Path selection for specific traffic through secondary link

[ravi310859]

Hi

I want to select the secondary path instead of Primary path for specific subnet 20.0.10.0/24 for our SDWAN Fabric.

Scenario : From Site A to Site B preferred path for all the traffic is through Primary Link which is reaching on 40.1.1.0/24 which is hosted on AWS cloud. 

Requirement : For specific subnet 20.0.10.0/24 only  I want secondary link to be preferred while reaching to the 40.1.1.0/24. Kindly provide a document or configuration example to achieve the same.

I am attaching here a topology for reference.

Thanks & Regards

Ravi

[dijix1990]

I would recommend you to use Application aware routing

https://www.networkacademy.io/ccie-enterprise/sdwan/configuring-application-aware-routing-policies

[Kanan Huseynli]

Hiç

are Site A routers connected to both links ? What technology do you use on LAN side, routing protocol or VRRP/HSRP?

Technically, if you configure data policy from service to tunnel that matches 20.0.10.0/24 destination prefix and you set to local TLOC which is based on secondary link. - is the option.

Also, in OMP you may do it bu advertising 20.0.10.0/24 route with higher OMP preference.

If you provide more details about site A LAN design I can give you more detailed answer.

By the way, what is "preference" value in your topology exactly?