question

EKTC-2179 avatar image
0 Votes"
EKTC-2179 asked msrini-MSFT answered

Azure Express Route and VPN tunnel priorities

Hello, A customer has an existing VPN tunnel to the Azure vnet, and also wants to connect Express Route circuit to the same vnet. The issue is, that for some time, VPN connection must be preferred over the Express Route connectivity, until customer decides to roll over to new circuit.
Can you please tell, is it possible to maintain the VPN tunnel priority without advertising the more specific routes through the tunnel? E.g., if we do as-path-prepend on the routes for ExR (and modify local preference on the local devices), will it be enough to prioritize a route through VPN tunnel on Azure side? Or, none will work and we will have to advertise more specific routes in advance to ensure traffic won't fall over.

Thank you

azure-vpn-gatewayazure-expressroute
5 |1600 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.

1 Answer

msrini-MSFT avatar image
0 Votes"
msrini-MSFT answered

@EKTC-2179,

Currently there is nothing that you can do to pick VPN over the ER other than advertising more specific route via VPN gateway.

Hope this helps.

Regards,
Karthik Srinivas

5 |1600 characters needed characters left characters exceeded

Up to 10 attachments (including images) can be used with a maximum of 3.0 MiB each and 30.0 MiB total.