H3C Technologies H3C Intelligent Management Center - Manual (Page 525)

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DNS service
Domain Name System (DNS) is a core Internet service. With DNS, users can use easy-to-remember
domain names to access websites. The DNS service can automatically translate the domain names you
specified into IP addresses. The default DNS service ports are TCP 53 and UDP 53.
APM monitors the DNS service status by requesting the DNS service to translate a specific domain name
into an IP address. This section describes how to add and modify a DNS monitor, and helps view the
monitor report.
Adding a DNS service application monitor
APM monitors DNS status through DNS service ports TCP/UDP 53. Before adding the application
monitor for DNS service, complete the following tasks:
• Add the target host to the IMC platform. For information about adding a host to the IMC platform,
see H3C IMC Base Platform Administrator Guide.
• To view traffic statistics in the monitor report of the DNS application, make sure at least one probe
is configured in APM. After a DNS service application monitor is added, APM sends the IP address
of the monitored DNS application to the probes for traffic collection.
To add a DNS service application monitor:
1. Click the Resource tab.
2. Enter the Add Application page in one of the following ways:
{
Select Application Manager > Add Application from the navigation tree.
The page displays all application types that can be monitored by APM.
{
Select Application Manager > Application Monitor from the navigation tree, and click Add on
the application monitor list page.
3. Click DNS Monitor of the Service Monitor class.
The page for adding a DNS service application monitor appears.
4. Configure the following parameters:
{
IP Address—Enter the IP address of the host on which the DNS service application to be
monitored is installed. If the host is already added to the IMC platform, you can also click Select
and select the host in the Select Devices window. For information about selecting a host, see " 2
Quick start ." APM automatically checks the specified IP address and associates the application
monitor with the host managed in the IMC platform.
{
Name—Enter a unique application monitor name. H3C recommends using Application
name_host IP address for naming the application monitor.
{
Description—Enter a description for the application monitor.
{
Traffic Collection Port—Enter the DNS service port. The default value is 53, including TCP 53
and UDP 53. This field appears only when at least one probe is configured for APM.
{
Polling Interval (min)—Select a polling interval for the application monitor. Available options
include 1, 2, 3, 4, 5, 10, 20, and 30. The default polling interval is 5 minutes. A shorter polling
interval provides more accurate real-time data but consumes more system resources.
{
Host—Enter the domain name of a website for DNS monitoring. For example, enter
www.hp.com.