IP SLA for Routing

[saifuddin.miyaji]

Hi,

We have a very specific requirement with IP SLA. Based on a tracking, we need to failover to alternate routing path and stay there forever untill some user intervenes to failback to original route.

Could you please advise the tweak for such setup.

Saif 

[Mark Malone]

Hi

you would want to use ip sla with a route map with the option of verify route reachability in place so it knows the next hop is valid before failing to new circuit or back

if you don't want it automatic just use a static route with higher AD with basic ip sla tracking

see this for example of auto fail back and forth

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/861-cisco-router-pbr-ipsla-auto-redirect.html

[saifuddin.miyaji]

We already have configuration that works perfectly fine along with automatic failback. We just want it not to failback automatically. Here is the working config:

track 151 ip sla 151 reachability
ip sla 151
icmp-echo 161.228.x.y
threshold 100
timeout 2000
frequency 4
ip sla schedule 151 life forever start-time now

ip route 152.63.0.0 255.255.0.0 192.168.20.45 track 151
ip route 0.0.0.0 0.0.0.0 192.168.20.2

If I increase the AD of the primary path, how would it work to begin with? Because of the higher AD, it would never be used , i guess.

[a.alekseev]

you can make an EEM script to modify AD based on events from "track 151"