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 ... in Actions, select Manage Configuration, select Edit Configuration.

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.

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.

Note: When there are more than two active Health Checks, you can expand the list by clicking on See All.