fir3net
PPS-Firenetbanner-780.5x190-30-03-17

ADX - What is the order of priority for healthchecks ?

Background

The Brocade ADX offers 3 main types of layer 7 healthchecks. These are,

  • Server Healthcheck - Server healthchecks are configured on the real server itself. Once configured it issues a healtcheck to the real server based on the port/protocol configured.
  • Port-Policy - A port-policy is a policy that contains all of your parameters for your healtcheck. Your port-policy can then be assigned to a single or multiple real/virtual server(s).
  • Healthcheck Elements - A healthcheck element is a policy that contains all of your parameters for your healthcheck. This is then assigned to a single or multiple real server(s). Healtcheck elements can also use boolean based expressions (i.e AND, OR etc) againest multiple healthcheck elements.

Based on the above, there are instances were you may have multiple healthchecks types configured across your real and virtual servers.

Priorities

Below shows which healthcheck will be used across the different healthcheck configuration scenario's.

HEALTHCHECKS CONFIGURED
HEALTHCHECK USED HEALTHCHECK RS
PORT POLICY VS
PORT POLICY RS  ELEMENT HEALTHCHECK RS
Healthcheck Real Server  x      
Port Policy Virtual Server  x  x    
Port Policy Real Server  x  x  x  
Port Policy Real Server  x    x  
Element Healthcheck Real Server  x  x    x
Element Healthcheck Real Server  x      x

 *RS = RealServer / VS = Virtual Server

 

About the Author

RDonato

R Donato

Rick Donato is the Founder and Chief Editor of Fir3net.com. He currently works as a Principal Network Security Engineer and has a keen interest in automation and the cloud.

You can find Rick on Twitter @f3lix001