MENU
A node is a member of various pools and hosts different web applications. If a web application is unavailable, the BIG-IP appliance needs to mark the pool member down for that application pool. What should a BIG-IP Administrator deploy at the pool level to accomplish this?
Comprehensive and Detailed Explanation From BIG-IP Administration Control Plane Admi13nistration documents:
To accurately report the current status of specific web applications hosted on the same server (node), the Control Plane must use a monitor that operates at the application layer.
Application-Specific Monitoring: While a node (the IP address) might be up and responding to ICMP (ping) or TCP handshakes, a specific web service or path on that server could be failing.
Custom Send Strings: An HTTP monitor allows the administrator to define a 'Send String' to request a specific page or URI related to the application in that pool .
Receive Strings: The 'Receive String' identifies a unique value that the application must return to be considered 'Available' .
Granular Status Reporting: By deploying these monitors at the pool level, the Control Plane can mark a pool member 'Offline' for one application pool if the receive string is missing, while keeping it 'Available' in another pool where the service is still healthy.
Currently there are no comments in this discussion, be the first to comment!