Hi all, I've been having some trouble understanding the priority field for the flow entries.
I have successfully set flows in my switches using the default priority and I can also install them with a different priority when installing them for the first time with install_datapath_flow by simply changing the value passed in the priority field. Now I would like to install them with a priority of, say 1000, and after a while change that priority to 500. I have been reading core.py, util.py, openflow.h, monitoring.py and pycomponent.py trying to find a way to change the value maybe using send_flow_command with the command set to openflow.OFPFC_MODIFY and changing the priority field to the new one, but it didn't work. Then I thought about passing the new priority as a parameter in the "attrs" dictionary but I could not think of a proper way to implement it. But going back to the first approach, I am starting to think the priority field cannot be modified as it appears that when used in send_flow_command, it is used to help identify the flow rather than to change the flow's priority. So it looks like an identifier rather than a parameter. So, to sum up: can priorities be changed after the flows are set? If so, any ideas on how it could be done? Any help in clarifying this issue would be much appreciated. Kind regards, Daniel
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