BGP Path Selection with 2 VPN tunnels

Question

Hi,

I can see within documentations that 2 ExpressRoute links could use BGP AS Prepending to select the primary link. I also see that 1 ExpressRoute and 1 VPN would also work with BGP by choosing Expressroute routes over VPN. What I haven't found was, what happens with 2 VPN links, how can I influence BGP to prefer routes over one link compared to the other? Your answers are appreciated.

Answer 1

@Peter BL (Admin) Thank you for reaching us on Microsoft Q&A.

I understand that you would like to know how you can influence route selection using BGP with 2 VPN link as this is not documented anywhere. You would still use AS Path Prepending for this too and the one with the lower path will be preferred. Hope this helps.

Please let us know if you have any further questions and we will be glad to assist you further. Thank you!

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