Advanced DNS Synthetic Monitor
This guide provides instructions on how to create a DNS Synthetic Monitor leveraging many of the more advanced features. These parameters will help you to fine tune your monitors in order to get the most out of them.
Using the instructions provided in this document, you can create a DNS Synthetic Monitor to validate and alert on the health and performance of your DNS endpoints and records. This how-to will configure a
CNAME monitor but you may select any record type for your needs.
Configure a DNS Monitor
Step 1: Create a new DNS Monitor.
Log into the F5® Distributed Cloud Console.
Navigate to either the
Observabilityworkspace tile or menu.
Note: The homepage is role based, and your homepage may look different due to your role customization. Select
All Servicesdrop-down menu to discover all options.
Add DNS Monitor.
Step 2: Configure Metadata.
Step 3: Configure the monitor
Domainthat you would like to monitor.
Record Typeof the domain you would like to monitor.
Set the monitor frequency
Intervalfor how often you would like the monitor to run from each source region configured later in the form.
Adjust the protocol if you are not using UDP.
Step 4: Configure where to monitor from.
Note: Each source
regionadded will monitor the endpoint configured for the monitor. The combined health from all regions will generate the overall monitors
- In the
Add Itemto begin adding sources for the monitor.
Select the desired
Providerfor which you would like to source the monitor from.
Providerselected, click the
Regionsdropdown and select which
Regionyou would like the monitor run from.
Add Itemif you would like to add additional
Regionsfor the current
Applyto add the current
Regionsto the monitor.
Back in the primary
Add Itemand follow the steps above if you would like to add additional
Step 5: Configure how to monitor.
Note: Custom nameservers are optional and the monitor will use its default nameservers for validation by default. Each configured
Regionwill monitor each nameserver configured here.
Custom Name Serversto add a specific nameserver you would like checked by the monitor.
- Fill in the
Name ServerIP and
Portto match your desired DNS infrastructure. You can click
Add Itemagain if you require additional nameservers.
Query Timeoutto control how long the monitor waits for a response before becoming critical.
Number of consecutive test failuresto control how many failed monitors must happen in a row before becoming Critical.
Number of Nameserversto control if
ALLnameservers tested must pass to be considered Healthy.
Number of Failed Locationsto control how many regions must fail before the global monitor becomes Critical.
Save and Exitto save the new DNS Synthetic Monitor.
Step 6: Setup Alerting.
Synthetic Monitoringcan be configured similar to other F5® Distributed Cloud services following the Alerting how-to guide.
Optionally filter your
Alert Policyto only send notifications to the receiver based on alerts coming from
Synthetic Monitoringby either matching the
Synthetic-Monitorsor matching the