Creating ICMP Health Checks

An ICMP monitor sends an ICMP or ICMPv6 echo request to the IP address of the target server and expects an ICMP/ICMPv6 echo response. The ICMP monitor determines the health of a server by monitoring the response to an ICMP ping.

Complete the following steps to create an ICMP Health Check monitor:

1. Go to Configure > Networking > DNS > DTC > DTC Health Checks.

2. Click Create DTC Health Check > ICMP.

3. Configure the following in the ICMP Health Check dialog:

   • Name: Enter a name for the ICMP health monitor.

   • Description: Enter a description for the health monitor.

   • Interval (seconds): Enter the interval value in seconds. The health monitor runs only for the specified interval and it is measured from the begining of the previous monitor cycle. The default value is 15.

   • Timeout (seconds): Enter the timeout value in seconds. The monitor waits for the number of seconds that you specify after sending a request. If the monitor does not receive a response within the number of seconds that you specify, then it considers this check as failed. The monitor discards any response it receives after the timeout. The default value is 10.

   • Retries for Healthy Status: Enter an integer value. This value determines how many valid responses or good health checks in a row must be received by the monitor from the DTC server.

   • Retries for Down Status: Enter an integer value. It is the opposite of the Retries for Healthy Status count. This value determines how many unhealthy status health checks (server is unavailable) in a row must be collected by the monitor from the DTC server.

4. Click Save & Close.