[ovs-discuss] Tool to find flows that may trigger undefined behavior?

Michael Ben-Ami mbenami at digitalocean.com
Thu Jan 19 23:06:23 UTC 2017

If flow A is like "table=0,priority=100,ip,nw_src=,actions=..."
and flow B is like "table=0,priority=100,ip,nw_dst=,actions=..."

a single packet can theoretically match both flows and the behavior is
undefined, which is bad.

Does anybody know of a tool that examine your flows and let you know if you
have this problem?

Supplemental question: Is there a potential performance impact of this
situation and is it documented anywhere?

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