How to transfer dns server from winserv 2008r2 to 2012r2?

Question

Domain Name System

Hello. Started the migration process from 2008r2 to 2012r2. According to Microsoft's instructions, successfully transferred AD and DHCP. According to their algorithm, I did the same with dns. However, there were problems with the latter. As in the manual, the final step was to assign the ip of the old one to the new machine. Turned off the old one. Now I try to add a client machine to the domain and I get:

Directory:
2012r2.my2.my1.my.ru
2008r2.my2.my1.my.ru
Possible reasons for this error include:
- Host (A) or (AAAA) records that map the name of an Active Directory domain controller to its IP addresses, are lost or contain incorrect addresses.
- Active Directory domain controllers registered in DNS are not online or not running.

Tell me how to transfer the dns-server correctly?
UPD
Here is what ipconfig /all outputs

Microsoft Windows [Version 6.1.7601]
C:\Users\user>ipconfig /all
IP configuration for Windows
Computer name . . . . . . . . . : Notebook113
Primary DNS Suffix . . . . . . :
Node type. . . . . . . . . . . . . : Hybrid Auto tuning enabled. . . . . . : Yes Ethernet adapter LAN connection: Connection DNS suffix . . . . . : Description. . . . . . . . . . . . . : Realtek PCIe GBE Family Controller Physical address. . . . . . . . . : E8-9A-8F-59-D3-60 DHCP server. . . . . . . . . . . : 192.168.1.15 DNS servers. . . . . . . . . . . : 192.168.1.11 192.168.1.4
IP Routing is enabled. . . . : No
WINS proxy enabled. . . . . . . : None
Wireless LAN adapter Wireless network connection:
Environment status. . . . . . . . : The transmission medium is not available.
Connection DNS suffix . . . . . :
Description. . . . . . . . . . . . . : Atheros AR5B97 Wireless Network Adapter
Physical address. . . . . . . . . : 68-A3-C4-89-19-D1
DHCP is enabled. . . . . . . . . . . : Yes
DHCP enabled. . . . . . . . . . . : Yes
Auto tuning is enabled. . . . . . : Yes
IPv4 address. . . . . . . . . . . . : 192.168.1.151(Main)
Subnet mask . . . . . . . . . . : 255.255.255.0
Rent received. . . . . . . . . . : Jul 28, 2015 2:28:57 pm
Lease expires. . . . . . . . . . : Jul 28, 2015 10:28:56 PM
Main Gateway. . . . . . . . . : 192.168.1.10
NetBios over TCP/IP. . . . . . . . : Enabled
Ethernet adapter VirtualBox Host-Only Network: Subnet mask . . . . . . . . . . : 255.255.255.0 Default gateway. . . . . . . . . : IAID DHCPv6 . . . . . . . . . . . : 470417447 DHCPv6 client DUID . . . . . . . : 00-01-00-01-15-8B-33-0E-E8-9A-8F-59-D3-60 DNS servers. . . . . . . . . . . : fec0:0:0:ffff::1%1 fec0:0:0:ffff::2%1 fec0:0:0:ffff::3%1 NetBios over TCP/IP. . . . . . . . : Enabled
Connection DNS suffix . . . . . :
Description. . . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter
Physical address. . . . . . . . . : 08-00-27-00-E8-06
DHCP is enabled. . . . . . . . . . . : No
Auto tuning is enabled. . . . . . : Yes
Link-local IPv6 address. . . : fe80::98b6:895b:4490:397d%19(Primary)
IPv4 address. . . . . . . . . . . . : 192.168.56.1(Main)
Isatap tunnel adapter enabled.{A6B8E153-A5B4-4BAC-98E3-009CA55CF112}:
Environment status. . . . . . . . : The transmission medium is not available.
Connection DNS suffix . . . . . :
Description. . . . . . . . . . . . . : Microsoft ISATAP adapter
Physical adress. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP is enabled. . . . . . . . . . . : No
Auto tuning is enabled. . . . . . : Yes Auto tuning is enabled. . . . . . : Yes Tunnel adapter LAN connection* 2: Environment status. . . . . . . . : The transmission medium is not available. Connection DNS suffix . . . . . :
Isatap tunnel adapter.{537ECBEB-F89C-49ED-8A8F-E62782384346}:
Environment status. . . . . . . . : The transmission medium is not available.
Connection DNS suffix . . . . . :
Description. . . . . . . . . . . . . : Microsoft ISATAP #2 adapter
Physical address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP is enabled. . . . . . . . . . . A : No Description. . . . . . . . . . . . . : Microsoft 6to4 adapter Physical address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP is enabled. . . . . . . . . . . : No Auto tuning is enabled. . . . . . : Yes Tunnel adapter isatap.{FC86C40F-FB23-4CF6-BE11-26DA6CFC99B7}: Environment status. . . . . . . . : The transmission medium is not available.
Connection DNS suffix . . . . . :
Description. . . . . . . . . . . . . : Microsoft ISATAP #3 adapter Environment status. . . . . . . . : The transmission medium is not available. Connection DNS suffix . . . . . : Description. . . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical address. . . . . . . . . : 00-00-00-00-00-00-00-E0 DHCP is enabled. . . . . . . . . . . : No Auto tuning is enabled. . . . . . : Yes
Physical address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP is enabled. . . . . . . . . . . : No
Auto tuning is enabled. . . . . . : Yes
Teredo Tunneling Pseudo-Interface Tunneling Adapter:
C:\Users\user>

192.168.1.11 is 2012r2, 192.168.1.15 is old 2008r2. It turns out I did not transfer dhcp correctly.

Answer 1

"As in the manual - the final step assigned the ip of the old machine to the new machine", I doubt very much, you can see this place in the manual?