Configuring the WSM using Device Manager

UDP-based DNS health checking  

A UDP-based DNS health check is performed by sending a UDP-based query (for example, www.nortelnetworks.com), and watching for the server's reply. You can modify the domain name to be queried in the Health Check Content field. If you enable UDP-based DNS health checks, you can send TCP-based queries to one real server group and UDP-based queries to another real server group.

To configure UDP-based DNS health checks, see Configuring a health check for a real server group. Configure the fields in the following table.

Note: If no host name is configured, the health check is performed by sending a UDP-based query from a dummy host and watching for the server's reply. The reply, even though negative (for example, Server not found if from a dummy host), satisfies the health check.

See also:

• Script-based health checking
• Direct server return health checking
• ICMP health checking
• ARP health checking
• Link health checking
• TCP health checking
• Modifying the health check interval and retries
• Application health checking
• About health checking