Hi, I don't understand your host layout.
Are you running a cluster as described in  or not? Does your environment match the requirements in the wiki? What do you mean "15 standalone nodes and cluster defined"? Are they running in a cluster or not? Also, are the hosts able to reach each other? Just because you can access them from your host, doesn't mean that they can talk to each other. Regards, harrim4n  https://pve.proxmox.com/wiki/Cluster_Manager On 04.06.20 15:07, Sivakumar SARAVANAN wrote: > Hello > > We are using the pve-manager/6.1-3/37248ce6 > There is no network issue, we are able to access the all host from the > putty session. But not from Datacenter. > > > Best regards, > > Sivakumar SARAVANAN > > > > On Thu, Jun 4, 2020 at 3:00 PM Eneko Lacunza <elacu...@binovo.es> wrote: > >> Hi, >> >> El 4/6/20 a las 14:52, Sivakumar SARAVANAN escribió: >>> Hello, >>> >>> We have a one Proxmox Datacenter and on top of that we have around 15 >>> standalone nodes and cluster defined. >>> >>> The Datacenter itself is showing "communication error " frequentially. >> All >>> standalone nodes are unavailable to perform any activities within >>> theProxmox Datacenter. >>> >>> Appreciating your support. >>> >> This is usually a network problem. What version of Proxmox (pveversion -v) >> >> >> Cheers >> Eneko >> >> -- >> Zuzendari Teknikoa / Director Técnico >> Binovo IT Human Project, S.L. >> Telf. 943569206 >> Astigarragako bidea 2, 2º izq. oficina 11; 20180 Oiartzun (Gipuzkoa) >> www.binovo.es >> >> _______________________________________________ >> pve-user mailing list >> email@example.com >> https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user >> _______________________________________________ pve-user mailing list firstname.lastname@example.org https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user