Thanks your explanation. 2016-05-19 12:11 GMT+08:00 Ben Pfaff <b...@ovn.org>:
> That describes what the logical router datapath does. > > The main purpose of the patch port is to provide isolation. A packet > that ingresses on a logical switch might egress on several ports. A > packet that passed directly from a logical switch to a logical router > might be modified by the logical router. Then, when control returns to > the logical switch, perhaps for the packet to egress on another logical > port, there needs to be some way to restore the packet state. This is > difficult to do in OpenFlow, but output to a patch port accomplishes it > in a simple way. > > I've been thinking for some time of implementing an Open vSwitch action > that directly provides a way to save and restore a packet. Such an > action would reduce the need for patch ports in OVN. However, patch > ports have not yet become a burden in OVN, so I have higher priorities. > > On Thu, May 19, 2016 at 10:28:00AM +0800, Na Zhu wrote: > > I need learn the code, it is a easy way to implement, but i think it is > not > > the only way. > > OVN knows how to what packets should be bridge and what packets should be > > routing, for example, it can configure flows to match dmac, if it is > > router mac, set the metadata to logical router datapath identifer ID, no > > need create patch port pair. > > > > It is my stupid opinion. > > > > 2016-05-18 23:05 GMT+08:00 Ben Pfaff <b...@ovn.org>: > > > > > On Wed, May 18, 2016 at 09:01:51PM +0800, Na Zhu wrote: > > > > OVN creates patch port pair for logical router interface, the routing > > > > packets go through ovs openflow pipeline many times (for routing in > one > > > HV, > > > > it is 3 times), i am confused why implement it like this, can anyone > tell > > > > me it? > > > > > > How do you suggest doing it? > > > > _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
