Routing information changed

[MahmoudH93]

i have a unfamiliar behavior 

i have 3 WAN links with SDWAN Zone

 its working good and it do Loadbalance 

but i notice this error 

and i lost internet for seconds  the it retrieve again 

and i  can find this error 

i posted my configuration may it help you 

thanks

 

[kumarh]

 SDWAN the health check SLA can add  routes based on the SLA status(alive/dead)
It can happen due to packet loss or if the interface flaps.
If you want to disable these events you can run following following command for disable routing update:

config system sdwan
config health-check
edit "WAN_SLA"
set update-static-route disable
next
end

[mufas12]

side effect of learning form cisco, you learn whats possible with cisco :) There is probably some open standard that does the same kind of thing, I"ll look it up later and see what I can find. good work on the subnetting, with all the "local IT" I've worked with you can never assume they did something right :)

[hbac]

Hi @MahmoudH93, 

As it is showing in the log details. You have Performance SLA configured and if the threshold is exceeded, FortiGate will remove that interface from the routing table. It means http connection to google.com, yahoo.com has more than 10% packet losses or high latency. 

Regards, 

[MahmoudH93]

also when i disable a port and static route change , i didn't lost internet 

i can't get the root cause of this problem

[khaled_omar]

hello ,

does any one got the root cause of this issue i have similar problem 

[Muhammad_Haiqal]

Hi @khaled_omar ,

Good day to you.
Please verify on the SDWAN SLA performance.
Make sure you set the ideal threshold value for the "SLA target" and "Link status".
Too low value may introduce SDWAN flapping.

You may consider this value:
Protocol : Ping

Server: 8.8.8.8 (This is reliable server to check)

SLA target:
Latency: 250ms
Threshold: 250ms
Packet loss: 10%

Link Status:
Interval : 3000ms(check every 3 seconds)

Make sure you only use this SLA to do the healthcheck.
Remove the rest, as the SLA may overlap to each other.