Cisco Cisco 1800 2800 3800 1-Port Fast Ethernet High Speed WIC
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Figure 5. Network Topology for Primary/Backup Scenario
Branch-Office Router Configuration
This router configuration configures the router to use cellular as a backup Internet connection. The primary WAN
connection in this case is an integrated DSL connection.
!
ip dhcp pool LAN
network 192.168.18.0 255.255.255.0
default-router 192.168.18.1
dns-server 192.168.100.11
!DHCP pool to give out IP address to local hosts
!
chat-script lte "" "AT!CALL1" TIMEOUT 20 "OK"
!chat script to use to dial out for setting up cellular connection
!
track 234 ip sla 1 rechability
!Enable the object tracking
!
interface GigabitEthernet0/1/0
switchport access vlan 18
no ip address
!Switch-port to connect local client to router
!
interface ATM0/0/0
no ip address