Acked-by: Jarno Rajahalme <ja...@ovn.org> > On Jan 25, 2016, at 8:40 AM, Ben Pfaff <b...@ovn.org> wrote: > > Signed-off-by: Ben Pfaff <b...@ovn.org> > --- > FAQ.md | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/FAQ.md b/FAQ.md > index 29b2e19..15056b0 100644 > --- a/FAQ.md > +++ b/FAQ.md > @@ -1979,6 +1979,25 @@ A: When a switch sends a packet to an OpenFlow > controller using a > buffering that the OpenFlow specification requires implementations > to document. > > +### Q: How does OVS divide flows among buckets in an OpenFlow "select" group? > + > +A: In Open vSwitch 2.3 and earlier, Open vSwitch used the destination > + Ethernet address to choose a bucket in a select group. > + > + Open vSwitch 2.4 and later by default hashes the source and > + destination Ethernet address, VLAN ID, Ethernet type, IPv4/v6 > + source and destination address and protocol, and for TCP and SCTP > + only, the source and destination ports. The hash is "symmetric", > + meaning that exchanging source and destination addresses does not > + change the bucket selection. > + > + Select groups in Open vSwitch 2.4 and later can be configured to > + use a different hash function, using a Netronome extension to the > + OpenFlow 1.5+ group_mod message. For more information, see > + Documentation/group-selection-method-property.txt in the Open > + vSwitch source tree. (OpenFlow 1.5 support in Open vSwitch is still > + experimental.) > + > > Development > ----------- > -- > 2.1.3 > > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev
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