[ovs-discuss] dump flows for cookie

Wayne Marsh wayne at heimdallnetworks.com
Thu Sep 10 17:46:54 UTC 2015


Hello all,

I could like to get a list of flows for a given cookie.

Using:

ovs-ofctl -O OpenFlow13 dump-flows NFE cookie=0x8

I get an error:

cannot set cookie

I've tried the command without a flow to match against and all flow entries
are listed.  Setting nw_src works as expected, but I won't have this
information going in.  I would like to avoid trying to keep track of what's
on the switch in a database.

Is there a technical reason why I cannot search for a flow entry for a
given cookie?  I can delete flows for a given cookie by passing the cookie
and a cookie mask of 0xffffffffffffffff.

If I have a group of flow entries that I'm going to want to delete at the
same time, I will assign them the same cookie.  However, if I want to look
up a rule given it's opaque id - cookie - I've run into nothing but
limitations where I would have to effectively manually filter a dump of all
flows in source or maintain an external database of rules on the switch.
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