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Paradyne Routers manual Dynamic Host Configuration Protocol DHCP Server, IP Options Processing

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Configuring the DSL Router

IP Options Processing

The NAT and NAPT functions handle and process the IP datagrams with options set as described below. No command is available to set IP options.

The DSL Router does not process (and drops) any IP datagrams with the following IP options:

HLoose source and record route (type 131)

HStrict source and record route (type 133)

HSecurity (type 130)

HStream ID (type 136)

The DSL Router does process IP datagrams with the following IP options, but does not provide its IP address or timestamp information in the response message:

HRecord route (type 7)

HTimestamp (type 68)

Applications Supported by NAT

The DSL routers support the following applications and protocols:

HFTP

HHTTP

HNetMeeting

HPing

HRealPlayer

HTelnet

HTFTP

Dynamic Host Configuration Protocol (DHCP) Server

The DSL router provides a DHCP Server feature as specified in RFC 2131, Dynamic Host Configuration Protocol, and RFC 2132, DHCP Option and BOOTP Vendor Extensions. DHCP is the protocol used for automatic IP address assignment.

DHCP setup considerations:

HThe range of IP addresses to be used by the DHCP server must be configured. The maximum number of clients is 256.

HThe DHCP server must be enabled.

6371-A2-GB20-10

August 2000

3-7

Image 27

Paradyne Routers Dynamic Host Configuration Protocol DHCP Server, IP Options Processing, Applications Supported by NAT

Contents

August HOTWIRE DSL ROUTERSUSERS GUIDE Document No. 6371-A2-GB20-10Document Feedback Warranty, Sales, Service, and Training InformationCopyright E 2000 Paradyne Corporation All rights reserved Printed in U.S.AAbout This Guide Contents1 Introduction to Hotwire DSL Routers 2 Accessing the DSL RouterConfiguring the DSL Router DSL Router Configuration ExamplesContents Contents 6 Diagnostics and TroubleshootingA Command Line Interface 5 Monitoring the DSL RouterIndex B Configuration Defaults & Command Line ShortcutsC Traps & MIBs D DSL Router Terminal EmulationDocument Purpose and Intended Audience About This GuideAppendix B Document SummaryChapter Appendix AProduct-Related Documents Document NumberDocument Title Italics Document ConventionsSyntax TranslationIntroduction to Hotwire DSL Routers What is a Hotwire DSL Router?DSL Technologies Supported Typical DSL Router System H Console Terminal Interface. Provides an interface for Hotwire DSL Router FeaturesH High-speed Internet or intranet access H IP routing withService Subscriber Accessing the DSL Router Access Control to the DSL RouterLevels of Access show console Changing Access Session LevelsLocal Console Access admin enableCUSTOMER - CONFIG# Setting Up the New Users LoginProcedure CUSTOMER#. Type configure terminal and press EnterLocal console disabled by conflict Telnet AccessDetermining the Current Access Level Determining the Available CommandsChanging the System Identity Using the List CommandH list config Exiting from the SystemThen If you are accessing the DSL routerManually Logging Out Automatically Logging OutH DSL Interface Configuring the DSL RouterOverview of DSL Router Configuration Interfaces for the DSL RouterService Domain IP Address Assignments Ethernet and DSL Interface IdentifiersH Ethernet Interface Numbered DSL Interface Unnumbered DSL InterfaceSimplified Network Topology Network Considerations H Address Resolution Protocol ARP H Proxy ARPH Dynamic Host Configuration Protocol DHCP Server H DHCP Relay Agent IP RoutingProxy ARP Address Resolution Protocol ARPNetwork Address Translation NAT Basic NATNetwork Address Port Translation NAPT Dynamic Host Configuration Protocol DHCP Server IP Options ProcessingApplications Supported by NAT Examples DHCP Relay AgentH Land Bug/Smurf Attack Prevention ± Always present SecurityIP Filtering Land Bug/Smurf Attack Prevention3-10 If Using This Network ModelFigure 3-1. 1483 Routed Network Model Standard mode Routed vs. Bridged PDUsConfiguration Examples DSL Router Configuration ExamplesBasic Configuration Example ifn address eth1 155.1.3.254 ifn address dsl1 155.1.4.254ip route create upstream eth1 Private IP Addresses Basic NAT Configuration Examplenat basic map 192.128.1.1 10.1.3.2 10.1.3.5 nat basic enable NAT Mapping Public IP AddressesPrivate IP Addresses NAPT Configuration Examplenat napt map tcp 10.1.3.4 23 nat napt enable NAPT Mapping Public IP AddressesUnnumbered DSL Interface with Proxy ARP Configuration Example ip route create upstream eth1 155.1.3.253 proxy arp eth1 enableproxy arp dsl1 enable DHCP Relay with Proxy ARP Configuration Example proxy arp dsl1 enable dhcp relay enable dhcp relay addressip route create upstream eth1 155.1.3.253 proxy arp eth1 enable Public IP Addresses for Basic NAT DHCP Server with Basic NAT Configuration Examplenat basic address 192.128.1.0 nat basic enable dhcp server enableip route create 130.26.7.0 255.255.255.0 Downstream Router Configuration ExampleDetecting Problems Monitoring the DSL RouterWhat to Monitor ± Ethernet Link up down Status of Interfacesshow interface show interface eth1 dsl1Interface Statistics show statisticsshow statistics eth1 dsl1 ip Table 5-1. Discard Reasons for the Ethernet Interface eth1 1 of Clearing StatisticsList of Discard Reasons clear statistics eth1 dsl1 ipMonitoring the DSL Router Table 5-1. Discard Reasons for the Ethernet Interface eth1 2 ofTable 5-2. Discard Reasons for the DSL Interface dsl1 1 of Discard Reasons for the DSL Interface dsl1Discard Reasons for the DSL Interface dsl1 Table 5-2. Discard Reasons for the DSL Interface dsl1 2 ofTable 5-3. Discard Reasons for IP Discard Reasons for IP Monitoring the DSL Routershow alarms Diagnostics and TroubleshootingDiagnostics and Troubleshooting Overview Alarms Inquirysyslog ip ip-addr syslog enable disableSystem Log show syslogTable 6-1. SYSLOG Messages 1 of SYSLOG Eventssyslog level level show log numberDescription SYSLOG Message DisplayTable 6-1. SYSLOG Messages 2 of LevelPing reply x.x.x.x REQUEST TIMED OUT PingPing Test Results Ping reply x.x.x.x bytes of data=nnRound Trip Time TraceRouteTraceRoute Test Results Tracing route to x.x.x.x over a max of nn hops with nnn byte packetCommand Line Interface Command Line Interface FeatureRefer to Appendix B, Configuration Defaults & Command Line Shortcuts Syntax Command RecallNavigation Document ConventionsRFC 1483 Encapsulation Command Line Interface CommandsConfiguration Control Commands configure terminal factoryExamples ifn address dsl1 135.300.41.8 ifn dsl1 primary Interface and Service Domain IP Addressifn address eth1ifn dsl1ifn ip-address mask primary ifn dsl1ifn eth1ifn primary ifn address dsl1 unnumberedExample Refer to Chapter 4, DSL Router Configuration Examples IP Routing Tabledelete eth1ifn dsl1ifn ip route create dest-ip dest-mask next-hop-ip remoteExample Refer to Chapter 4, DSL Router Configuration Examples ip route create upstream eth1ifn next-hop-ipip route delete upstream eth1ifn ip route purgeARP Table arp timeout incomplete timearp timeout complete time proxy arp eth1 dsl1 enable disablenat basic address ip-addr ip-mask nat basic enablenat napt enable nat timeout timeExample nat basic delete nat basic delete private-ipnat napt delete udp tcp port Example nat basic map 192.128.1.1A-10 nat disabledhcp server enable disable DHCP Serverdhcp server router ip-address dhcp relay enable disableDHCP Relay Agent A-11IP Packet Processing IP multicast enable disableIP processing enable disable trap disable enable name of trapA-13 Show Command Outputsshow console Displays console enabled or console disabled show system show configshow arp show arp timeoutA-14 show ip route ip-addressshow dhcp server A-15show NAT napt show trapsshow interface show statistics show alarms show syslog show log #A-16 show DHCP relayConfiguration Option Configuration Defaults Command Line ShortcutsConfiguration Default Settings Table B-1. Default Configuration SettingsFactory Default Setting 2 ofTable B-1. Default Configuration Settings Configuration Optionarp purge Command Line Input ShortcutsTable B-2. Command Line Input Shortcuts 1 of 1483encap llc vcnat disable Table B-2. Command Line Input Shortcuts 2 ofip route delete upstream eth1ifn ip route purge list config logout nat basic enableshow system Table B-2. Command Line Input Shortcuts 3 ofshow interface dsl1 eth1 show nat basic napt show statistics dsl1 eth1 ip show syslog6371-A2-GB20-10 Configuration Defaults & Command Line ShortcutsTraps & MIBs SNMP OverviewTraps Overview Severity DSL Router TrapsTable C-1. DSL Router Traps Trap EventTrap #System Group MIBs OverviewStandard MIBs MIB II RFCssssssssssss Boot bb.bb.bb 2nd Boot xx.xx.xx DSP Setting/ContentsTable C-2. System Group Objects ObjectObject Interfaces Group RFCTable C-3. Interfaces Group Objects 1 of Setting/ContentsDescription Table C-3. Interfaces Group Objects 2 ofSetting/Contents ObjectTable C-5. IP Group Objects 1 of Extension to Interfaces Table RFCIP Group RFC Table C-4. Extension to Interfaces TableSetting/Contents IP CIDR Route Group RFCTable C-5. IP Group Objects 2 of Table C-6. IP CIDR Route Group Objects 1 ofObject Transmission GroupTable C-6. IP CIDR Route Group Objects 2 of Setting/ContentsSNMP Group Ethernet-Like MIB RFCC-10 H Interface Configuration MIB pdnIfExtConfig.mib H Device Diagnostics MIB pdndiag.mibH Configuration MIB pdnConfig.mib H Interface Configuration MIB pdninet.mibSetting/Contents Device Diagnostics MIBC-12 Table C-8. Application Test Group Objects 1 ofObject C-13Table C-8. Application Test Group Objects 2 of Setting/Contentsconfigure C-14Table C-8. Application Test Group Objects 3 of Setting/ContentsSetting/Contents Health and Status MIBC-15 Table C-9. Device Status Group Objects TableSetting/Contents Configuration MIBTable C-10. Device Configuration Copy Group Objects Table C-16NAT MIB Interface Configuration MIBTable C-11. Interface Configuration Group Objects Table ARP MIBC-18 DHCP MIBSetting/Contents Table C-12. DSL Endpoint Configuration Group Objects TableDSL Endpoint MIB C-19SYSLOG MIB C-20Interface Configuration MIB Accessing the List Command Output DSL Router Terminal EmulationDSL Router Terminal Emulation Terminal Emulation Programs ProcedureProcedure IN-1 SymbolsIndex NumbersIN-2 IN-3