What is the maximum interfaces that IP SLA can support on a Cisco ISR?

[byme88]

Hi, I have a Cisco ISR 4331 and would like to know if the IP SLA feature licensing can support more than 2 WAN Internet connection? For example 3 WAN connections. Thanks!

[Flavio Miranda]

Hi

  On the IP SLA destination you can have on destination but you can have multiples SLA process .

https://community.cisco.com/t5/routing/ip-sla-for-two-public-ip-s/td-p/3183423 

[byme88]

Thanks for your input, but the link you provided only show there is 2 destinations for the tracking. What if we have one more WAN and would like to track all three?
Thanks!

[Flavio Miranda]

p sla 1
icmp-echo 62.172.38.00
timeout 1000
frequency 3
ip sla schedule 1 life forever start-time now

ip sla 2
icmp-echo 62.172.38.01
timeout 1000
frequency 3
ip sla schedule 2 life forever start-time now

ip sla 3
icmp-echo x.x.x.x
timeout 1000
frequency 3
ip sla schedule 2 life forever start-time now

track 1 ip sla 1 reachability
track 2 ip sla 2 reachability

track 3 ip sla 3 reachability

ip route 0.0.0 0.0.0.0 10.189.16.245 name ASA track 1 (Primary default route)
ip route 0.0.0 0.0.0.0 10.189.16.248 name MPLS 10 (Back up route)

ip route 0.0.0 0.0.0.0 x.x.x.x  name XXXXXXX

[byme88]

Thanks so much! I will try this out on a lab router first and post the results!

[MHM Cisco World]

No router support or not support IP SLA but IP SLA with two ISP is work prefect, 
we track one static route and increase AD of other static route.

in three ISP there is chance that router use load balance to two static route , are you sure you are want load balance between two ISP??

instead use PBR with reachability feature.

[byme88]

MHM,

The reason 3rd ISP came in play because we upgrade the primary circuits with a new ISP with better price and the circuit being replace still have a contract for another year. So instead of letting it sit around with no use, we decide to find a way to put it in use for another year.

PBR with reachability feature might be the solution.

Thanks,