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Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02
Chapter 6 Configuring Backup Data Lines and Remote Management
Configuring Cellular Dial-on-Demand Routing Backup
Configuring DDR Backup Using Floating Static Route
To configure a floating static default route on the secondary interface, use the following commands,
beginning in the global configuration mode.
Note Make sure you have ip classless enabled on your router.
SUMMARY STEPS
1. configure terminal
2. ip route network-number network-mask {ip address | interface} [administrative distance] [name
name]
DETAILED STEPS
Cellular Wireless Modem as Backup with NAT and IPsec Configuration
The following example shows how to configure the 3G wireless modem as backup with NAT and IPsec
on either GSM or CDMA networks.
Note The receive and transmit speeds cannot be configured. The actual throughput depends on the cellular
network service.
Current configuration : 3433 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
Command or Action Purpose
Step 1
configure terminal
Example:
Router# configure terminal
Enters global configuration mode from the terminal.
Step 2
ip route network-number network-mask
{ip-address | interface} [administrative distance]
[name name]
Example:
Router (config)# ip route 0.0.0.0 Dialer 2 track 234
Establishes a floating static route with the
configured administrative distance through the
specified interface.
A higher administrative distance should be
configured for the route through the backup
interface, so that the backup interface is used only
when the primary interface is down.