On a side note, it works with OFFER. Even though the client is also sending DISCOVER as bc, the relay is replying with unicast. But i suspekt this has something to do with KEA, because with the ‘old’ dhcp (isc), our OFFER packet are sent as bc to the same clients.
Br, Thomas On 01/03/16 10:55, "[email protected] on behalf of Thomas Andersen" <[email protected] on behalf of [email protected]> wrote: >Hi Ola, > >You are correct that the broadcast flag is set in the REQUEST message from the >client side. >However, I believe that the RFC still states that the relay should respond >with unicast. >If there is a way to configure HP to do this, I’d love to do it. But I have >not been able to find such configuration parameters. :( > >Br, >Thomas > > > > >On 01/03/16 10:50, "[email protected] on behalf of Ola Thoresen" ><[email protected] on behalf of [email protected]> wrote: > >>Just to confuse you even more, we have seen the same behaviour on >>another relay-platform. >>(Unfortunately, I don't have any links to publicly available information >>about the issue). >> >>Anyway, after debugging we discovered that the packets were sent FROM >>the client with the "broadcast" flag set. >>The relay did not clear this flag, so when the reply was received by the >>relay, it was sent (correctly) as a broadcast back to the client. >>The behaviour of DHCP-clients varies a lot when it comes to how it sets >>the broadcast flag: >>https://blogs.technet.microsoft.com/teamdhcp/2009/02/12/dhcp-broadcast-flag-handling-in-windows-7/ >> >>So the solution for us was to force the relay to clear the broadcast >>flag on dhcp messages (I do not know if this is possible on your HP switch). >>That way, the replies were unicast back to the client, and everything >>started working. >> >> >>Rgds. >> >>Ola Thoresen >> >>_______________________________________________ >>Kea-users mailing list >>[email protected] >>https://lists.isc.org/mailman/listinfo/kea-users >_______________________________________________ >Kea-users mailing list >[email protected] >https://lists.isc.org/mailman/listinfo/kea-users _______________________________________________ Kea-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/kea-users
