enable BORDER_ROUTING

[edmont]

Build certification reference border router with BORDER_ROUTING enabled. This is required for MATN-TC-02 for TD roles.

[edmont]

See discussion in openthread/openthread#7175

[simonlingoogle]

I doubt if we need BORDER ROUTING for Thead 1.2 certification reference BR.
Seems too much complexity added.

Changing Echo mode to OT_ICMP6_ECHO_HANDLER_ALL should suffice for reference BRs?

[edmont]

I don't think OT_ICMP6_ECHO_HANDLER_ALL is the best solution for final products (actually it can't be currently configured) so my approach is to build the reference device as similar as possible as the final product. Your concern is just a matter of reference device resources?

[simonlingoogle]

I don't think OT_ICMP6_ECHO_HANDLER_ALL is the best solution for final products (actually it can't be currently configured) so my approach is to build the reference device as similar as possible as the final product. Your concern is just a matter of reference device resources?

BORDER_ROUTING adds too much logic to the reference devices? For example, BORDER_ROUTING will automatically add OMR prefix to the Network Data. BORDER_ROUTING will also automatically add external routes to Network Data for any prefixes it discovered from the Backbone link. I am concerned these behavior may interference with the normal certification process.

It's better to keep the reference device's behavior as simple as possible.

Thoughts?

[edmont]

I agree it adds extra complexity, my main point is this complexity may uncover Thread Harness issues that would occur when using regular Thread devices built with BORDER_ROUTING support as DUT. But okay, lets address those when the time comes.

Please check openthread/openthread#7288