[ovs-discuss] Static CAM table

Tom Gajewski tom.gajewski at paperspace.com
Mon Oct 17 17:14:16 UTC 2016

My bad, that was obviously suppose to include the MAC in question. So
one more time, in an attempt to set a static MAC table entry:

Table entry:

13   744  so:me:ma:cc


ovs-ofctl add-flow mybridge dl_dst=so:me:ma:cc,actions=output:13

I guess what I'm asking is, what should a static flow that says "MAC
so:me:ma:cc lives on port 13" look like? Again, goal is to have a
static table entry like behavior accomplished with this flow.



On Mon, Oct 17, 2016 at 9:12 AM, Ben Pfaff <blp at ovn.org> wrote:
> On Mon, Oct 17, 2016 at 02:45:06AM -0700, Tom Gajewski wrote:
>> Hi all,
>> It is my understanding that one cannot modify the cam (well I guess in
>> openvswitch land the mac table ;] ) directly. As I'm trying to set up
>> static entries. Do I need to use flows to accomplish this, is there no
>> other way to just modify this table??
>> As for flows, I did try to add some copying an outdated entry from the
>> mac table that read
>> 13   744  so:me:ma:cc
>> like this -->
>> ovs-ofctl add-flow mybridge dl_dst=,actions=output:13
>> but that just seemed to do nothing, in fact in breaks connectivity to
>> that destination completely even if that MAC is in the table. So if I
>> do have to use flows to do this could someone tell me where I'm being
>> stupid?
> There's no direct way to modify the MAC-learning table.
> I don't know a reason why the flow that you've showed us would cause
> such big problems.  The command does omit the MAC address, but that
> would only cause an error from ovs-ofctl, so I guess that the actual
> command included the MAC.
> Maybe you should show us more of your flow table.

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