Proxmox Node question mark issue

[Swanand]

I have installed Proxmox and created the cluster of 3 nodes, but yesterday, suddenly, some of the nodes are showing a question mark on them, but the node is communicating properly, I can do SSH. Can anyone help me to solve this issue

 

[Johannes S]

How is your network condigured? Which kind of network cards are you using? Does corosync have it's own dedicated network link?

 

[Swanand]

so my network setting is like i have two port with 25G and created the bond with LACP and then assigned it to the bridge and then create a vlan for that bridge and assigned the IP to it same on other two node and that same i have used it for the cluster also