Hello
We don't undertand. Why did the problem happen right after the changing, not before?
Is the optical fibre caused to the problem?
We tried many ways and the problem is still not solved. We need your help to solve the problem. Please, post up your comments and suggestions. Thank you.
BEFORE CHANING OF NETWORK INFRASTRUCTURE BETWEEN 2 HUB LOCATIONS
2 HUB locations: (HUB is a Cisco Router)
DMVPN encrypted tunnel and Cisco DHCP on each location.
When HUB A is down and only the clients on the HUB A are down or opposite
HUB A: speed up 15 mb and speed down 15 mb
192.168.0.0/23
Primary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.0.2
Sub:255.255.253.0
GW: IP: 192.168.0.1
DNS: 192.168.0.2 and 192.168.2.2
HUB B: speed up 10 mb and speed down 10 mb
192.168.2.0/23
Secondary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.2.2
Sub:255.255.253.0
GW: IP: 192.168.2.1
DNS: 192.168.0.2 and 192.168.2.2
3 branches
DMVPN encrypted tunnel to HUBs and Cisco DHCP on each location.
When HUB A is down and the clients from 3 branches will talk HUB B
Branch 1: speed up 15 mb and speed down 10 mb
192.168.4.0/24
Sub: 255.255.255.0
GW: 192.168.4.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 2: speed up 4 mb and speed down 0,5 mb
192.168.5.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 3: speed up 2 mb and speed down 2 mb
192.168.6.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Roaming profile, background image and bookmarks of the Internet Explorer worked
GPOs and login worked.
Everyting worked well.
AFTER CHANING OF NETWORK INFRASTRUCTURE BETWEEN 2 HUB LOCATIONS
2 HUB locations are changed: (HUB is a Cisco Router)
DMVPN encrypted tunnel.
Now it is a optical fibre between HUBs
When HUB A is down and the clients on the HUB A will talk to HUB B or opposite
Cisco DHCP on each location: 192.168.0.0/22
All clients from HUBs have internet access via HUB A with speed up/down 100 mB
Default gateway for HUBs and the clients: 192.168.3.254
HUB A: speed up 15 mb and speed down 15 mb
192.168.0.0/22 and excluded 192.168.1.255-192.168.3.253
Primary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.0.2
Sub:255.255.252.0
GW: IP: 192.168.0.1
DNS: 192.168.0.2 and 192.168.2.2
HUB B: speed up 10 mb and speed down 10 mb
192.168.0.0/22 excluded 192.168.0.1-192.168.2.1
Secondary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.2.2
Sub:255.255.253.0
GW: IP: 192.168.2.1
DNS: 192.168.0.2 and 192.168.2.2
NOT CHANGING AT 3 branches
DMVPN encrypted tunnel to HUBs and Cisco DHCP on each location.
When HUB A is down and the clients from 3 branches will talk HUB B
Branch 1: speed up 15 mb and speed down 10 mb
192.168.4.0/24
Sub: 255.255.255.0
GW: 192.168.4.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 2: speed up 4 mb and speed down 0,5 mb
192.168.5.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 3: speed up 2 mb and speed down 2 mb
192.168.6.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Roaming profile, bookmarks of the Internet Explorer, GPOs and login and background image
The clients on HUBs and Branch 1 are working very good, except the clients on Branch 2 and 3, they can not get GPOs and no background image
We found out that it is slow link on the Branch 2 and 3. That is why Branch 2 and 3 clients could not get GPOs and no background image.
Error on clients
Event ID: 1054
Source: Userenv
Type: Error
Description: Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or exist or could not be contacted). Group Policy processing aborted.
3 ways can solve the problem
---------------------------------------------------------------
Registry settings
Registry subkey: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System Value name: GroupPolicyMinTransferRate Value type: DWORD Value Data: 0
Registry subkey: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System Value name: GroupPolicyMinTransferRate Value type: DWORD Value Data: 0
OR same registry values at these locations…! ( depend on OS I think )
• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
• HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Group Policy settings
Policy location: Computer Configuration\Administrative Templates\System\Group Policy Policy name: Group Policy slow link detection Policy setting: Enabled with a value of 0
Policy location: User Configuration\Administrative Templates\System\Group Policy Policy name: Group Policy slow link detection Policy setting: Enabled with a value of 0
None of the above Registry settings ended up working!
What ended up working is documented below…
1. Login to the target system as admin or run a cmd console as admin
2. cd to c:\windows\system32
3. run mmc gpedit.msc as admin
4. in both Computer Configuration and User Configuration, go to Administrative Templates
5. go to System, Group Policy
6. Double click the GP Slow Link Detection
7. Enable the policy and set it to 0 ( zero ) to disable “Group Policy slow link detection” or set the link rate to a slower link speed so the policies will be applied on this link.
------------------------------------------------
We don't undertand. Why did the problem happen right after the changing, not before?
Is the optical fibre caused to the problem?
We tried many ways and the problem is still not solved. We need your help to solve the problem. Please, post up your comments and suggestions. Thank you.
BEFORE CHANING OF NETWORK INFRASTRUCTURE BETWEEN 2 HUB LOCATIONS
2 HUB locations: (HUB is a Cisco Router)
DMVPN encrypted tunnel and Cisco DHCP on each location.
When HUB A is down and only the clients on the HUB A are down or opposite
HUB A: speed up 15 mb and speed down 15 mb
192.168.0.0/23
Primary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.0.2
Sub:255.255.253.0
GW: IP: 192.168.0.1
DNS: 192.168.0.2 and 192.168.2.2
HUB B: speed up 10 mb and speed down 10 mb
192.168.2.0/23
Secondary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.2.2
Sub:255.255.253.0
GW: IP: 192.168.2.1
DNS: 192.168.0.2 and 192.168.2.2
3 branches
DMVPN encrypted tunnel to HUBs and Cisco DHCP on each location.
When HUB A is down and the clients from 3 branches will talk HUB B
Branch 1: speed up 15 mb and speed down 10 mb
192.168.4.0/24
Sub: 255.255.255.0
GW: 192.168.4.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 2: speed up 4 mb and speed down 0,5 mb
192.168.5.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 3: speed up 2 mb and speed down 2 mb
192.168.6.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Roaming profile, background image and bookmarks of the Internet Explorer worked
GPOs and login worked.
Everyting worked well.
AFTER CHANING OF NETWORK INFRASTRUCTURE BETWEEN 2 HUB LOCATIONS
2 HUB locations are changed: (HUB is a Cisco Router)
DMVPN encrypted tunnel.
Now it is a optical fibre between HUBs
When HUB A is down and the clients on the HUB A will talk to HUB B or opposite
Cisco DHCP on each location: 192.168.0.0/22
All clients from HUBs have internet access via HUB A with speed up/down 100 mB
Default gateway for HUBs and the clients: 192.168.3.254
HUB A: speed up 15 mb and speed down 15 mb
192.168.0.0/22 and excluded 192.168.1.255-192.168.3.253
Primary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.0.2
Sub:255.255.252.0
GW: IP: 192.168.0.1
DNS: 192.168.0.2 and 192.168.2.2
HUB B: speed up 10 mb and speed down 10 mb
192.168.0.0/22 excluded 192.168.0.1-192.168.2.1
Secondary DC/ADC/DNS Windows Server 2008 R2
IP: 192.168.2.2
Sub:255.255.253.0
GW: IP: 192.168.2.1
DNS: 192.168.0.2 and 192.168.2.2
NOT CHANGING AT 3 branches
DMVPN encrypted tunnel to HUBs and Cisco DHCP on each location.
When HUB A is down and the clients from 3 branches will talk HUB B
Branch 1: speed up 15 mb and speed down 10 mb
192.168.4.0/24
Sub: 255.255.255.0
GW: 192.168.4.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 2: speed up 4 mb and speed down 0,5 mb
192.168.5.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Branch 3: speed up 2 mb and speed down 2 mb
192.168.6.0/24
Sub: 255.255.255.0
GW: 192.168.5.1
DNS: 192.168.0.2 and 192.168.2.2
Roaming profile, bookmarks of the Internet Explorer, GPOs and login and background image
The clients on HUBs and Branch 1 are working very good, except the clients on Branch 2 and 3, they can not get GPOs and no background image
We found out that it is slow link on the Branch 2 and 3. That is why Branch 2 and 3 clients could not get GPOs and no background image.
Error on clients
Event ID: 1054
Source: Userenv
Type: Error
Description: Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or exist or could not be contacted). Group Policy processing aborted.
3 ways can solve the problem
---------------------------------------------------------------
Registry settings
Registry subkey: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System Value name: GroupPolicyMinTransferRate Value type: DWORD Value Data: 0
Registry subkey: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System Value name: GroupPolicyMinTransferRate Value type: DWORD Value Data: 0
OR same registry values at these locations…! ( depend on OS I think )
• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
• HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
Group Policy settings
Policy location: Computer Configuration\Administrative Templates\System\Group Policy Policy name: Group Policy slow link detection Policy setting: Enabled with a value of 0
Policy location: User Configuration\Administrative Templates\System\Group Policy Policy name: Group Policy slow link detection Policy setting: Enabled with a value of 0
None of the above Registry settings ended up working!
What ended up working is documented below…
1. Login to the target system as admin or run a cmd console as admin
2. cd to c:\windows\system32
3. run mmc gpedit.msc as admin
4. in both Computer Configuration and User Configuration, go to Administrative Templates
5. go to System, Group Policy
6. Double click the GP Slow Link Detection
7. Enable the policy and set it to 0 ( zero ) to disable “Group Policy slow link detection” or set the link rate to a slower link speed so the policies will be applied on this link.
------------------------------------------------
