[ovs-discuss] Bridge does not specify output ; ignoring? (OVS-DPDK Ubuntu)

Ben Pfaff blp at ovn.org
Tue Dec 6 20:37:44 UTC 2016


The mirror-related errors in the log.  ovs-tcpdump creates a mirror.

On Tue, Dec 06, 2016 at 03:05:32PM -0500, Lax Clarke wrote:
> Pardon?  What's caused by ovs-tcpdump??????
> 
> On Tue, Dec 6, 2016 at 2:17 PM, Ben Pfaff <blp at ovn.org> wrote:
> 
> > Oh, it's probably caused by ovs-tcpdump, now that I think about it.
> >
> > On Tue, Dec 06, 2016 at 01:20:19PM -0500, Lax Clarke wrote:
> > > I do not think we did.
> > >
> > > Only config we did:
> > >
> > > # Subscribers DPDK-based Bridge
> > > ovs-vsctl add-br flat-br-0 -- set bridge flat-br-0 datapath_type=netdev
> > > ovs-vsctl add-port flat-br-0 dpdk0 -- set Interface dpdk0 type=dpdk
> > > ovs-vsctl add-port flat-br-0 stack-1-pts-1-subscribers-1 -- set Interface
> > > stack-1-pts-1-subscribers-1 type=dpdkvhostuser
> > >
> > > # Internet DPDK-based Bridge
> > > ovs-vsctl add-br flat-br-1 -- set bridge flat-br-1 datapath_type=netdev
> > > ovs-vsctl add-port flat-br-1 dpdk1 -- set Interface dpdk1 type=dpdk
> > > ovs-vsctl add-port flat-br-1 stack-1-pts-1-internet-1 -- set Interface
> > > stack-1-pts-1-internet-1 type=dpdkvhostuser
> > >
> > > # Bring it up (not sure if needed)
> > > ip link set dev flat-br-0 up
> > > ip link set dev flat-br-1 up
> > >
> > > # Enable multi-queue on host side, 4 queues
> > > ovs-vsctl set interface dpdk0 options:n_rxq=2
> > > ovs-vsctl set interface dpdk1 options:n_rxq=2
> > >
> > > # Give mode CPU Cores to ovs-vswitchd PMD threads
> > > ovs-vsctl set Open_vSwitch . other_config:pmd-cpu-mask=FFFF
> > >
> > >
> > > On Tue, Dec 6, 2016 at 12:37 PM, Ben Pfaff <blp at ovn.org> wrote:
> > >
> > > > On Tue, Dec 06, 2016 at 12:20:35PM -0500, Lax Clarke wrote:
> > > > > I'm having trouble with 2 OVS bridges I've configured (sitting on
> > top of
> > > > > OVS-DPDK):
> > > > >
> > > > > 2e18698f-9583-4c59-972c-72c2c32cfc7d
> > > > >     Bridge "flat-br-1"
> > > > >         Port "stack-1-pts-1-internet-1"
> > > > >             Interface "stack-1-pts-1-internet-1"
> > > > >                 type: dpdkvhostuser
> > > > >         Port "flat-br-1"
> > > > >             Interface "flat-br-1"
> > > > >                 type: internal
> > > > >         Port "dpdk1"
> > > > >             Interface "dpdk1"
> > > > >                 type: dpdk
> > > > >                 options: {n_rxq="2"}
> > > > >     Bridge "flat-br-0"
> > > > >         Port "flat-br-0"
> > > > >             Interface "flat-br-0"
> > > > >                 type: internal
> > > > >         Port "stack-1-pts-1-subscribers-1"
> > > > >             Interface "stack-1-pts-1-subscribers-1"
> > > > >                 type: dpdkvhostuser
> > > > >         Port "dpdk0"
> > > > >             Interface "dpdk0"
> > > > >                 type: dpdk
> > > > >                 options: {n_rxq="2"}
> > > > >     ovs_version: "2.6.0"
> > > > >
> > > > >
> > > > > I have these OF rules (nothing special):
> > > > > root at terago-2:/home/sandvine/svauto# ovs-ofctl dump-flows flat-br-0
> > > > > NXST_FLOW reply (xid=0x4):
> > > > >  cookie=0x0, duration=231.086s, table=0, n_packets=9853,
> > n_bytes=591180,
> > > > > idle_age=1, priority=0 actions=NORMAL
> > > > > root at terago-2:/home/sandvine/svauto# ovs-ofctl dump-flows flat-br-1
> > > > > NXST_FLOW reply (xid=0x4):
> > > > >  cookie=0x0, duration=234.638s, table=0, n_packets=9984,
> > n_bytes=599040,
> > > > > idle_age=2, priority=0 actions=NORMAL
> > > > >
> > > > > The traffic is reaching the bridges themselves (i.e., ovs-tcpdump on
> > > > > bridges shows the traffic), but not reaching the endpoints (VMs).
> > > >
> > > > OK...
> > > >
> > > > > The error I see in ovs switch log says:
> > > > > 2016-12-06T17:14:41.170Z|00092|bridge|ERR|bridge flat-br-0: mirror
> > > > > m_flat-br-0 does not specify output; ignoring
> > > > > 2016-12-06T17:14:41.170Z|00093|bridge|ERR|bridge flat-br-0: mirror
> > > > > m_flat-br-0 does not specify output; ignoring
> > > > > 2016-12-06T17:14:41.170Z|00094|bridge|ERR|bridge flat-br-0: mirror
> > > > > m_flat-br-0 does not specify output; ignoring
> > > > > 2016-12-06T17:14:41.171Z|00095|bridge|ERR|bridge flat-br-1: mirror
> > > > > m_flat-br-1 does not specify output; ignoring
> > > > > 2016-12-06T17:14:41.171Z|00096|bridge|ERR|bridge flat-br-1: mirror
> > > > > m_flat-br-1 does not specify output; ignoring
> > > > > 2016-12-06T17:14:41.171Z|00097|bridge|ERR|bridge flat-br-1: mirror
> > > > > m_flat-br-1 does not specify output; ignoring
> > > > >
> > > > > What does this mean?
> > > > > I browsed code here
> > > > > https://github.com/osrg/openvswitch/blob/master/
> > vswitchd/bridge.c#L3641
> > > > > It seems to suggest that I need either an output port or an output
> > vlan.
> > > >
> > > > How did you configure mirroring?
> > > >
> >


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