topic Re: What happens when health check node restarts? in Network Access Control

What happens when health check node restarts?

dgaikwad — Fri, 29 Jul 2022 14:45:14 GMT

Hi Experts,
There is a plan to restart one of the ISE nodes, which turns out to be the health check nodes for primary PAN failover.
Would rebooting this health check node, affect the monitoring for PAN node or would PAN be deemed as down and secondary being promoted to primary? (There is another health check node for secondary PAN as well).
Or there would be no effect on the monitoring of the PANs in this scenario?

Any pointers?

Re: What happens when health check node restarts?

Marcelo Morais — Fri, 29 Jul 2022 20:52:12 GMT

Hi @dgaikwad ,

no effect !!!

Remember that promote the SPAN to PPAN (via Automatic Failover) requires a Non-Administration Secondary Node, called a Health Check Node. This Node checks the health of PPAN. If the health detects that the PPAN is down or unreachable, the Health Check Node initiates the promotion of the SPAN to take over the Primary Role. To deploy the Automatic Failover feature, you MUST have at least three Nodes, where two of the Nodes assume the Administration Persona, and one Node acts as the Health Check Node. A Health Check Node is a Non-Administration Node and can be a PSN, MnT or pxGrid Node, or a combination of these (the recommendation is to use a PSN). If the PANs are in different Data Centers, you MUST have a Health Check Node for each PAN (called the Active Health Check Node and the Passive Health Check Node for Primary and Secondary PAN respectively).

Hope this helps !!!

Re: What happens when health check node restarts?

dgaikwad — Mon, 01 Aug 2022 09:15:25 GMT

Thank you for the confirmation. It clears up a lot of things.