DFS implementation question

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  • Last Post 14 April 2016
Llara posted this 08 April 2016

Hi, 
I have the following question I've created a DFS name space \domain.com\DFS\
I've created a shared folder on dc01 and dc02
public target folder 
dc01\public - target folder 
dc02\public - target folder 
My understanding is that when a user types \domain.com\DFS\public users will either go to \dc01\public or \dc02\public (whatever server responds first, generally based on AD sites) 
So far this is what I've seen during my testing, however I want my users to always go to \dc01\public and not to \dc02\public so enabled one and disabled the other.  
dc01\public - target folder  - ENABLED 
dc02\public - target folder  - DISABLED
I am confused with the results because with \dc02\public - target folder  - DISABLED I am still getting my test users referred to \dc02\public  
My goal is to leave one enabled and one disabled so that users are only referred to one of the two servers/shares while the other one is disabled. Then when needed I would like to switch the enabled/disabled and change the referral to the other server so users go to it when they hit the dfs namespace. 
Am I doing something wrong? Missing something...
Thank you

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daemonr00t posted this 08 April 2016

DFS referals are managed by the server holding the PDC FSMO, is that fellow doing fine?How about topology and convergence of the directory?Are all sites/subnets properly declared? ~d 

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Llara posted this 08 April 2016

I was told that after I've disabled the folder target I need to force AD replication and dfsr replication by using dfsrdiag pollad
After this the clients will still continue to go the disabled folder target until the client referral time expires 300 ms. 
I haven't been able to test this yet but I am trying to get feedback. 
I am currently testing this with 2 DC and 2 dfsr servers 1 client OS everything within the same site. Nothing wrong with replication. 

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ZJORZ posted this 09 April 2016

You can also configure dfs to always target a specific target (higher priority). When that target has become unavailable clients will target the target with lower priority



Met vriendelijke groet / Kind regards,


Jorge de Almeida Pinto



E-Mail:

JorgeDeAlmeidaPinto@xxxxxxxxxxxxxxxx



Tel.: +31-(0)6-26.26.62.80



(+++Sent from my mobile device +++)


(Apologies for any typos)

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ZJORZ posted this 10 April 2016

That's not accurate. Any DC can give out referrals. Dfs based changes are always processed on the pdc. Root servers by default contact the pdc to get dfs based info. You can change that behavior to have the root servers contact the nearest dc for dfs based

info



Met vriendelijke groet / Kind regards,


Jorge de Almeida Pinto



E-Mail:

JorgeDeAlmeidaPinto@xxxxxxxxxxxxxxxx



Tel.: +31-(0)6-26.26.62.80



(+++Sent from my mobile device +++)


(Apologies for any typos)

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Llara posted this 10 April 2016

Thanks Jorge. If we have a referral disabled and one enabled and we want to switch them what's the best recommendation in order to get the clients pointed to the new active one as soon as possible? The passive will be DR and we want to manually control the switch over so priority isn't appropriate for this scenario. 


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ZJORZ posted this 14 April 2016

It has been quite some time that I worked with DFS… Clients have a referral cache with the available referrals. If not mistaken, a disabled referral will appear in the cache. So when your primary dies, all your clients will complain until the referral cache has expired. The same applies for DCs, root servers. In your scenario I would configure the primary target to always be used and only switch to the other target when the first is not available. But then again, what is the definition of not available? Target down, network/routing/firewall issues, etc? Met vriendelijke groeten / Kind regards, Jorge de Almeida Pinto*: JorgeDeAlmeidaPinto@xxxxxxxxxxxxxxxx(: +31 (0)6 26.26.62.80 Description: Description: Description: Description: Think Green 

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