Hi Krzysztof, talking about OVN < 23.09:
1. For the main OF connection which is used to configure OF flows, the probing is disabled by default. Just ensure that external_ids:ovn-openflow-probe-interval is not configured. The disconnects are harmful for ha-chassis-group functioning (false-positive failover events), which lead to flows recomputing and traffic interruptions. 2. There are still two OF connections for packet-ins and feature probing, which have hardcoded enabled probing with constant interval of 5 seconds. Disconnects on them are not harmful (just waist CPU time on connection re-instantiation). For all OVN versions: the mentioned patch and settings disable probing only in OVN -> OVS direction. The reverse direction still uses default probing configured from OVS side. OVN doesn’t configure OVS OF probing yet, so you should consider it on your own. For more details see thread [1]. So, I guess the backport is possible but not very necessary (if you have another inputs, please provide). The discussion about default OVS bridge probe configuration stopped here [2], but we can continue from that point. @Ilya, what do you think about disabling OF probes by default for unix domain sockets in OVS? If you’re okay with it, I can work on it and submit a patch. 1: https://mail.openvswitch.org/pipermail/ovs-dev/2023-June/405296.html 2: https://mail.openvswitch.org/pipermail/ovs-dev/2023-September/408070.html regards, Vladislav Odintsov > On 11 Jul 2024, at 17:41, Krzysztof Tomaszewski via discuss > <ovs-discuss@openvswitch.org> wrote: > > > Hello, > > In newer release of OVN there is already disabled OpenFlow inactivity probing > (disscussion [1], commit [2]) but problem still exist in v22.03. > > IMHO problem is quite impacting as it causes many reconnections after 5s of > inactivity > even on medium scale deployments which leads to OVN system instability. > > Worth to mention is that v22.03 release is still main OVN package version in > many LTS distributions > like Ubuntu 22.04. > > Are there any plans to include those changes (disable inactivity probing for > OpenFlow) in OVN v22.03 release? > > > 1: https://mail.openvswitch.org/pipermail/ovs-dev/2023-May/404625.html > 2: > https://github.com/ovn-org/ovn/commit/c16e5da803838fa66129eb61d7930fc84d237f85 > > Regards, > > Krzysztof Tomaszewski > _______________________________________________ > discuss mailing list > disc...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
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