Hello Ian, I already tried patching these two fixes in one of the environments sometime ago and did not help.
I kind of am thinking in the similar lines that the LACP control channel of OVS has to wait till the carrier is completely capable of handling traffic before sending LACP control pdu's. The below fixes may be missing a trick for the other types of netdevs (eg. DPDK) ?? -Satish Inakoti -----Original Message----- From: Ian Stokes <ian.sto...@intel.com> Sent: Wednesday, April 03, 2019 1:09 PM To: Inakoti, Satish (Nokia - HU/Budapest) <satish.inak...@nokia.com>; b...@openvswitch.org Subject: Re: [ovs-discuss] Packet drop after openvswitch bond interface toggles On 4/2/2019 8:11 AM, Inakoti, Satish (Nokia - HU/Budapest) wrote: > Hi, > *Problem statement:* > If a ovs-bond is configured with LACP active-active mode (SLB-balancing) > and the one of the links go down and come back up again, we observe a > packet drop for few seconds. > *Environment:* > Openvswitch version - ovs-vsctl (Open vSwitch) 2.9.3 > DB Schema 7.15.1 > DPDK version - dpdk-17.11.4 > Physical nics: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network > Connection > Bond mode - LACP active-active, SLB balanced. > *Steps to reproduce:* > > 1. If one of the links go down (make it down from the ToR switch) - the > other takes over and traffic flows smooth as expected. > 2. When this link becomes active again, then the VM connected to this > bond interface observes packets(UDP) drop for few seconds. > > *Expected behavior:* > The traffic should flow without any drop, even after the interface comes up. > BR, Hi, this sounds similar to the issue described in https://mail.openvswitch.org/pipermail/ovs-dev/2019-March/356956.html There are 2 patches under review to help address the issue (although as you are using an 82599ES I would think patch 1 below should resolve the issue for you, the second patch is aimed at i40e devices). https://patchwork.ozlabs.org/patch/1051724/ https://patchwork.ozlabs.org/patch/1051725/ Could you check if they resolve the issue you are seeing? Regards Ian _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
