> On Nov 14, 2025, at 4:37 AM, Robert Sander <[email protected]> 
> wrote:
> 
> Hi,
> 
> Am 14.11.25 um 9:44 AM schrieb Alexander Leutz:
> 
>> Ceph is my storage, also I name the communication as storage network.
>> The proxmox ceph servers has 2 1Gb management ports an 2 10 Gb ports for 
>> storage network.
>> I set the mon public and the osd cluster networks to the privat IP range 
>> 10.10.x.x:
>> ceph config set mon public_network 10.10.x.x/24
>> ceph config set osd cluster_network 10.10.x.x/24
> 
> In your case I would not setup a separate cluster network.

Indeed.  To be clear, Alexander, do you have those two 10GE ports bonded? If 
so, then I agree with Herr Sander that there is no benefit to defining the 
cluster_network, and indeed you may be confusing code by doing so.  The cluster 
network should only be defined if it's *different* from the public network.  
The public network is how clients communicate with the Ceph cluster.  If 
there's a cluster_network, it is only used for internal replication and 
heartbeating within Ceph. 

> It is optional and only recommended if you have a network that is at least 
> twice as fast as the public network.

Well, say someone has two dual-port 10GE NICs in each system.  They could 
either bond all four together (which I *think* works but haven't tried) for a 
public network, or bond one port on each NIC together for the public, and one 
on each for the private network.

I do usually recommend that people not bother with a cluster network if they're 
using 25GE or better, especially with very dense nodes.



> 
>> After this I only see this as paramter in the GUI screen, under host / ceph 
>> / configuration in the section Configuration Database
>> Und [global] I still see a second entry named public_network = 192.168.x.x 
>> (this is my management network of the proxmox host).
> 
> Change in the config db do not get written to the ceph.conf file.

I think he's writing about the Dashboard, not ceph.conf

> 
> You can remove this setting from the ceph.conf file by using an editor as it 
> is now in the config db.

If it's in ceph.conf, then absolutely.  All you need in there is the mon 
information, maybe the fsid.

> 
> Regards
> -- 
> Robert Sander
> Linux Consultant
> 
> Heinlein Consulting GmbH
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> 
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