Cisco Router 800 Series Software Configuration Guide
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iii Cisco 800 Series Software Configuration Guide 78-5372-06 CONTENTS About This Guidexxvii Obtaining Documentationxxxiv World Wide Webxxxiv Documentation CD-ROMxxxiv Ordering Documentationxxxiv Obtaining Technical Assistancexxxiv Cisco Connection Onlinexxxv Technical Assistance Centerxxxv Documentation Feedbackxxxvi CHAPTER 1Concepts1-1 Overview of Cisco 800 Series and Cisco SOHO Series Routers1-2 ADSL1-4 SHDSL1-5 DNS-Based X.25 Routing1-5 Network Protocols1-6 IP1-6 G.DMT1-7 U-R21-7 Routing Protocol Options1-8 RIP1-8 EIGRP1-9 PPP Authentication Protocols1-9 PAP1-10
Contents iv Cisco 800 Series Software Configuration Guide 78-5372-06 CHAP1-10 TACACS+1-11 Network Interfaces 1-11 Ethernet1-12 ATM1-12 PVC1-12 Dialer Interface1-13 Dial Backup1-14 Backup Interface1-14 Floating Static Routes1-14 Dialer Watch1-15 NAT1-15 Easy IP (Phase 1)1-16 Easy IP (Phase 2)1-17 Cisco Easy VPN Client1-17 VoIP1-18 H.3231-18 Voice Dial Peers1-19 QoS1-20 IP Precedence1-20 PPP Fragmentation and Interleaving1-21 CBWFQ1-21 RSVP1-22 Low Latency Queuing1-22 Committed Access Rate1-23 Rate Limitation1-23 Marking of IP Precedence1-23 Weighted Fair Queuing1-24 Weighted Random Early Detection1-24
v Cisco 800 Series Software Configuration Guide 78-5372-06 Contents ATM Traffic Policing1-25 Access Lists1-25 CHAPTER 2Configuring Basic Networks2-1 Before Configuring Basic Networks2-1 Connecting a Private IP Network to the Internet2-3 Features Used2-4 Configuration2-5 Connecting a Public IP Network to the Internet2-12 Features Used2-14 Configuration2-14 Connecting a Remote Office to a Corporate Office2-22 Features Used2-23 Cisco 800 Series Router Configuration2-23 IP Routing Configuration2-29 Corporate Router Configuration2-31 IP Routing Configuration2-34 CHAPTER 3Configuring Advanced Networks3-1 Before Configuring Advanced Networks or Features3-2 Connecting a Private IP Network to the Internet and a Corporate Network3-3 Features Used3-5 Configuring the Cisco 800 Series Router3-6 Configuring the Router at the Corporate Site3-10 Connecting a Remote Network to Two Corporate Networks3-12 Features Used3-13 Configuring the Cisco 800 Series Router3-14 Configuring the Routers at the Corporate Site3-18 Configuring the ISDN Line3-19
Contents vi Cisco 800 Series Software Configuration Guide 78-5372-06 Dial-on-Demand Routing Using Snapshot Routing3-20 Configuration3-20 Verifying the DDR Configuration3-22 Configuring a Leased ISDN Line3-22 Configuring Dynamic Routing3-23 Configuring Routing Information Protocol3-23 Configuring UDP Broadcasts3-23 Configuration of UDP Broadcasts3-24 Configuring DHCP Relay3-25 Configuration of DHCP Relay3-26 Controlling the DDR ISDN Line Activation3-26 UDP Broadcasts in Windows Networks3-27 Configuration of an Extended Access List3-27 UDP Broadcasts in DHCP Relay Environment3-28 Configuration3-28 UDP Broadcasts in NTP Environment3-29 Configuration3-29 IP Traffic3-30 Configuration3-30 Restricting Access to Your Network3-31 Configuration of Extended Access List3-32 CHAPTER 4Network Scenarios4-1 Cisco 827 Router Network Connections4-2 Cisco 837 Router Network Connections4-3 Cisco 831 Router Virtual Private Network Connections4-5 Cisco 836 or Cisco SOHO 96 Network Connection4-6 Internet Access Scenarios4-8 Before You Configure Your Internet Access Network4-9
vii Cisco 800 Series Software Configuration Guide 78-5372-06 Contents Replacing a Bridge or Modem with a Cisco 827 Router4-9 Configuring the Scenario4-10 Configuration Example4-12 PPP over Ethernet with NAT4-12 Configuring the Virtual Private Dial-Up Network Group Number4-14 Configuring the ATM Interface4-15 Configuring the Dialer Interface4-15 Configuration Example4-16 PPP over Ethernet with NAT Using a Dial-on-Demand PPP-over- Ethernet Connection 4-17 Configuring the Virtual Private Dial-Up Network Group Number4-17 Configuring the ATM Interface4-17 Configuring the Dialer Interface4-18 Configuration Example4-19 PPP over ATM with NAT4-19 Configuring the Ethernet Interface4-21 Configuring the Dialer Interface4-21 Configuring the ATM Interface4-22 Configuring NAT4-23 Configuration Example4-23 Configuring Dial Backup over the Console Port4-24 Configuring Dial Backup over the ISDN Interface4-24 Dial Backup Feature Limitations and Configuration4-25 Cisco 836 and 837 Routers and Cisco SOHO 96 and 97 Routers4-25 Cisco 831 and Cisco SOHO 91 Routers4-27 Configuring Dial Backup and Remote Management for the Cisco 837 and Cisco SOHO 97 Routers 4-28 Configuring Dial Backup and Remote Management for the Cisco 836 and Cisco SOHO 96 Routers 4-29 PPP over ATM with Centrally Managed Addressing and with Dial Backup 4-31
Contents viii Cisco 800 Series Software Configuration Guide 78-5372-06 Configuring Dial Backup and Remote Management for the Cisco 837 Router 4-32 Configuration Example4-33 Configuring Dial Backup and Remote Management for the Cisco 836 Router 4-36 Configuring the Cisco 836 Router’s ISDN Settings4-37 Configuring Dial Backup and Remote Management Settings4-38 Configuring Backup Interface4-38 Configuring Floating Static Route4-38 Configuring Dialer Watch4-39 Configuration Example4-40 Configuring the Aggregator and ISDN Peer Router4-45 Configuring Remote Management for the Cisco SOHO 97 Router4-46 Configuration Example4-47 Configuring Dial Backup and Remote Management for Cisco 831 Router and Cisco SOHO 91 Router 4-48 Configuration Example for the Cisco 831 Router4-50 Configuring Remote Management for the Cisco SOHO 91 Router4-54 Configuration Example4-54 Configuring the DHCP Server4-56 Configuring the Ethernet Interface 4-57 Dynamic Addressing Received via IPCP4-58 Configuring the Central Cisco 36204-58 Configuring the Central RADIUS Server4-61 RFC 1483 Encapsulation with NAT4-62 Configuring the Ethernet Interface4-63 Configuring the ATM Interface4-64 Configuring NAT4-64 Configuration Examples4-65 Integrated Routing and Bridging4-67 Configuring the Default Gateway4-68