If the region is running 2.0 or 2.1, then the 1.7 cluster simply fails to register, and the region log shows it connecting and disconnecting, over and over and over. While not ideal, the admin will likely go look into why the cluster isn't there, and notice that it's downrev.
If the region is running 2.0 or 2.1, then the 1.7 cluster simply fails to register, and the region log shows it connecting and disconnecting, over and over and over. While not ideal, the admin will likely go look into why the cluster isn't there, and notice that it's downrev.