I decided to use cisco’s EEM Scripting Engine to activate and deactivate the cellular interface to support a Primary link failure of our MPLS Link combined with an IP SLA:
ip sla auto discovery
ip sla 100
icmp-echo 1.1.1.1 source-interface GigabitEthernet0/1
threshold 1000
frequency 15
ip sla schedule 100 life forever start-time now
EEM Scripts
event manager applet Activate-3G
event track 60 state down
action 1 cli command “enable”
action 2 cli command “configure terminal”
action 3 cli command “interface cellular0/1/0”
action 4 cli command “no shutdown”
action 5 cli command “end”
action 99 syslog msg “Primary Link Down – Activating 3G interface”
event manager applet Deactivate-3G
event track 60 state up
action 1 cli command “enable”
action 2 cli command “configure terminal”
action 3 cli command “interface cellular0/1/0”
action 4 cli command “shutdown”
action 5 cli command “end”
action 99 syslog msg “Primary Link Restored – Deactivating 3G interface”
MystaJoneS 