All, While getting ganglia 2.2.1 going on a cluster I noticed gmond -h stated:
-i, --mcast_if set the interface gmond is to multicast on default: first interface e.g. "eth0" this however does not appear to be the case; as the multicast was going out eth1. So I was only seeing the master node in the php-rrd-client. As soon as I used: gmond -i eth0 all the nodes in the cluster were viewable through the php-rrd-client. I've yet to get around to hacking the gmond source; but figured I'd first mail the list to see if others have seen eth0 not being used as the default multicast interface. Thanks, Mike