Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

IP SLA (RTT delay)

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

3 REPLIES

IP SLA (RTT delay)

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 track 1   (this will be your main link)

ip route R2's IP & subnet 20 (this will be your backup link)

HTH,

Smitesh

New Member

IP SLA (RTT delay)

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?

IP SLA (RTT delay)

Hi Rojer,

Under track configuration, you can use delay before it changes the state.

HTH,

Smitesh

1099
Views
5
Helpful
3
Replies
CreatePlease login to create content