As I understand their fallback that is the design idea — they each hand out diverse ranges… On Sep 23, 2015, at 12:49 PM, Chris Adams <linux at cmadams.net> wrote: > Anybody have any experience with setting up dhcpd in failover mode > between two servers? I set this up on a couple of servers, and it seems > to be working, but I don't think it is working "right". It appears both > servers are replying to all requests (which for renewals works okay > because they both give the same address, but new requests get two > different responses). I thought that only one server would reply to a > particular request. > > Also, every DHCPACK is followed by a message like this in the log: > > Sep 23 15:45:50 rad2 dhcpd: bind update on x.x.x.x from mypeer rejected: incoming update is less critical than outgoing update > > Any ideas? I subscribed and asked over on the ISC-operated dhcp-users > list but haven't had any responses. Google finds others asking about > the same log message, and the only responses seem to be "well, if you > get it for every update, there's probably some configuration issue" (but > nobody ever says what issue might lead to it). > > -- > Chris Adams <linux at cmadams.net> > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos -- Jo Rhett Net Consonance : net philanthropy to improve open source and internet projects.