Specifications
Table Of Contents
- Contents
- Preface
- Getting Started
- Basic Router Configuration
- Interface Port Labels
- Viewing the Default Configuration
- Information Needed for Configuration
- Configuring Basic Parameters
- Configuring Static Routes
- Configuring Dynamic Routes
- Configuring Enhanced IGRP
- Basic Router Configuration
- Configuring Your Router for Ethernet and DSL Access
- Sample Network Deployments
- Configuring PPP over Ethernet with NAT
- Configuring PPP over ATM with NAT
- Configuring a LAN with DHCP and VLANs
- Configuring a VPN Using Easy VPN and an IPSec Tunnel
- Configure the IKE Policy
- Configure Group Policy Information
- Apply Mode Configuration to the Crypto Map
- Enable Policy Lookup
- Configure IPSec Transforms and Protocols
- Configure the IPSec Crypto Method and Parameters
- Apply the Crypto Map to the Physical Interface
- Create an Easy VPN Remote Configuration
- Verifying Your Easy VPN Configuration
- Configuration Example
- Configuring VPNs Using an IPSec Tunnel and Generic Routing Encapsulation
- Configuring a Simple Firewall
- Configuring a Wireless LAN Connection
- Sample Configuration
- Configuring Additional Features and Troubleshooting
- Additional Configuration Options
- Configuring Security Features
- Configuring Dial Backup and Remote Management
- Troubleshooting
- Reference Information
- Cisco IOS Software Basic Skills
- Concepts
- ROM Monitor
- Common Port Assignments

13-6
Cisco 1800 Series Integrated Services Routers (Fixed) Software Configuration Guide
OL-6426-02
Chapter 13 Configuring Dial Backup and Remote Management
Dial Backup Feature Limitations
Configuration Example
The following three examples show sample configurations for the three dial backup methods.
Example 13-1 Configuring Dial Backup Using Backup Interfaces
!
vpdn enable
!
vpdn-group 1
accept-dialin
protocol pppoe
!
!Specifies the ISDN switch type
isdn switch-type basic-net3
!
interface vlan 1
ip address 192.168.1.1 255.255.255.0
hold-queue 100 out
!
!ISDN interface to be used as a backup interface
interface BRI0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
!
interface ATM0
backup interface BRI0
no ip address
no atm ilmi-keepalive
pvc 1/40
encapsulation aal5snap
pppoe-client dial-pool-number 2
Cisco 1801, Cisco 1802, or Cisco 1803
PPP over ATM
PPP over Ethernet
Yes Backup interfaces
Floating static routes
Dialer watch
Floating static route and dialer watch need a routing protocol
to run in the router. The dialer watch method brings up the
backup interface as soon as the primary link goes down. The
backup interface is brought down as soon as the dialer
timeout is reached and the primary interface is up. The router
checks the primary interface only when the dialer timeout
expires. The backup interface remains up until the dialer
timeout is reached, even though the primary interface is up.
For the dialer watch method, a routing protocol does not need
to be running in the router, if the IP address of the peer is
known.
RFC 1483 (AAL5,
SNAP, and MUX)
Yes Backup interfaces
Floating static routes
Dialer watch
If bridging is done through the WAN interface, it is not
supported across the auxiliary port.
Table 13-1 Dial Backup Feature Support and Limitations Summary (continued)
WAN Encapsulation
Type
Dial Backup
Possible? Dial Backup Method Limitations