Proxy ARP Configuration Example Dhcp Server with Basic NAT Configuration Example PPPoE Client with Napt and Dhcp Server Configuration Example Downstream Router Configuration Example IP Passthrough Configuration Example Customer Premises CP DSL Router Configuration Examples November Monitoring the DSL Router Monitoring the Router LED Status Front Panel LEDsCondition Status Interface Status Performance StatisticsClearing Statistics Reasons for Discarded Data Reasons for Ethernet Interface eth1 Discarded Frames Reasons for DSL Interface dsl1 Discarded Frames Reasons for IP Processing Discarded Packets Reasons for Bridge Discarded Frames Reasons for PPPoE Discarded Frames Reasons for PPP Discarded Frames Diagnostics and Troubleshooting Diagnostics and Troubleshooting OverviewAlarms Inquiry Device Restart Syslog Commands 1 Syslog enable disableSystem Log Show syslog Syslog Commands 2 Syslog ip ip-addr mgt srvcSyslog port port-number Syslog level level Syslog Events Syslog Messages Level Description Event Ping Command PingSyslog Message Display Ping dest-ipmgt -x source-ip-l bytes -w time -ieth1 dsl1 Ping Test Results Ping reply from x.x.x.x bytes of data=nnPing reply from x.x.x.x Request Timed OUT Ping reply from x.x.x.x Destination Unreachable TraceRoute Command TraceRouteExample traceroute 135.300.41.8 -w 60 -i eth1 TraceRoute Test Results Tracing route toOver a max. of nn Hops, with nnn Byte packet X.x Command Line Interface Command Line Interface Capability Command Recall Navigating the Router’s CLISyntax Conventions CLI Commands Configuration Commands Table A-1. Configuration CommandsConfigure terminal factory Save RFC 1483 Encapsulation Command Ethernet Frame Format CommandTable A-2. RFP 1483 Encapsulation Command Table A-3. Ethernet Frame Format Command Interface and Service Domain IP Address Commands Table A-4. Interface and Service Domain IP Address CommandsExamples ifn address dsl1 135.300.41.8 Ifn dsl1 primary IP Routing Commands Table A-5. IP Routing Commands 1 Bridge Commands Table A-5. IP Routing Commands 2Table A-6. Bridge Commands 1 Bridge enable disable ARP Commands Table A-6. Bridge Commands 2Table A-7. ARP Commands 1 Proxy ARP Command Table A-7. ARP Commands 2Table A-8. Proxy ARP Command Proxy arp eth1 dsl1 enable disable NAT Commands Table A-9. NAT Commands 1 Table A-9. NAT Commands 2 Nat timeout timeNat napt purge Nat napt map udp tcp server-ip port Table A-9. NAT Commands 3 Nat basic delete private-ipNat napt delete udp tcp port Dhcp Server Commands Table A-9. NAT Commands 4Table A-10. Dhcp Server Commands 1 Table A-10. Dhcp Server Commands 2 Dhcp server router ip-addressDhcp server name domain name Dhcp server nameserver ip-addressip-address2 Dhcp Relay Agent Commands Table A-11. Dhcp Relay Agent CommandsDhcp relay enable disable Dhcp relay address ip-address IP Packet Processing Commands Table A-12. IP Packet Processing CommandsIP multicast enable disable IP routing enable disable PPPoE Client Commands Table A-13. PPPoE Client Commands 1Pppoe enable disable Ppp ip eth1 dsl1 passthrough mask no-dns Table A-13. PPPoE Client Commands 2 Ppp authentication chap pap both noneFrom previous Table A-13. PPPoE Client Commands 3 Ppp username username Telnet Commands Table A-14. Telnet Commands 1 Table A-14. Telnet Commands 2 Telnet timeout timeTelnet keep-alive enable disable Telnet keep-alive timeout time Traps Command Clearing Statistics CommandTable A-15. Traps Command Table A-16. Clearing Statistics Command Show Commands Table A-17. Show Commands 1Show alarms Show arp timeout Table A-17. Show Commands 2 Show configDisplays either console enabled or console disabled Show bridge Table A-17. Show Commands 3 Show dhcp relayShow dhcp server Table A-17. Show Commands 4 Show interface eth1 dsl1Show ip route ip-address Table A-17. Show Commands 5 Show nat basicShow nat napt Table A-17. Show Commands 6 Show pppoeShow spanning-tree Table A-17. Show Commands 7 Show statistics eth1 dsl1 ip bridge pppoe tftpShow statistics eth1 Table A-17. Show Commands 8 Show statistics dsl1Show statistics ip Show statistics bridge Table A-17. Show Commands 9 Show statistics pppoeShow statistics tftp Table A-17. Show Commands 10 Show systemShow telnet Show traps Command Line Interface November Configuration Defaults Command Line Shortcuts Configuration Default Settings A-17 Command Line Shortcuts Table B-2. Command Line Shortcuts 1Arp create ip-addr mac-addr Arp delete ip-addr Table B-2. Command Line Shortcuts 2 Table B-2. Command Line Shortcuts 3 Table B-2. Command Line Shortcuts 4 Show nat basic napt Show pppoeShow syslog Show system Show telnet Syslog ip ip-addrmgt srvc Traps and MIBs Snmp OverviewTraps Overview DSL Router Traps Variable Binding MIBs Overview Standard MIBsMIB II RFC System Group System Interfaces Group RFC InterfacesIfEntry IfType Identifies the interface type based Supported values Extension to Interfaces Table RFC IfXEntryMbps True1 Table C-5. IP Group Objects Description Setting/Contents IP Group RFC IP Cidr Route Group RFC IpForwardIpCidrRouteEntry Transmission Group Snmp Group Paradyne Enterprise MIBs Ethernet-Like MIB RFC Device Control MIB NoOp1Active1 Inactive2 Device Diagnostics MIB Ping TestTraceRoute InProgress2 Active test Timeout IcmpErrorSystemError ApplpingTestEntry Configure TracerouteApplTracerouteResultsEntry AppTracerouteResultsEntry Health and Status MIB DevStatus1DevStatus Configuration MIB Factory1-to-active8 Interface Configuration MIB PdnInetIpAddressTableEntryPrimary Secondary Dhcp MIB DSL Endpoint MIB Accessing the List Command Output DSL Router Terminal Emulation Terminal Emulation Programs Firmware Upgrade Firmware Upgrade CommandsOverview Apply download Firmware Upgrade Procedures Download dsl1ifn eth1ifn server-ip filenameDownload ifn address eth1 155.1.3.254 Paradyne server Downloading will affect user data performance Are you sure? At the CUSTOMER-CONFIG# prompt, type apply download System is being resetNo new firmware to apply Firmware Upgrade November Symbols Index IN-2 IN-3 IN-4 IN-5 IN-6