[rhos-list] EXTERNAL: Re: Questions about Quantum.

[Perry Myers]

On 05/09/2013 04:06 PM, Minton, Rich wrote:
> Just wanted to let you know we found our problem. We were using pings to
> check network connectivity and the ICMP packets were being rejected by a
> rule in iptables on our compute nodes. Our controller/compute node did
> not have this rule so everything functioned properly on that node. Once
> I removed the REJECT rule all pings returned replies.  Just goes to show
> you… don’t always use ping to test network connectivity. If we had tried
> to ssh to another VM on another host it probably would have worked fine.

Thanks for the info :)

Would this have been fixed by adding icmp to your security group
configuration?  (i.e. did you have port 22 open to your guests but not
icmp?)