SOLVED Clients roam to another site

[awachens]

Afternoon!!
Have clients changing to another site system and I don't know why.
I'm new in this client and I detected this few days ago. I want to know how can I troubleshoot this because I check boundaries and we have set correctly.
I check locationservices.log and I didn't see any errors, just is looking for wrong site (XXY for example) and not AAA as I want .
But I can see this:

How is possible? Is a wrong configure at the other site? I can't see the configure of the other site (XXY) because we haven't access to it.... But I don't like this Autodiscover Site and at next line assign directly the wrong code automatically...
If I find at registry I can see how the wrong site code is assigned.
If I find at configuration manager client to find the correct site, take the new site again.
Maybe if I reinstall the client it's possible it gets the correct site but I want make sure this not pass again and understand why my clients are changing to another site ...
We haven't GPO to set the site code.
I don't know why automatically they roam....

TIA!!!

 

[Prajwal Desai]

Do you have overlapping boundaries?. If you have multiple ConfigMgr setups in your environment, this is bound to happen if its not configured correctly.

 

[awachens]

Good morning sir!!
Thanks for answer.
I have site XXY with boundary:
Subnet - 152.34.129.0
Subnet - 152.34.129.128

I have site AAA with boundary:
Subnet - 152.34.129.0
Subnet - 152.34.129.128

I don't know how to solve this... Because all environment is configured with subnets ...
Is this normal? It's best practice?

EDIT: For example my client with issue have: 152.34.129.172 - 255.255.255.0
It's a \24 .. So... Why split the subnet? Where is this machine inside?
Subnet - 152.34.129.0 OR Subnet - 152.34.129.128 ¿?

EDIT2: Subnets are defined WITHOUT mask and network....
Thanks a lot!

 

[Prajwal Desai]

So both the XXY and AAA sites have same boundaries for clients?

 

[awachens]

Good morning!
Yes both sites have same boundaries defined and… I don’t know if it’s good practice create it without network and mask… How sccm understand this? Like a 255.255.255.0?

TIA!!

 

[awachens]

Solved!!!

My colleague was using a wrong install command.
I'm new at this client and I don't know how they are installing the client.
Is SMSMP switch mandatory?
When we should use?

Thanks to all!!!!