[NTSysADM] DHCP failover

[Melvin Backus]

Anyone using DHCP failover on 2012r2?  I'm seeing some unexpected things.  The 
one that particularly surprised me was that server filters don't appear to be 
replicated even though all scopes are replicated between the servers.  Is that 
normal?


Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565
Service Desk | 404-497-1599 | http://servicedesk.byers.com
--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

[NTSysADM] RE: badPwdCount clarification

[Brian Desmond]

Is this correct so far? And if so, at the next attempt the account enters a 
valid password, again to DC2, the new values will be:

PDCe1=0
DC2=0
DC3=0
DC4=0

I’d expect the new values to be

PDCe1=2
DC2=0
DC3=1
DC4=1

I can’t think of why the successful login with chain to the PDCe, which is what 
would decrement its’ local count.

Thanks,
Brian Desmond

w – 312.625.1438 | c – 312.731.3132

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Christopher Bodnar
Sent: Monday, May 16, 2016 2:05 PM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] badPwdCount clarification

Can someone clarify this for me, a little confused on this.

Let’s say I have 4 domain controllers (all 2008 R2) in a single site (PDCE1, 
DC2, DC3, DC4). And let’s say account lockout is set to 5, and there are no 
RODCs in the environment. Here are the various badPwdCount values on the domain 
controllers for a test account:

PDCe1=1
DC2=2
DC3=1
DC4=1

If the test account enters another bad password, the logon sever that services 
the request (say DC2) will increment by 1, as well as the PDCe1. So the new 
values will be:

PDCe1=2
DC2=3
DC3=1
DC4=1
Is this correct so far? And if so, at the next attempt the account enters a 
valid password, again to DC2, the new values will be:

PDCe1=0
DC2=0
DC3=0
DC4=0

Or will they be:

PDCe1=0
DC2=0
DC3=1
DC4=1

So should the value get reset on all domain controllers, or just the PDCE and 
the DC servicing the request?

Thank you,




Christopher Bodnar
Enterprise Architect II, Corporate Office of Technology:Enterprise Architecture 
and Engineering Services

Tel 610-807-6459
3900 Burgess Place, Bethlehem, PA 18017
christopher_bod...@glic.com

[cid:image001.png@01D1326B.600058E0]

The Guardian Life Insurance Company of America

www.guardianlife.com




- This message, and any attachments to 
it, may contain information that is privileged, confidential, and exempt from 
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received this message in error, please notify the sender immediately by return 
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[NTSysADM] RE: DHCP failover

[Stephen Gestwicki]

DHCP failover is missing a very needed feature of automatic replication. I 
created a PowerShell script that I ran from a scheduled task to handle it. This 
is the main line in the script that did the work:
Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force

- Stephen

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 10:31 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] DHCP failover

Anyone using DHCP failover on 2012r2?  I'm seeing some unexpected things.  The 
one that particularly surprised me was that server filters don't appear to be 
replicated even though all scopes are replicated between the servers.  Is that 
normal?


Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565
Service Desk | 404-497-1599 | http://servicedesk.byers.com
--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

[NTSysADM] RE: DHCP failover

[Melvin Backus]

So pardon my apparent blindness, but what critical function would that be?  It 
appears that once the configuration is setup it constantly replicates as part 
of the normal operation.


--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Stephen Gestwicki
Sent: Wednesday, May 18, 2016 11:02 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

DHCP failover is missing a very needed feature of automatic replication. I 
created a PowerShell script that I ran from a scheduled task to handle it. This 
is the main line in the script that did the work:
Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force

- Stephen

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 10:31 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] DHCP failover

Anyone using DHCP failover on 2012r2?  I'm seeing some unexpected things.  The 
one that particularly surprised me was that server filters don't appear to be 
replicated even though all scopes are replicated between the servers.  Is that 
normal?


Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565
Service Desk | 404-497-1599 | http://servicedesk.byers.com
--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

[NTSysADM] RE: DHCP failover

[Dave Lum]

IIRC things like DHCP reservations do not replicate to the failover server 
without help from powershell scripts like the below

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 9:09 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

So pardon my apparent blindness, but what critical function would that be?  It 
appears that once the configuration is setup it constantly replicates as part 
of the normal operation.


--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Stephen Gestwicki
Sent: Wednesday, May 18, 2016 11:02 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

DHCP failover is missing a very needed feature of automatic replication. I 
created a PowerShell script that I ran from a scheduled task to handle it. This 
is the main line in the script that did the work:
Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force

- Stephen

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 10:31 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] DHCP failover

Anyone using DHCP failover on 2012r2?  I'm seeing some unexpected things.  The 
one that particularly surprised me was that server filters don't appear to be 
replicated even though all scopes are replicated between the servers.  Is that 
normal?


Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565
Service Desk | 404-497-1599 | http://servicedesk.byers.com
--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

Attention: Information contained in this message and or attachments is intended 
only for the recipient(s) named above and may contain confidential and or 
privileged material that is protected under State or Federal law. If you are 
not the intended recipient, any disclosure, copying, distribution or action 
taken on it is prohibited. If you believe you have received this email in 
error, please contact the sender with a copy to complia...@ochin.org, delete 
this email and destroy all copies.

RE: [NTSysADM] Windows7/10 mapped drive disconnects

[Poppy Lochridge]

That we have.

To answer some of the other suggestions – there *might* be Offline files 
involved – I’ll check that out today. They started with a pretty default SBS 
server setup, and Offline Files is, I think, a default.
And if that doesn’t give us any results, we will try a logon script.

--Poppy

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Micheal Espinola Jr
Sent: Tuesday, May 17, 2016 2:22 PM
To: ntsysadm@lists.myitforum.com
Subject: Re: [NTSysADM] Windows7/10 mapped drive disconnects

Have you also implemented autodisconnect settings on the server-side?

--
Espi


On Mon, May 16, 2016 at 5:51 PM, Poppy Lochridge 
mailto:po...@netcorps.org>> wrote:
Greetings,

We have a client organization who’s experiencing a problem none of us have seen 
before.

They have a new fileserver – Windows 2012 R2 – and drives mapped via GPO.
As users are working, their mapped drives periodically disconnect – drive icon 
acquires the red “X” and any database programs open (including accounting) 
starts tossing out errors, forcing them to close the databases to continue.
Most of the time, if they just open the mapped drive, Windows reconnects and 
they can re-open what they were working on. Occasionally, they instead get the 
error indicating that the device is in use. Very similar to the old issue 
documented in https://support.microsoft.com/en-us/kb/297684

This wasn’t happening on their old server – a Windows SBS 2008 system. It’s not 
been a smooth migration – we’re still pulling services off of the old system 
and trying to get it decommissioned without taking them down. It also isn’t 
happening on any other network we’re aware of – not ours, nor any other clients 
with similar combinations of systems.

We’ve implemented the “autodisconnect” setting, but it isn’t resolving the 
problem. Wondering if anyone here is encountered something similar?

--P

Poppy Lochridge
Senior Technology Consultant
NetCorps
1245 Pearl Street
Eugene, OR 97401
541-465-1127 x104

po...@netcorps.org
http://www.netcorps.org

[NTSysADM] RE: DHCP failover

[Ken Cornetet]

IMHO, if you need failover, the correct answer is almost always ESX or Hyper-V. 
In the many years that I've been dealing with computers, trying to do failover 
at the application level is usually an exercise in frustration.

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Dave Lum
Sent: Wednesday, May 18, 2016 12:24 PM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

IIRC things like DHCP reservations do not replicate to the failover server 
without help from powershell scripts like the below

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 9:09 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

So pardon my apparent blindness, but what critical function would that be?  It 
appears that once the configuration is setup it constantly replicates as part 
of the normal operation.


--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Stephen Gestwicki
Sent: Wednesday, May 18, 2016 11:02 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover

DHCP failover is missing a very needed feature of automatic replication. I 
created a PowerShell script that I ran from a scheduled task to handle it. This 
is the main line in the script that did the work:
Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force

- Stephen

From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 10:31 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] DHCP failover

Anyone using DHCP failover on 2012r2?  I'm seeing some unexpected things.  The 
one that particularly surprised me was that server filters don't appear to be 
replicated even though all scopes are replicated between the servers.  Is that 
normal?


Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565
Service Desk | 404-497-1599 | http://servicedesk.byers.com
--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.

Attention: Information contained in this message and or attachments is intended 
only for the recipient(s) named above and may contain confidential and or 
privileged material that is protected under State or Federal law. If you are 
not the intended recipient, any disclosure, copying, distribution or action 
taken on it is prohibited. If you believe you have received this email in 
error, please contact the sender with a copy to 
complia...@ochin.org, delete this email and 
destroy all copies.

Re: [NTSysADM] RE: DHCP failover

[Sean Martin]

I tend to disagree with this statement. While server virtualization provides 
great HA and Failover capabilities, I've always found that leveraging an 
application's built-in HA/Redundancy/Replication capabilities (i.e. SQL, 
Exchange, etc.) generally provides better performance, easier supportability, 
and is generally more reliable. We implemented DHCP Failover on Windows 2012R2 
in our vSphere environment. Aside from having to schedule replication of 
reservations, its been pretty hands off and just works.

- Sean

> On May 18, 2016, at 11:23 AM, Ken Cornetet 
>  wrote:
> 
> IMHO, if you need failover, the correct answer is almost always ESX or 
> Hyper-V. In the many years that I’ve been dealing with computers, trying to 
> do failover at the application level is usually an exercise in frustration.
>  
> From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 
> On Behalf Of Dave Lum
> Sent: Wednesday, May 18, 2016 12:24 PM
> To: ntsysadm@lists.myitforum.com
> Subject: [NTSysADM] RE: DHCP failover
>  
> IIRC things like DHCP reservations do not replicate to the failover server 
> without help from powershell scripts like the below
>  
> From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 
> On Behalf Of Melvin Backus
> Sent: Wednesday, May 18, 2016 9:09 AM
> To: ntsysadm@lists.myitforum.com
> Subject: [NTSysADM] RE: DHCP failover
>  
> So pardon my apparent blindness, but what critical function would that be?  
> It appears that once the configuration is setup it constantly replicates as 
> part of the normal operation.
>  
>  
> --
> There are 10 kinds of people in the world...
>  those who understand binary and those who don't.
>  
> From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 
> On Behalf Of Stephen Gestwicki
> Sent: Wednesday, May 18, 2016 11:02 AM
> To: ntsysadm@lists.myitforum.com
> Subject: [NTSysADM] RE: DHCP failover
>  
> DHCP failover is missing a very needed feature of automatic replication. I 
> created a PowerShell script that I ran from a scheduled task to handle it. 
> This is the main line in the script that did the work:
> Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force
>  
> - Stephen
>  
> From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] 
> On Behalf Of Melvin Backus
> Sent: Wednesday, May 18, 2016 10:31 AM
> To: ntsysadm@lists.myitforum.com
> Subject: [NTSysADM] DHCP failover
>  
> Anyone using DHCP failover on 2012r2?  I’m seeing some unexpected things.  
> The one that particularly surprised me was that server filters don’t appear 
> to be replicated even though all scopes are replicated between the servers.  
> Is that normal?
>  
> 
> Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 
> 404.497.1565
> Service Desk | 404-497-1599 | http://servicedesk.byers.com
> --
> There are 10 kinds of people in the world...
>  those who understand binary and those who don't.
>  
> Attention: Information contained in this message and or attachments is 
> intended only for the recipient(s) named above and may contain confidential 
> and or privileged material that is protected under State or Federal law. If 
> you are not the intended recipient, any disclosure, copying, distribution or 
> action taken on it is prohibited. If you believe you have received this email 
> in error, please contact the sender with a copy to complia...@ochin.org, 
> delete this email and destroy all copies.

Re: [NTSysADM] RE: DHCP failover

[Andrew S. Baker]

I have to agree with Sean.
The overhead of server virtualization for something like redundancy of DHCP is
overkill in many ways.
The HA now available for DHCP service is nice, and only really missing two-way
sync. At present, one-way full replication is currently available via GUI or
script.

Automatic syncing of scope configuration changes between 2 DHCP failover 
servers DHCP Failover is a new feature in Windows Server 2012 which provides 
for high
availability of DHCP service. Two DHCP servers in a failover relationship… 
blogs.technet.microsoft.com


DHCP 2012 r2 static reservations replication not workingBritV8 | BritV8 So, we 
updated our DHCP Servers to 2012 R2. We setup DHCP Failover, which was
easy to setup and seems very nice. britv8.com

Regards,




ASB
http://XeeMe.com/AndrewBaker

Providing Expert Technology Consulting Services for the SMB market…

GPG: 1AF3 EEC3 7C3C E88E B0EF 4319 8F28 A483 A182 EF3A










Sent with Mixmax





On Wed, May 18, 2016 3:46 PM, Sean Martin seanmarti...@gmail.com wrote:
I tend to disagree with this statement. While server virtualization provides
great HA and Failover capabilities, I've always found that leveraging an
application's built-in HA/Redundancy/Replication capabilities (i.e. SQL,
Exchange, etc.) generally provides better performance, easier supportability,
and is generally more reliable. We implemented DHCP Failover on Windows 2012R2
in our vSphere environment. Aside from having to schedule replication of
reservations, its been pretty hands off and just works.

- Sean
On May 18, 2016, at 11:23 AM, Ken Cornetet < 
ken.corne...@kimballelectronics.com > wrote:

IMHO, if you need failover, the correct answer is almost always ESX or Hyper-V.
In the many years that I’ve been dealing with computers, trying to do failover
at the application level is usually an exercise in frustration.



From: listsad...@lists.myitforum.com [ mailto:listsad...@lists.myitforum.com ] 
On Behalf Of Dave Lum
Sent: Wednesday, May 18, 2016 12:24 PM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover



IIRC things like DHCP reservations do not replicate to the failover server
without help from powershell scripts like the below



From: listsad...@lists.myitforum.com [ mailto:listsad...@lists.myitforum.com ] 
On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 9:09 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover



So pardon my apparent blindness, but what critical function would that be? It
appears that once the configuration is setup it constantly replicates as part of
the normal operation.





--
There are 10 kinds of people in the world...
those who understand binary and those who don't.



From: listsad...@lists.myitforum.com [ mailto:listsad...@lists.myitforum.com ] 
On Behalf Of Stephen Gestwicki
Sent: Wednesday, May 18, 2016 11:02 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover



DHCP failover is missing a very needed feature of automatic replication. I
created a PowerShell script that I ran from a scheduled task to handle it. This
is the main line in the script that did the work:

Invoke-DhcpServerv4FailoverReplication -ComputerName $PrimaryDHCP -Force



- Stephen



From: listsad...@lists.myitforum.com [ mailto:listsad...@lists.myitforum.com ] 
On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 10:31 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] DHCP failover



Anyone using DHCP failover on 2012r2? I’m seeing some unexpected things. The one
that particularly surprised me was that server filters don’t appear to be
replicated even though all scopes are replicated between the servers. Is that
normal?




Melvin Backus | Sr. Systems Engineer | Byers Engineering Company | 404.497.1565

Service Desk | 404-497-1599 | http://servicedesk.byers.com

--
There are 10 kinds of people in the world...
those who understand binary and those who don't.



Attention: Information contained in this message and or attachments is intended
only for the recipient(s) named above and may contain confidential and or
privileged material that is protected under State or Federal law. If you are not
the intended recipient, any disclosure, copying, distribution or action taken on
it is prohibited. If you believe you have received this email in error, please
contact the sender with a copy to complia...@ochin.org , delete this email and 
destroy all copies.

RE: [NTSysADM] RE: DHCP failover

[Dave Lum]

I use 2012 R2 DHCP redundancy at two businesses and I like it. One client has a 
small single /24 network (two sites, DHCP at each so I’m covered for IP if the 
link breaks). Another business - %dayjob% actually – is far more diverse and 
getting DCHP helpers on the managed switches took a bit of effort from the 
network team, but other than that and implementing the Powershell script, all 
good to go.

Another network that’s really too small to justify DHCP redundancy I have a 
DHCP backup script that copies the DHCP backup to network location and fires 
and email to the IT team each week of it completing and where the backup lives 
- so I have those settings / reservations to throw on any fresh DHCP server 
should it need to be stood up.

Dave

From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On 
Behalf Of Andrew S. Baker
Sent: Wednesday, May 18, 2016 1:30 PM
To: ntsysadm@lists.myitforum.com
Subject: Re: [NTSysADM] RE: DHCP failover

I have to agree with Sean.

The overhead of server virtualization for something like redundancy of DHCP is 
overkill in many ways.

The HA now available for DHCP service is nice, and only really missing two-way 
sync.  At present, one-way full replication is currently available via GUI or 
script.


Automatic syncing of scope configuration changes between 2 DHCP failover 
servers 


DHCP Failover is a new feature in Windows Server 2012 which provides for high 
availability of DHCP service.  Two DHCP servers in a failover relationship… 




blogs.technet.microsoft.com

[Mixmax]







DHCP 2012 r2 static reservations replication not workingBritV8 | BritV8 


So, we updated our DHCP Servers to 2012 R2. We setup DHCP Failover, which was 
easy to setup and seems very nice. 




britv8.com

[Mixmax]







Regards,

 ASB
 http://XeeMe.com/AndrewBaker

 Providing Expert Technology Consulting Services for the SMB market…

 GPG: 1AF3 EEC3 7C3C E88E B0EF 4319 8F28 A483 A182 EF3A



Sent with 
Mixmax
[https://app.mixmax.com/api/track/v2/kEAPfiJiRPB7d0i67/gIt92YuwWah12ZAVmbvpnYzFmI/i02bj5Sb1J3bmRXa51mLzR3cpxGQtRWYzl3c05mI]






On Wed, May 18, 2016 3:46 PM, Sean Martin 
seanmarti...@gmail.com wrote:
I tend to disagree with this statement. While server virtualization provides 
great HA and Failover capabilities, I've always found that leveraging an 
application's built-in HA/Redundancy/Replication capabilities (i.e. SQL, 
Exchange, etc.) generally provides better performance, easier supportability, 
and is generally more reliable. We implemented DHCP Failover on Windows 2012R2 
in our vSphere environment. Aside from having to schedule replication of 
reservations, its been pretty hands off and just works.

- Sean

On May 18, 2016, at 11:23 AM, Ken Cornetet 
mailto:ken.corne...@kimballelectronics.com>>
 wrote:

IMHO, if you need failover, the correct answer is almost always ESX or Hyper-V. 
In the many years that I’ve been dealing with computers, trying to do failover 
at the application level is usually an exercise in frustration.



From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Dave Lum
Sent: Wednesday, May 18, 2016 12:24 PM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover



IIRC things like DHCP reservations do not replicate to the failover server 
without help from powershell scripts like the below



From: listsad...@lists.myitforum.com 
[mailto:listsad...@lists.myitforum.com] On Behalf Of Melvin Backus
Sent: Wednesday, May 18, 2016 9:09 AM
To: ntsysadm@lists.myitforum.com
Subject: [NTSysADM] RE: DHCP failover



So pardon my apparent blindness, but what critical function would that be?  It 
appears that once the configuration is setup it constantly replicates as part 
of the normal operation.





--
There are 10 kinds of people in the world...
 those who understand binary and those who don't.



From: listsad...@lists.myitfor