On Wed, Aug 01, 2018 at 10:46:07AM -0400, Miguel Angel Ajo Pelayo wrote: > Hi Ben, ICMP is used as a signal from the router to tell the sender > “next hop has a lower mtu, please send smaller packets”, we would > need at least something in OVS to slow-path the “bigger than X” packets, > at that point ova-controller could take care of constructing the ICMP packet > and sending it to the source.
Yes. > But I guess, that we still need the kernel changes to match on > those “big packets”. Maybe. If we only need to worry about ICMP, though, we can set up OVN so that it always slow-paths ICMP. > On 27 July 2018 at 23:35:58, Ben Pfaff (b...@ovn.org) wrote: > > On Thu, Jul 12, 2018 at 04:03:33PM +0200, Miguel Angel Ajo Pelayo wrote: > > Is there any way to match packet_size > X on a flow? > > > > How could we implement this? > > OVS doesn't currently have a way to do that. Adding such a feature > would require kernel changes. > > You mentioned ICMP at one point. It would be pretty easy to implement > such a feature specifically for ICMP to logical router IP addresses in > OVN, because we could just slow-path such traffic to ovn-controller > (maybe we already do?) and check the packet size there. I don't know > whether there's value in that. _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
