Proxmox cluster (3 nodes) / cluster private networks / 10G SFP+ no trafic

[ThierryIT69]

Hello,
When I added my cluster, I selected a dedicated, separate network link for cluster traffic.
However, it appears there is no traffic between my nodes.
I performed a migration test between nodes, and when I checked my Unifi devices (aggregation switch), there was no traffic detected.
When the migration is active, I have an speed average of 120MiB/s.

On each nodes, as dedicated network I have:
- vmbr101 Active: yes, Autostart : yes, Vlan aware: yes
- the cluster network is 192.168.101.0/29

root@prx-node1:~# pvecm status
Cluster information
-------------------
Name:             cluster-01
Config Version:   3
Transport:        knet
Secure auth:      on

Quorum information
------------------
Date:             Sat Mar 14 09:28:55 2026
Quorum provider:  corosync_votequorum
Nodes:            3
Node ID:          0x00000001
Ring ID:          1.2f
Quorate:          Yes

Votequorum information
----------------------
Expected votes:   3
Highest expected: 3
Total votes:      3
Quorum:           2 
Flags:            Quorate

Membership information
----------------------
    Nodeid      Votes Name
0x00000001          1 192.168.101.10 (local)
0x00000002          1 192.168.101.11
0x00000003          1 192.168.101.13

Any ideas where the mistake is ?

Thx

 

[UdoB]

cluster traffic

I believe that term lacks a fixed meaning in PVE context. (Is it Corosync? Migration? Management? What is it?)

For migration you can specify the to-be-used network under Datacenter --> Options --> Migration Settings --> Network