[ovs-discuss] visualitation of ovs-ofctl mod-port options

Alessio Giorgetti alessio.giorgetti at gmail.com
Wed Jun 1 09:14:06 UTC 2016

Dear Ben,

I discovered the issue in visualization of port options. Indeed, "show" 
command is working properly, but there is a problem in the application 
of some of the options.

As a example, after applying:

 > sudo ovs-ofctl mod-port br0 2 down -O OpenFlow13
 > sudo ovs-ofctl mod-port br0 2 no-packet-in -O OpenFlow13
 > sudo ovs-ofctl show br0 -O OpenFlow13

OFPT_FEATURES_REPLY (OF1.3) (xid=0x2): dpid:0000000000000005 
n_tables:254, n_buffers:256 capabilities: FLOW_STATS TABLE_STATS 

2(eth4): addr:a0:36:9f:0a:b4:c0
      config:     PORT_DOWN NO_PACKET_IN
      state:      LINK_DOWN
      current:    COPPER AUTO_NEG
      advertised: 10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER AUTO_NEG
      supported:  10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER AUTO_NEG
      speed: 0 Mbps now, 1000 Mbps max

where PORT_DOWN and NO_PACKET_IN options are correctly configured.

However, when I try to apply no-flood option,no error message is 
received, but the option is not applied to the port and (obviously) not 
visualized with the show command.

So I guess there is some configuration in the ovs switch for which the 
port cannot be configured as no-flood. Any idea ?

Best Regards,

Il 26/05/2016 17:12, Ben Pfaff ha scritto:
> On Thu, May 26, 2016 at 01:58:52PM +0200, Alessio Giorgetti wrote:
>> I'm using Open vSwitch 2.4.0. Trying to configure some options to the
>> specific ports using the command:
>>> ovs-ofctl mod-port switch port action
>> However, I'm not able to find any command or configuration file to check if
>> the port action has been correctly applied.
>> The man pages says:
>> "The show command displays (among other information) the configuration that
>> mod-port changes."
>> However these information is not reported by the following commands:
>>> sudo ovs-ofctl show br0 -O OpenFlow13
>>> sudo ovs-vsctl list port
>> Following my previous question on STP, I have the suspect that mod-port
>> commands are not correctly applied in the ovs. This would explain the
>> problems that I still have with utilization of STP.
> I believe that "show" should report the STP state.
> Maybe you should make a specific bug report.

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