Unable to Send Radius Request Across the VPN from Dedicated Interfaces

Issue- Not able to send Radius Request across the VPN from dedicated interfaces

Binding effect of inbuilt Feature "SEND THROUGH VPN TUNNEL"

We configured the Radius Server on Site A’s SonicWall and enabled “SEND THROUGH VPN TUNNEL”:

After setting up the Radius Server on Site A and Site to Site VPN, we tried to test a User and found that the request was going through X0 interface instead of X1:V10 interface:

After running a couple of tests we were unable to redirect the traffic via X1:V10 interface as X0 interface was always taking precedence. So for testing purpose we UNCHECKED the “SEND THROUGH VPN TUNNEL” check box and traffic started redirecting through X1:V10 interface.

So the conclusion to the above discussed issue is, if you want to redirect traffic to send Radius requests via a dedicated interface of your choice then “SEND THROUGH VPN TUNNEL” must be unchecked.

Example, we have the option to redirect traffic for SYSLOGS via dedicated interface:

Similarly, we can do the same for Radius server but by unchecking the “SEND THROUGH VPN TUNNEL” check box.