interface $interface

 no shut

 dialer in-band

 dialer idle-timeout 120 

 dialer string $chatScriptName

 dialer-group $dialerGroupTag

 ip address negotiated

 async mode interactive

 ip nat outside

 exit



line $lineTag

 script dialer $chatScriptName

 modem InOut

 transport input all

 exit



dialer-list $dialerGroupTag protocol ip permit



access-list 197 permit icmp any $slaIP 0.0.0.0



ip local policy route-map track-primary-if



route-map track-primary-if permit 1

 match ip address 197

 set interface $primaryInterface

 exit



ip route 0.0.0.0 0.0.0.0 $primaryInterface 1 track 1





ip sla 1

 icmp-echo $slaIP source-interface $primaryInterface

 timeout 5000

 frequency 60

 threshold 5000

 exit



track 1 ip sla 1 reachability



ip sla schedule 1 life forever start-time now



ip route 0.0.0.0 0.0.0.0 Cellular$cellular_LineTag 253



ip nat inside source route-map nat2primary interface $primaryInterface overload

ip nat inside source route-map nat2backup interface $interface  overload

access-list 198 permit ip any any



route-map nat2backup permit 1

match ip address 198

match interface $interface



route-map nat2primary permit 1

match ip address 198

match interface $primaryInterface