I've got two servers which are high-availability, managed by Heartbeat. As such, there is 1 public and 1 private IP address that they both share; the active box assumes those two IP's when it is called into action. The private interface on each of these boxes, according to ifconfig on each, are 10.0.0.11 and 10.0.0.12. However, the private IP managed by Heartbeat which references the active box is 10.0.0.1 (also known as shared-priv.domain.com). I'd like to get statistics on that shared private IP interface; the problem is, every time the idle box swaps with the active box, the MAC address obviously changes, as does the information represented in an 'ifconfig' on the active box. It seems that Cacti uses the information contained in the ifconfig output to determine what the 'inet addr:' is, but is there a way to tell it to simply use the 10.0.0.1 address for all of it's SNMP calls? I've tried putting shared-priv.domain.com as the FQDN when adding the host, but it still gets the inet addr for the private interface from the ifconfig output. Maybe this is just something that isn't possible with Cacti?