Cisco Router 800 Series Software Configuration Guide
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4-23 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 4 Network Scenarios Internet Access Scenarios Configuring NAT Follow the steps below to configure NAT, beginning in global configuration mode. Configuration Example In the following configuration example, you do not have to enter the commands marked “default.” These commands appear automatically in the configuration file that is generated when you use the show running-config command. interface Ethernet0 ip address 192.168.1.1...
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Chapter 4 Network Scenarios Configuring Dial Backup over the Console Port 4-24 Cisco 800 Series Software Configuration Guide 78-5372-06 encapsulation aal5mux ppp dialer dialer pool-member 1 ! bundle-enable ! interface Dialer0 ip address negotiated no ip directed-broadcast (default) ip nat outside encapsulation ppp dialer pool 1 ! ip nat inside source list 1 interface Dialer0 overload ip classless (default) ip route 0.0.0.0 0.0.0.0 Dialer 0 (default gateway) ! access-list 1 permit...
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4-25 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface NoteThe remote management described next refers to backup remote management, which function allows external control of the router via the ISDN when the ATM link goes down. Dial Backup Feature Limitations and Configuration This section discusses the limitations and configuration of the dial backup feature on the Cisco 831, 836, and 837 routers and the Cisco...
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Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface 4-26 Cisco 800 Series Software Configuration Guide 78-5372-06 Floating static routes are independent of line protocol status. This is an important consideration on Frame Relay circuits wherein line protocol may not go down if the data-link connection identifier (DLCI) is inactive. Floating static routes are also encapsulation independent. NoteWhen static routes are configured, the primary interface protocol must go...
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4-27 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface Cisco 831 and Cisco SOHO 91 Routers Support for the dial backup feature on the Cisco 831 router is limited because the Ethernet WAN interface is always up, even when ISP connectivity is down across the modem connected to the Cisco 831 router. Support for dial backup is possible only for the PPPoE environment. The only way to bring up the backup interface is...
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Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface 4-28 Cisco 800 Series Software Configuration Guide 78-5372-06 For the Cisco SOHO 91 router, only dial-in capability is supported. Ta b l e 4 - 2 shows the encapsulation types supported by the Cisco 831 router dial backup. Configuring Dial Backup and Remote Management for the Cisco 837 and Cisco SOHO 97 Routers Figure 4-8 and Ta b l e 4 - 4 show how dial backup and remote management work in a network system when the...
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4-29 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface Figure 4-8 Cisco 837 Router Dial Backup and Remote Management Configuring Dial Backup and Remote Management for the Cisco 836 and Cisco SOHO 96 Routers Figure 4-9, Figure 4-10, and Ta b l e 4 - 1 1 and Ta b l e 4 - 1 2 show how dial backup and remote management work in a network system when the primary line goes down. Two scenarios are typical applications of...
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Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface 4-30 Cisco 800 Series Software Configuration Guide 78-5372-06 Figure 4-9 Cisco 836 Router Dial Backup and Remote Management—Dial Backup Through CPE Splitter, DSLAM, and CO Splitter Callout Number Description 1Primary ADSL interface 2Dial backup and remote management via ISDN interface; serves as a failover link when primary line goes down 3Administrator remote management via ISDN interface when the primary ADSL link is...
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4-31 Cisco 800 Series Software Configuration Guide 78-5372-06 Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface Figure 4-10 Cisco 836 Router Dial Backup and Remote Management—Dial Backup Directly from Router to ISDN Switch PPP over ATM with Centrally Managed Addressing and with Dial Backup When customer premises equipment such as a Cisco 837 router is connected to an ISP, an IP address is dynamically assigned to the router, or the IP address may be assigned by its...
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Chapter 4 Network Scenarios Configuring Dial Backup over the ISDN Interface 4-32 Cisco 800 Series Software Configuration Guide 78-5372-06 Configuring Dial Backup and Remote Management for the Cisco 837 Router Follow the steps below to configure dial backup and remote management for the Cisco 837 router. Command Task Step 1ip name-server 206.13.28.12Enter your ISP DNS IP address. Step 2ip dhcp pool 1Configure CPE as a local DHCP server. Step 3vpdn enableEnable VPDN. Step 4vpdn-group 1Specify VPDN...