Server looses Debug mode after a restart

Hello,
At the NWDS there is an option to enable the Server debug mode. When I do that the server restarts and debug mode is on. The problem is that if I restart the server again it looses the debug mode and than I have to enable it again from the NWDS (Which, again, requires a restart). The same symptom is happen if I do the enable through the Config tool at the Debug tab.
Any idea why this happen?
Roy

Hey Shubhadip,
I think you misunderstood my problem: I did save it, otherwise how the debig mode will be on. The problem is that after ANOTHER restart (after the restart to enable the debug mode) it loses the debug mode again.
Roy

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Hello,
We are running 2008 R2 domain with one physical DC and other running in VM on Hyper-V host (2008 R2 Standard). The host has 4 NICs and is configured to use one physical NIC for itself (management) and the hyper-v guest is configured to use another dedicated/physical
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OK, I'm not at the office now, but took my time to test out the restart scenarios on problematic virtual guest remotely.
No dice, same as it was, everything works fine after guest has IP configured in DHCP mode (IP reservation of 192.168.1.5 for specific MAC address) and it doesn't work after restart in static IP mode (same address, works before restart of guest).
I also took "arp -a" outputs at each step from host server and that was always saying there is only a single host (192.168.1.5 = VDC = problematic virtual guest) assigned to that IP address and always with same MAC, so that pretty much rules out
ARP/MAC troubles and no issues with switches/routers getting spoofed. Problem is most likely with the virtual guest (WS2008R2) or within the host running same OS.
Here are outputs:
A) VDC has IP configured in DHCP mode - always same, survives through restart (all works)
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : CD.lan
Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter
Physical Address. . . . . . . . . : 00-15-5D-01-D3-00
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b9af:6679:3142:8799%13(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, January 30, 2014 5:34:48 PM
Lease Expires . . . . . . . . . . : Friday, February 07, 2014 5:35:26 PM
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.4.5
DHCPv6 IAID . . . . . . . . . . . : 268440925
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-6F-5F-C2-00-15-5D-01-D3-00
DNS Servers . . . . . . . . . . . : 192.168.1.5
192.168.4.5
NetBIOS over Tcpip. . . . . . . . : Enabled
ARP -a output from host server at that time:
Interface: 192.168.1.4 --- 0xc
Internet Address Physical Address Type
192.168.1.5 00-15-5d-01-d3-00 dynamic
B) VDC has IP configured in static mode - BEFORE RESTART (all works)
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter
Physical Address. . . . . . . . . : 00-15-5D-01-D3-00
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b9af:6679:3142:8799%13(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 268440925
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-6F-5F-C2-00-15-5D-01-D3-00
DNS Servers . . . . . . . . . . . : 192.168.1.5
192.168.4.5
NetBIOS over Tcpip. . . . . . . . : Enabled
ARP -a output from host server at that time:
Interface: 192.168.1.4 --- 0xc
Internet Address Physical Address Type
192.168.1.5 00-15-5d-01-d3-00 dynamic
C) VDC has the same IP configured in static mode - AFTER RESTART (no more network connectivity at all, LAN in Public zone)
Windows IP Configuration
Host Name . . . . . . . . . . . . : VDC
Primary Dns Suffix . . . . . . . : CD.lan
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : CD.lan
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter
Physical Address. . . . . . . . . : 00-15-5D-01-D3-00
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b9af:6679:3142:8799%13(Preferred)
Autoconfiguration IPv4 Address. . : 169.254.135.153(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 268440925
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-6F-5F-C2-00-15-5D-01-D3-00
DNS Servers . . . . . . . . . . . : 192.168.1.5
192.168.4.5
NetBIOS over Tcpip. . . . . . . . : Enabled
ARP -a output from host server at that time:
Interface: 192.168.1.4 --- 0xc
Internet Address Physical Address Type
192.168.1.5 00-15-5d-01-d3-00 dynamic
Throughout the testing, the hyper-v host IP configuration and IPconfig output was always staying same.
The Network Connection #2 is the only one the host uses (not shared with hyper-v guests).
The Network Connection #4 is assigned to Microsoft Virtual Switch hence why it doesn't show up in results, like below:
Windows IP Configuration
Host Name . . . . . . . . . . . . : HYPER-V
Primary Dns Suffix . . . . . . . : CD.lan
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : CD.lan
Ethernet adapter Local Area Connection 3:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter #3
Physical Address. . . . . . . . . : 9C-8E-99-52-15-91
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Local Area Connection 2:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter #2
Physical Address. . . . . . . . . : 9C-8E-99-52-15-90
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::dc78:8a3b:38a5:7af3%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.1.254
DHCPv6 IAID . . . . . . . . . . . : 312250009
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1A-67-52-8F-9C-8E-99-52-15-93
DNS Servers . . . . . . . . . . . : 192.168.4.5
192.168.1.5
NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP Ethernet 1Gb 4-port 331i Adapter
Physical Address. . . . . . . . . : 9C-8E-99-52-15-93
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
On Monday I will install more test guests in Hyper-V host (WS2008R2), in variety of flavors like 7x64, 8.1x64, ws2012r2, and see if they show similar problems with static IP configuration when utilizing a dedicated NIC from host server.
Don't get me wrong, I can live with virtual DC running on DHCP IP reservation (which is based on MAC), because the virtual DC pretty much requires a physical PDC (hosting also DHCP in my network) to be present for safety reasons ... however I prefer a static
IP configuration on all servers, hence my question and surprise why it doesn't work.

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