DNS Health Check and Associated Billing
Objective
This document outlines DNS health check and associate billing in F5® Distributed Cloud and how to access them.
Reminder about DNS Load Balancer Health Checks
A DNS Load Balancer (DNSLB) Health Check enables verification that a DNSLB Pool endpoint member is healthy and available. If the member Is unhealthy or unavailable, the endpoint will be removed from the possible DNSLB answers.
- ICMP
- HTTP
- HTTPS
- TCP
- UDP
DNSLB Health Checks will also use a port to reach the target endpoint - often port 80 (HTTP) or 443 (HTTPS).
DNS Management>Manage>DNS Load Balancer Management>DNS Load Balancer Health Checks.
Note: To edit existing DNSLB select
...inActions, selectManage Configuration, selectEdit Configuration.
Figure: DNSLB Health Check Form
Billing
Health Check is only composed of a Type (HTTP, ICMP, etc.) and possibly a Port (when not using ICMP), it can be used in multiple pools.
When used in multiple pools, this health check will be billed accordingly.
Figure: DNSLB Health Check
Figure: DNSLB Health Check
Note: It is also possible to see which DNSLB Pools a Health Check is attached to. Select
DNS Management>Manage>DNS Load Balancer Management page.
Figure: DNSLB Health Check
Note: When there are more than two active Health Checks, you can expand the list by clicking on
See All.
Figure: DNSLB Health Check