11-29-2011 01:07 AM - edited 03-04-2019 02:26 PM
Hi Expert,
I have two links primary and backup with different provider. Actually, i got RTT 40 ms when i ping test from HQ to branch. Some days i got RTT over 400 ms for long time (2-3 hrs) cause provider node has problem. It effect to voice application so i need to switchover to backup link. Do you have mechanism to detect RTT delay to switchover to backup link if it's over threshold? Please help to advise me.
Thanks
11-29-2011 09:25 PM
Hi Rojer,
Yes.
Configure IP SLA and track, such that ooif your RTT ges abve X level, it will make track down and apply that track to static route. Once track goes down, it will remove the static route.
eg,
R1 ------------------- R2
Config R1 as follow
ip sla 1
icmp-echo 2.2.2.2 source-interface Loopback0
threshold 200
ip sla schedule 1 life forever start-time now
track 1 rtr 1
ip route R2's IP & subnet
ip route R2's IP & subnet
HTH,
Smitesh
11-29-2011 10:03 PM
Hi Smitesh,
Thanks for reply. For configure above, if RTT above 200 the backup route will be use but If link flapping so the two routes could switchover between main and backup. How can i setup configure to prevent this concern?
11-30-2011 12:57 AM
Hi Rojer,
Under track configuration, you can use delay before it changes the state.
HTH,
Smitesh
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