DNS operation configuration example

As shown in Figure 10, configure a DNS operation to test whether Device A can perform address resolution through the DNS server and test the resolution time.

# Assign IP addresses to interfaces, as shown in Figure 10. (Details not shown.)

# Configure static routes or a routing protocol to make sure the devices can reach each other. (Details not shown.)

# Create a DNS operation.

<DeviceA> system-view
[DeviceA] nqa entry admin test1
[DeviceA-nqa-admin-test1] type dns

# Specify the IP address of the DNS server 10.2.2.2 as the destination address.

[DeviceA-nqa-admin-test1-dns] destination ip 10.2.2.2

# Specify host.com as the domain name to be translated.

[DeviceA-nqa-admin-test1-dns] resolve-target host.com

# Enable the saving of history records.

[DeviceA-nqa-admin-test1-dns] history-record enable
[DeviceA-nqa-admin-test1-dns] quit

# Start the DNS operation.

[DeviceA] nqa schedule admin test1 start-time now lifetime forever

# After the DNS operation runs for a period of time, stop the operation.

[DeviceA] undo nqa schedule admin test1

# Display the most recent result of the DNS operation.

[DeviceA] display nqa result admin test1
NQA entry (admin admin, tag test1) test results:
    Send operation times: 1              Receive response times: 1
    Min/Max/Average round trip time: 62/62/62
    Square-Sum of round trip time: 3844
    Last succeeded probe time: 2011-11-10 10:49:37.3
  Extended results:
    Packet loss ratio: 0%
    Failures due to timeout: 0
    Failures due to internal error: 0
    Failures due to other errors: 0

# Display the history records of the DNS operation.

[DeviceA] display nqa history admin test1
NQA entry (admin admin, tag test) history records:
  Index      Response     Status           Time
  1          62           Succeeded        2011-11-10 10:49:37.3

The output shows that it took Device A 62 milliseconds to translate domain name host.com into an IP address.