For more information regarding the security incident at F5, the actions we are taking to address it, and our ongoing efforts to protect our customers, click here.

Forum Discussion

starboy's avatar
starboy
Icon for Cirrus rankCirrus
Oct 16, 2017

Health Monitors

Hi everyone I have 2 ltm_https pool members. i used gateway_icmp health monitor for the pool and none for the nodes however the pool and virtual servers became available while the nodes are unknown e...
application delivery
BIG-IP
LTM
Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
Oct 16, 2017

Health monitors filter up from the node, to the pool to the vip. So if you do not have a monitor at the node level, their status will not be passed to the pool level monitor. This is why your VIP and pool are showing 'green'

 

Good practice is to enable ICMP monitoring at a node level and have a more specific monitor at the pool level - such as an HTTPS monitor.

 

If ICMP fails at the node level, it will filter up to the pool level monitor and mark it down, which in turn will mark down the VIP