[ovs-discuss] MAC_Binding\" table to have identical values

[Brendan Doyle]

I too am seeing many entries in the ovn-controller log like these:

> ovn/ovn-controller.log:2021-10-18T09:50:46.984Z|00164|ovsdb_idl|WARN|transaction 
> error: {"details":"Transaction causes multiple rows in \"MAC_Binding\" 
> table to have identical values 
> (lr_vcn6727324-ls_vcn6727324_external_ugw and \"253.255.80.18\") for 
> index on columns \"logical_port\" and \"ip\".  First row, with UUID 
> 614509d1-5dfc-4268-94b7-6190c1bd8c58, was inserted by this 
> transaction.  Second row, with UUID 
> 5b56044f-7e62-4e6b-b559-2bca31ad5ab0, existed in the database before 
> this transaction and was not modified by the 
> transaction.","error":"constraint violation"}

So with my limited understanding of the MAC_Binding table I'm wondering 
are these benign?
In that is it that we for what ever reason have decided that we need to 
do an ARP to discover
a MAC, then ovn-controller tries to add the discovered MAC to the 
MAC_Binding only to find
that it is already there. In which case the question is why was an ARP 
request sent when
we already had a MAC binding.

For me these are only ever seen on Distributed router Port Gateways.


On 12/10/2021 13:06, Ammad Syed wrote:
> Hi,
>
> I am using openstack with ml2/ovn. I have two gateway chassis whenever 
> I shutdown one chassis and bring it back online, I see below error in 
> ovn-controller logs.
>
> Can you please advise the way to fix it ?
>
> 2021-10-12T11:49:22.124Z|00511|binding|INFO|cr-lrp-4c882760-15b1-4cf4-b680-53e88880e928: 
> Claiming fa:16:3e:55:12:5a 101.53.244.97/24 
> <https://urldefense.com/v3/__http://101.53.244.97/24__;!!ACWV5N9M2RV99hQ!eo4L8XZbywCy0zb_p7-7LEVv9xl6g9V8JEf6oZTAO21scCtNAudRSGcK9mYnwIip1bQ$>
> 2021-10-12T11:49:22.126Z|00512|binding|INFO|Releasing lport 
> cr-lrp-4c882760-15b1-4cf4-b680-53e88880e928 from this chassis.
> 2021-10-12T11:50:32.032Z|00513|ovsdb_idl|WARN|transaction error: 
> {"details":"Transaction causes multiple rows in \"MAC_Binding\" table 
> to have identical values (lrp-4c882760-15b1-4cf4-b680-53e88880e928 and 
> \"fe80::6a4f:64ff:fef7:8c0\") for index on columns \"logical_port\" 
> and \"ip\".  First row, with UUID 
> cbc847e6-75e4-4d73-9906-4fef221cad38, was inserted by this 
> transaction.  Second row, with UUID 
> bcac2e3e-5f32-411a-afcf-3249b85700f4, existed in the database before 
> this transaction and was not modified by the 
> transaction.","error":"constraint violation"}
>
> Ammad
>
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