filter bgp virtualwan

ares 201

i have an issue on virtualwan

i have vnet spoke that are 10.0.10.0/24 and another spoke 10.0.20.0/24, they can ping each other, but when i associate the route table from on prem wich advertise 10.0.0.0/16, everything stops working and thew two subnets doesn't see each other, is there a way to set a custom route to override the bgp? or a way to filter the bgp sent from onprem?

KapilAnanth-MSFT 35,086 Reputation points Microsoft Employee

2024-03-12T07:40:58.27+00:00
@ares ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

I understand that you are experiencing issues with vWAN Routing.

I am afraid your architecture is not clear.

You mentioned you are associating a Route Table and at the same time, OnPrem is advertising a BGP Route?

While you can associate a Route table to a OnPrem connection, that is considered custom routing and not BGP.

Can you please elaborate on your set up in detail.

Please let us know

What is the prefix your OnPrem is advertising (via BGP)

What is the address prefix you are defining in the Route Table? (I see it's 10.0.0.0/16 but please confirm)

Share the details of this route, what is the next Hop and Next Hop IP

What is the association and propagation of this Route Table.

You can additionally check the effective routes and see what's causing the issue

View virtual hub effective routes

Please share the screenshot of this as well

Cheers,

Kapil