Multicast usage in proxmox

[Andrew Hart]

Hi,
I have installed a 16 node proxmox 5.1 cluster with a ceph hdd osd on each node, 5 monitor/mgrs, 2Gbit network. During installation I wasn't able to get multicast networking on the network switch.
Everything seems to work so I am wondering what problems I should look out for. Is multicast really needed?
Is there anything in the web interface that would show multicast status?
Andrew

 

[tom]

See also

https://pve.proxmox.com/wiki/Multicast_notes

 

[Andrew Hart]

I read through that and established that multicast isn't working, but still everything seems fine without it. So that's why the question. I did find one thing wrong and that was that "ceph versions" is inconsistent and "ceph osd status" seems not work properly (hostname missing in some rows) but that's ceph not proxmox.

 

[Andrew Hart]

I finally found that I had completely misunderstood the omping program. The command has to be run separately on all the nodes. I just ran it on one node with all the nodes listed in the command line and thought it would handle it all itself.