[Samba] sites and subnets

James lingpanda101 at gmail.com
Tue Dec 30 06:48:31 MST 2014

Hello David,

     Currently use Sites and Services across 4 sites. We do not 
experience the issues you are describing. Running Samba 4.1.13. I do 
know the option to turn off 'Bridge All Site Links' does not work. Using 
internal DNS with Google or Open DNS to forward queries.

On 12/29/2014 6:26 PM, David Bear wrote:
> We had a samba 4.1.9 AD DC running since July. We have 3 campuses and
> brought up a secondary AD  at another campus. This setup seemed to be
> running as expected. We could see our primary AD DC authenticating requests
> fine. We could see the secondary AD authenticating requests as well at our
> second campus.
> Then we started experiencing bandwidth issues between our campuses. Our
> metro-etherlink should have delivered 5 mbps but dropped to have very
> sporadic performance. As we worked with our telecom provider to stabilize
> this, we thought we might also improve things by using the AD sites and
> services tool to define where our subnets were and hopefully control which
> DC handled auth requests.
> About this same time we notice that DNS queries were timing out. We pointed
> all DNS requests to our firewall. We forward requests for our AD domain to
> our primary AD DC. This helped a lot. However we then identified our AD DC
> as the problem for dns requests. It would time out frequently.
> Over a couple of weeks we notices performance degrading rapidly on our AD
> DC. We found samba would consume 99% cpu -- and start to grow in memory
> consumption.
> The big question is could the sites and services tool have triggered some
> bug in samba ? So much time has elapse I don't see that it is possible to
> go back and trouble shoot that way we should.
> I'm just wondering if there are any known issues with sites and services --
> or possible issues that could have arisen because of this tool .


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