[PVE-User] I lost the cluster communication in a 10 nodes cluster

[Denis Morejon]

The 10 nodes lost the communication with each other. And they were 
working fine for a month. They all have version 5.1.


All nodes have the same date/time and show a status like this:

root at proxmox11:~# pvecm status

Quorum information
------------------
Date:             Fri Oct 12 11:55:59 2018
Quorum provider:  corosync_votequorum
Nodes:            1
Node ID:          0x00000007
Ring ID:          7/60372
Quorate:          No

Votequorum information
----------------------
Expected votes:   10
Highest expected: 10
Total votes:      1
Quorum:           6 Activity blocked
Flags:

Membership information
----------------------
     Nodeid      Votes Name
0x00000007          1 192.168.80.11 (local)