> Why shouldn't we give up in trace, as we do in the packet receive > path, if the port can't be found? "trace" is supposed to match the > packet receive path (otherwise it isn't as useful). I guess the > reason is that we don't have to, since the user specified the ofproto > name, but I think that we should anyway. >
There seems to be some contention on this point. Currently, the unit tests rely on this behavior. Specifically, you can do a trace without specifying an in_port and it will implicitly use OFPP_NONE. In previous rounds of review, I had suggested that we remove this option, and require a valid in_port to trace. Jesse suggested that this feature is important. I really don't care either way. Could you two please make a decision on the point? Ethan
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