can't ping between nodes

[proxwolfe]

This is driving me nuts:

I have two servers configured with pve 6.4.13. Each has a LAN connection to the management network and one to the DMZ. Mgmt-NIC(bridges) have static IPs. DMZ-NIC(bridges) have no IPs (the vms get their IPs over these bridges).

From each node I can ping the other's mgmt-IP and I can also ping individual vms within the DMZ.

Now I am preparing to set up a cluster between the two servers. So I have dedicated another NIC on each server for corosync. The corosync-NICs have static IPs (from the same sub net). They are connected via a physical switch. Cabling is okay.

But they can't ping each other via their respective corosync-IPs ("host is unreachable").

What am I missing?

Any ideas appreciated!

 

[Moayad]

Can you please share your network configuration cat /etc/network/interfaces?

 

[proxwolfe]

Can you please share your network configuration cat /etc/network/interfaces?

Hi,

I just got it to work a moment ago:

First, I hooked up my laptop to the switch and tried pinging both nodes and vice versa. This way, I figured out that it was only one of the nodes that created the problem. The other node I could ping from my laptop and it could ping my laptop back.

So in the problematic node I changed the physical NIC I was using (it has a couple) and with the other physical NIC it now works. I will need to conduct further tests to see whether the original NIC I used might be defective.

Thanks!