Dirk Ziegelmeier wrote:
Try SO_BINDTODEVICE socket option
A better description for this short answer is: having 2 netifs on the same subnet was not supported until we implemented SO_BINDTODEVICE. It might now work, but there might be pitfalls we haven't thought of/haven't tested yet.
Having those 2 netifs on different subnets (like a router) should have worked always. Basically, as Fabian got it, finding the netif to send responses is the tricky part, which fails without BINDTODEVICE when 2 netifs are on the same subnet.
Simon
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