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.
But I guess, that we still need the kernel changes to match on those “big packets”. 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
