On Tue, Feb 6, 2024 at 1:23 AM Sri kor via discuss <
[email protected]> wrote:
> Hi Team,
>
> I have configured mac_binding_age_threshold to 1sec and
> mac_binding_removal_limit="5000". I was expecting mac_binding table entries
> to be flushed, but it's not happening. We are currently using 23.09.1. Is
> it a known issue ?
> Please advise from below logs.
>
Hi,
in 23.09 we added a mechanism that will refresh MAC bindings that are still
in use [0]. Is it possible that there is some traffic flowing which will
keep those MAC bindings alive?
It also might be a coincidence, but deleted mac bindings might be populated
back again so the overall count is the same. I would suggest monitoring MAC
binding doesn't have any traffic flowing to see if it goes away.
Also the mac_binding_removal_limit option imposes delay for deletion. If
this limit is reached next aging can happen only after 5 seconds.
>
> thanks,
> Srini
> [root@ovnkube-db-0 log]# ovn-nbctl --version
> ovn-nbctl 23.09.1
> Open vSwitch Library 3.2.2
> DB Schema 7.1.0
>
> [root@ovnkube-db-0 log]# ovn-nbctl --no-leader-only find NB_global
> _uuid : d01b9c57-29c5-4b86-8de5-c03a9f30825b
> connections : [6c9c0c05-af2a-43ab-9164-24588e8b0a3c]
> external_ids : {}
> hv_cfg : 12935
> hv_cfg_timestamp : 1705104326732
> ipsec : false
> name : ""
> nb_cfg : 13573
> nb_cfg_timestamp : 1707178571143
> options : {mac_binding_age_threshold="1",
> mac_binding_removal_limit="5000", mac_prefix="fe:58:59",
> max_tunid="16711680", northd_internal_version="23.09.1-20.29.0-71.6",
> northd_probe_interval="5000", ovn-garp-max-timeout-sec="60",
> svc_monitor_mac="5a:7f:14:6c:47:da"}
> sb_cfg : 13573
> sb_cfg_timestamp : 1707178571869
> ssl : []
> [root@ovnkube-db-0 log]# ovn-Sbctl --no-leader-only find SB_global
> bash: ovn-Sbctl: command not found
> [root@ovnkube-db-0 log]# ovn-sbctl --no-leader-only find SB_global
> _uuid : 8bb031f1-a428-449d-9559-c4c326e91f2d
> connections : [a501a7ba-8970-4dc3-94db-0088ab951aa5]
> external_ids : {}
> ipsec : false
> nb_cfg : 13573
> options : {mac_binding_age_threshold="1",
> mac_binding_removal_limit="5000", mac_prefix="fe:58:59",
> max_tunid="16711680", northd_internal_version="23.09.1-20.29.0-71.6",
> northd_probe_interval="5000", ovn-garp-max-timeout-sec="60",
> svc_monitor_mac="5a:7f:14:6c:47:da"}
> ssl : []
> [root@ovnkube-db-0 ~]# while true; do ovn-sbctl --no-leader-only list
> MAC_Binding | grep mac | wc; sleep 10;done
> 10546 31638 442932
> 10546 31638 442932
> 10546 31638 442932
> 10546 31638 442932
> 10546 31638 442932
> 10546 31638 442932
> 10546 31638 442932
> _______________________________________________
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>
Hopefully some of this is helpful.
Best regards,
Ales
[0]
https://github.com/ovn-org/ovn/commit/e1ab41ee32aa2782db82406b8bd9cda0e1fabc3c
--
Ales Musil
Senior Software Engineer - OVN Core
Red Hat EMEA <https://www.redhat.com>
[email protected]
<https://red.ht/sig>
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