what's the context here? what subnets are relevant here? 

I'm not sure how to determine which subnets are relevant. But we do know that the alert has been firing nonstop for a couple weeks on a particular subnet which we apparently don't care about.

For future reference/rollback, the alert was deleted in https://critique.corp.google.com/#review/186042455

If we don't know the relevant subnets, we just keep adding irrelevant subnets to blacklisted_subnet ?

ok. Is there a nice way to automatically tell which subnets affect which DUTs, or is it documented somewhere?

I forgot that we have a blacklist. In that case, please add the recent offending subnet to the blacklist and rollback my cl