My method of clearing DHCP on OSX Server, was correct I've cited it again below. (The comment that both MAC numbers were iMacs was a mistake). In my case one client was a laptop from a former employee, now an outside consultant, whose machine was running on the wrong LAN, and had not been properly checked to be on that network and the other client was a phone which had also not been confirmed and checked-in to my hardware lists. Make time to proactively volunteer to set things up right the first time, even if it is not your sole responsibility, and even if your boss wants to setup the new devices. is to always fully research, overview, and document all new hardware in your networks. This question is in regards to a server with OSX Server 5.0 over OSX 10.11 running clients on 10.10 and 10.11. The entire DHCP setup in Server.app seems buggy/laggy to me. or should I have other network and/or security concerns?Īny tips more generically about how manage DHCP in Darwin/OSX on the command line, would help as well. It temporarily clears the names out of the dhcp list by turning off dhcp (in this case by using the GUI in Server.app), then deleting or editing /var/db/dhcpd_leases, and turning back on the service, but then they appear again after a few minutes. I see 2-4 of these fairly consistently, in a network where we have around 100 of similar iMacs, which would have all been imaged in a similar way, but do not have this cached data, or whatever it is. To make things little weirder, the same clients show up in the logs of some Cisco switches, and are not always on the same floor of the building, which is strange because the MACs lookup by manufacturer to likely be iMacs. I haven't yet been able to match the MAC addresses with newer Computer Names or hostnames in the logs, etc., either, and I don't have much historical data to work with for example previous, confirmed clients on the network. I have a few client machines showing up in the network (not only in Server.app but also in various logs), which have "Computer Names" (Bonjour names in Apple-speak) which I don't recognize, but probably are old clients or more likely old names of active clients.
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