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One of the results of this "reconfiguration" is an overwrite of the /etc/file which points to the nameservers.In my case this meant that the Linux server was no longer using the AD server for DNS.Linux experts could probably tell me how to elegantly fix this, but I found 2 solutions myself: I now have a very cool setup on my laptop which enables to play around with Oracle Linux, My SQL, Apache, Active Directory, and all the other services that Linux and Windows Servers offer, all without disturbing anyone else on the network.the lab again, this time to uplift my Active Directory Domain Services (AD DS) from Windows Server 2008 R2 to Windows Server 2012 R2 and shift around the DHCP services to a different endpoint.🙂 Anyhow, I’ve documented a bit on the migration because it took a few wrinkles in the old noodle to figure out how to do it while remaining online, serving requests, and maintaining redundancy. Let’s list a few reasons below: I figured it would be best to start with the easy stuff: moving DHCP.Because my lease timers are set rather high (7 days), I wasn’t too worried about doing this during production.The host sees this network just as another NIC: $ ifconfig vboxnet0 vboxnet0 Link encap: Ethernet HWaddr 0A:: inet addr:192.168.245.1 Bcast:192.168.245.255 Mask:255.255.255.0 inet6 addr: fe80::8ff:fe00:0/64 Scope: Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:2425 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:643528 (628.4 Ki B) Note that the IP address the host uses is configured when you set up the host-only network above.I wanted to update the Windows and Linux guests using Software Update, but to do that I needed access to the Internet, which my host only adaptor did not provide for me.

Like this: And in the interests of full disclosure, here are my private adapter settings too: I then installed Windows Server 2016 giving it a static IP address of 192.168.245.110 and name ad.Surprisingly enough, the single forest / single domain structure that lives in my lab – – is nearly 10 years old.I consider it a mark of pride that it’s survived so long, especially being from Windows Server 2000 roots.I constructed a relay to 1.1, which is the internal (southbound) L3 address on my Meraki, to handle DHCP requests from the lab’s VLAN 10 and VLAN 20.I released the DHCP lease on a client and made sure that it acquired a new lease via the Meraki.

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