On Thursday 27 March 2014 21:36:43 Damon Wang wrote:
> Hi,
>
> I just know that ovs-dpctl config datapaths and ovs-ofctl are openvswicth's
> OpenFlow implement.
> "ovs-dpctl show" maybe compatible with "ovs-dpctl dump-flows"?
I far as I know, ovs-dpctl should be used mainly for debugging purposes. From
OVS's FAQ:
Q: I hear OVS has a couple of kinds of flows. Can you tell me about them?
A: Open vSwitch uses different kinds of flows for different purposes:
- OpenFlow flows are the most important kind of flow. OpenFlow
controllers use these flows to define a switch's policy.
OpenFlow flows support wildcards, priorities, and multiple
tables.
When in-band control is in use, Open vSwitch sets up a few
"hidden" flows, with priority higher than a controller or the
user can configure, that are not visible via OpenFlow. (See
the "Controller" section of the FAQ for more information
about hidden flows.)
- The Open vSwitch software switch implementation uses a second
kind of flow internally. These flows, called "datapath" or
"kernel" flows, do not support priorities and comprise only a
single table, which makes them suitable for caching. (Like
OpenFlow flows, datapath flows do support wildcarding, in Open
vSwitch 1.11 and later.) OpenFlow flows and datapath flows
also support different actions and number ports differently.
Datapath flows are an implementation detail that is subject to
change in future versions of Open vSwitch. Even with the
current version of Open vSwitch, hardware switch
implementations do not necessarily use this architecture.
>
> Regards,
> Damon
>
>
> 2014-03-27 21:02 GMT+08:00 Ageeleshwar Kandavelu <
>
> [email protected]>:
> > Sure that helps. Any Idea whats the difference between this one and the
> >
> > one in dpctl show.
> >
> > Thank you,
> > Ageeleshwar K
> >
> > ------------------------------
> >
> > *From:* Damon Wang [[email protected]]
> > *Sent:* Thursday, March 27, 2014 4:55 PM
> > *To:* Ageeleshwar Kandavelu
> > *Cc:* [email protected]
> > *Subject:* Re: [Openstack] [Neutron] Flaw in flow rules
> >
> > Hi,
> >
> > Use "ovs-ofctl show br-int" instead of "ovs-dpctl show" :-)
> >
> > Hope it helps
> >
> > Damon
> >
> > 2014-03-27 17:19 GMT+08:00 Ageeleshwar Kandavelu <
> >
> > [email protected]>:
> >> Hi,
> >>
> >> I am using vlan mode networking. There appears to be a flaw in my flow
> >> rules.
> >>
> >> To the best of my knowledge the in_port in the below output should have
> >> been 3(according to ovs-dpctl show). But it is 33. To my surprise
> >> however,
> >> my setup is working. Can any one explain to me how this can happen.
> >>
> >> root@mars:~# ovs-ofctl dump-flows br-int
> >>
> >> NXST_FLOW reply (xid=0x4):
> >> cookie=0x0, duration=522.826s, table=0, n_packets=263, n_bytes=39666,
> >>
> >> idle_age=429, priority=3*,in_port=33*,dl_vlan=100
> >> actions=mod_vlan_vid:2,NORMAL
> >>
> >> cookie=0x0, duration=2567.744s, table=0, n_packets=920, n_bytes=197692,
> >>
> >> idle_age=0, priority=2*,in_port=33 *actions=drop
> >>
> >> cookie=0x0, duration=2568.669s, table=0, n_packets=384, n_bytes=37365,
> >>
> >> idle_age=429, priority=1 actions=NORMAL
> >> root@mars:~# ovs-ofctl dump-flows br-eth1
> >>
> >> NXST_FLOW reply (xid=0x4):
> >> cookie=0x0, duration=525.124s, table=0, n_packets=384, n_bytes=37693,
> >>
> >> idle_age=431, priority=4,in_port=5,dl_vlan=2
> >> actions=mod_vlan_vid:100,NORMAL>>
> >> cookie=0x0, duration=2569.882s, table=0, n_packets=6, n_bytes=468,
> >>
> >> idle_age=2559, priority=2,in_port=5 actions=drop
> >>
> >> cookie=0x0, duration=2570.721s, table=0, n_packets=12748,
> >>
> >> n_bytes=978934, idle_age=1, priority=1 actions=NORMAL
> >> root@mars:~# ovs-dpctl show
> >>
> >> system@ovs-system:
> >> lookups: hit:39891511 missed:7260493 lost:0
> >> flows: 11
> >> port 0: ovs-system (internal)
> >> port 1: br-int (internal)
> >> port 2: br-eth1 (internal)
> >> port 3: int-br-eth1
> >> port 4: phy-br-eth1
> >> port 5: eth1
> >> port 6: tap4385c710-be
> >>
> >> root@mars:~#
> >>
> >> http://www.csscorp.com/common/email-disclaimer.php
> >>
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--
Dmitry Guryanov
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