[Kea-users] Empty DUIDs on kea-dhcp4

[John Dickinson]

On 01/12/2022 12:02, Gary Henderson wrote:
> Hello KEA mailing list, ____
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> I am seeing the following errors in our logs for our KEA 2.0.0 server. ____
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> “<DATE> <TIME> ERROR[kea-dhcp4.packets/113.140299429395256] 
>   DHCP4_PACKET_PROCESS_STD_EXCEPTIONexceptionoccurred during packet 
> processing: Empty DUIDs are not allowed”____
> 
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> I am struggling to understand this error message for a couple of 
> reasons. ____
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>  1. All of the reading I have done has indicated that DUIDs are only
>     used in DHCPv6. We are only running DHCPv4 and you can see the above
>     message is from the kea-dhcp4 process – “kea-dhcp4.packets…” +
>     “DHCP4_PACKET_PROCESS_STD_EXCEPTION”____

See rfc4361. What OS are you running on the client? I know that support 
for DUIDs in v4 is different on different platforms and even different 
versions of the "same" system (Ubuntu Server and Desktop behave 
differently).

John

>  2. Further to this IPv6 is explicitly disallowed within our environment
>     so /even if /the DHCPv6 process was running nothing should be
>     sending anything to it. ____
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> Has anyone else seen similar behaviour previously? ____
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> It did occur to me that a bug like this may also be at play here but 
> I’ve been unable to confirm this - 
> https://gitlab.isc.org/isc-projects/kea/-/issues/2260 
> <https://gitlab.isc.org/isc-projects/kea/-/issues/2260> ____
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> Kind Regards, Gary Henderson
> 
>