[ovs-discuss] Immediate reaction to group-mod
joonk at gatech.edu
Mon Mar 17 09:08:22 UTC 2014
I am testing OVS with OpenFlow v1.3, and having a problem with group table modification. In particular, when I update the group table entry's action set, it seems that the update does not take immediate affect on flow table entries that are pointing to that group table.
Let's say there is a flow table entry whose action is "group table 10". And the group table entry with id 10 has an action as "output: 1". I generate flows that match the aforementioned flow table entry, so flows start to go out through output port 1.
Now, if I modify the group table entry's action to have "output: 2", those flows should now go out through output port 2 instead of 1 *immediately*, right after I send the group-mod OpenFlow command.
However, it seems that this is not the case. I have to stop the flow, wait until the flow table entry times out, and then re-initiate the flow. Then, the modified group table entry finally seems to take effect.
Is this a known problem, or am I doing something wrong? Any ideas or information will help.
FYI, I am using this particular snapshot in conjunction with Mininet.
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