[ovs-discuss] multiple mirrors on bridge

Em Iscreant emiscreant at gmail.com
Wed Sep 26 15:17:42 UTC 2012


Thank you for the response.

I actually tried that before, but I get a "ovs-vsctl: 'add' command
requires at least 4 arguments" error.  This baffles me since the "add'
and 'set' DB commands seem to take the same arguments.  How should the
command look with the fourth argument?

BTW, I've been using open-vswitch for two years now for a variety of
network security projects and I think it's a great application.

Thanks again

On Wed, Sep 26, 2012 at 10:57 AM, Ben Pfaff <blp at nicira.com> wrote:
> On Tue, Sep 25, 2012 at 03:57:11PM -0400, Em Iscreant wrote:
>> I am trying to add multiple mirrors on a bridge.  I was able to do
>> this easily on previous version of open-vswitch, but with an recent
>> open-vswitch upgrade my reliable recipe no longer works.  Now, I am
>> using the following command:
>> sudo ovs-vsctl -- set Bridge ent_switch mirrors=@m -- --id=@eth0 get
>> Port eth0 -- --id=@ni get Port ni_ent_mon_if -- --id=@m create Mirror
>> name=ni-ent select-src-port=@eth0 output-port=@ni
>> This works, but now the second command simply overwrites it in the database:
>> sudo ovs-vsctl -- set Bridge ent_switch mirrors=@m -- --id=@eth0 get
>> Port eth0 -- --id=@ntop get Port ntop_ent_mon_if -- --id=@m create
>> Mirror name=ntop-ent select-src-port=@eth0 output-port=@ntop
>> I seem to recall reading that a bridge could support up to 32 mirrors.
>>  So how do amend the second command to add, rather than replace, a
>> mirror?
> At first glance: just change "set" to "add" in the second command.

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