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Better mechanism to reroute when connectivity is down but links are not showing down.
Create the ip sla to ping the other side
ip sla 1 icmp-echo 10.1.0.1 source-ip 10.1.0.4 threshold 500 timeout 500 frequency 1 ip sla schedule 1 life forever start-time now track 1 ip sla 1 reachability
Create the static route
Remove the static if it already exists and then create one that “tracks” the ip sla above (#1)
no ip route 10.1.1.0 255.255.255.0 10.1.0.1 ip route 10.1.1.0 255.255.255.0 10.1.0.1 track 1 ip route 10.1.1.0 255.255.255.0 10.1.45.5 10
To monitor
show track
Notes
- The timeout setting determines how long the Cisco IOS IP SLAs function will wait (in milliseconds) for a response to its request packet.
- The Cisco IOS IP SLAs operation’s threshold setting determines the rising threshold that causes a reaction event and maintains historical data.
- Don’t forget to create the “track 1 ip sla 1 reachability”. This is the number that goes with the static route.
