I assume you mean you want to add a flow to a specific table. This feature is not available in OpenFlow 1.0. So you either need to use a higher version of OpenFlow (which POX doesn't support yet and OVS only recently has gained experimental support for), or using a Nicira extension.
There are actually two different ways. I think for both of them (and definitely for the second one), you must first enable NXT_FLOW_MOD_TABLE_ID by sending an nx_flow_mod_table_id message to a switch. Once you've done that, you can: 1) Use nx_flow_mod. This is the version of flow_mod that uses Nicira Extended Match. 2) NXT_FLOW_MOD_TABLE_ID slightly modifies how normal ofp_flow_mods are interpreted, making one byte of the command field be the table ID. There's a version of ofp_flow_mod in the nicira module called ofp_flow_mod_table_id which adds a table_id field. -- Murphy On May 30, 2013, at 10:19 AM, Mayumi Park Campos wrote: > I just have a question, if I want to add a flow per table I must use de > nicira extension? Or there is a way using the other forwarding codes? > > Thanks :) > > From: rebek_...@hotmail.com > To: murphy.mccau...@gmail.com > CC: pox-dev@lists.noxrepo.org > Subject: RE: [pox-dev] Nicira errors > Date: Thu, 30 May 2013 13:52:25 -0300 > > Thanks for the answers the problem was that I errase a line in the code by > mistake > > Its already working fine > > Sorry for the troubles and thanks again > > > Subject: Re: [pox-dev] Nicira errors > From: murphy.mccau...@gmail.com > Date: Wed, 29 May 2013 12:47:08 -0700 > CC: pox-dev@lists.noxrepo.org > To: rebek_...@hotmail.com > > Are you sure you've got the upgraded version running? Just to make sure so > we don't spend time chasing down a dead end, try running this component: > http://www.noxathome.org/x/Murphy/switch_info.py > > If that does show that you've got the new version running, capture the > control traffic using Wireshark/tcpdump or the openflow.debug component > (which makes pcap trace files) and post it here. > > -- Murphy > > On May 29, 2013, at 11:17 AM, Mayumi Park Campos wrote: > > Hi, > > I change de ovs version to de 1.9.0 but I stil get the erro message > > ./pox.py log.level --DEBUG openflow.nicira --convert-packet-in > forwarding.l2_nx > POX 0.1.0 (betta) / Copyright 2011-2013 James McCauley, et al. > INFO:forwarding.l2_nx:Simple NX switch running. > DEBUG:core:POX 0.1.0 (betta) going up... > DEBUG:core:Running on CPython (2.7.3/Aug 1 2012 05:16:07) > DEBUG:core:Platform is > Linux-3.2.0-41-generic-pae-i686-with-Ubuntu-12.04-precise > INFO:core:POX 0.1.0 (betta) is up. > DEBUG:openflow.of_01:Listening on 0.0.0.0:6633 > INFO:openflow.of_01:[00-50-04-9d-16-db 1] connected > ERROR:openflow.of_01:[00-50-04-9d-16-db 1] OpenFlow Error: > [00-50-04-9d-16-db 1] Error: header: > [00-50-04-9d-16-db 1] Error: version: 1 > [00-50-04-9d-16-db 1] Error: type: 1 (OFPT_ERROR) > [00-50-04-9d-16-db 1] Error: length: 68 > [00-50-04-9d-16-db 1] Error: xid: 10 > [00-50-04-9d-16-db 1] Error: type: OFPET_BAD_REQUEST (1) > [00-50-04-9d-16-db 1] Error: code: OFPBRC_EPERM (5) > [00-50-04-9d-16-db 1] Error: datalen: 56 > [00-50-04-9d-16-db 1] Error: 0000: 01 04 00 38 00 00 00 0a 00 00 23 20 00 00 > 00 0d ...8......# .... > [00-50-04-9d-16-db 1] Error: 0010: 00 00 00 00 00 00 00 00 fe 00 00 00 00 00 > 00 01 ................ > [00-50-04-9d-16-db 1] Error: 0020: ff ff ff ff ff ff 00 00 00 00 00 00 00 00 > 00 00 ................ > [00-50-04-9d-16-db 1] Error: 0030: 00 00 00 08 ff fb 00 00 > ........ > INFO:forwarding.l2_nx:[00-50-04-9d-16-db 1] ready > > > The thing that I want to do is to install a flow per table so I'm trying to > undestand how does this works > > Tkanks > > > From: rebek_...@hotmail.com > To: murphy.mccau...@gmail.com > CC: pox-dev@lists.noxrepo.org > Subject: RE: [pox-dev] Nicira errors > Date: Tue, 28 May 2013 16:52:47 -0300 > > Thanks Murphy, > > I'm using the ovs 1.4.6. So I think that would be the problem I'll change to > one more recent and see if the problem is fix > > Thanks so much > > > Subject: Re: [pox-dev] Nicira errors > From: murphy.mccau...@gmail.com > Date: Tue, 28 May 2013 12:42:56 -0700 > CC: pox-dev@lists.noxrepo.org > To: rebek_...@hotmail.com > > Are you using a switch that has the NXT_SET_PACKET_IN_FORMAT and > NXT_FLOW_MOD_TABLE_ID Nicira extensions? > > I'm not sure which version of Open vSwitch is the first to support these... > maybe 1.8? > > Glancing at the code, I actually don't immediately see where the new > packet-in format is actually used. You could try commenting out the lines > which try to turn it on (around 81-83 of l2_nx.py in my local copy). > > (As a sidenote, you're supposed to pass --convert-packet-in to > openflow.nicira. The docs show this, but it's not clear enough -- I'll fix > it in carp. But if you're going to try to disable this feature anyway, it > shouldn't matter.) > > -- Murphy > > On May 28, 2013, at 12:23 PM, Mayumi Park Campos wrote: > > Hi all, > > I try to run pox with this line: > > ./pox.py log.level --DEBUG openflow.nicira forwarding.l2_nx > > And get this reply on the screen: > POX 0.1.0 (betta) / Copyright 2011-2013 James McCauley, et al. > INFO:forwarding.l2_nx:Simple NX switch running. > DEBUG:core:POX 0.1.0 (betta) going up... > DEBUG:core:Running on CPython (2.7.3/Aug 1 2012 05:16:07) > DEBUG:core:Platform is > Linux-3.2.0-41-generic-pae-i686-with-Ubuntu-12.04-precise > INFO:core:POX 0.1.0 (betta) is up. > DEBUG:openflow.of_01:Listening on 0.0.0.0:6633 > INFO:openflow.of_01:[00-50-04-9d-16-db 1] connected > ERROR:openflow.of_01:[00-50-04-9d-16-db 1] OpenFlow Error: > [00-50-04-9d-16-db 1] Error: header: > [00-50-04-9d-16-db 1] Error: version: 1 > [00-50-04-9d-16-db 1] Error: type: 1 (OFPT_ERROR) > [00-50-04-9d-16-db 1] Error: length: 32 > [00-50-04-9d-16-db 1] Error: xid: 6 > [00-50-04-9d-16-db 1] Error: type: OFPET_BAD_REQUEST (1) > [00-50-04-9d-16-db 1] Error: code: OFPBRC_BAD_SUBTYPE (4) > [00-50-04-9d-16-db 1] Error: datalen: 20 > [00-50-04-9d-16-db 1] Error: 0000: 01 04 00 14 00 00 00 06 00 00 23 20 00 00 > 00 10 ..........# .... > [00-50-04-9d-16-db 1] Error: 0010: 00 00 00 01 > .... > INFO:forwarding.l2_nx:[00-50-04-9d-16-db 1] ready > > And I lose communication with the hosts > > I don't see where is the problem and don't know how to correct it. > > Thanks in advance
