Configuring a DHCP Test

DHCP tests check whether DHCP servers can respond to DHCP requests from clients and compute the time spent on allocating IP addresses to the clients.

Procedure

Access the system view.
system-view
Create an NQA test instance and access the test instance view.
nqa test-instance admin-name test-name
Set the test type to DHCP.
test-type dhcp
Set the source interface through which DHCP request packets are sent.
source-interface interface-type interface-number

Optional: Configure other DHCP test parameters as required.

Item	Command	Description
Configuring description of a test instance	description description-information	-
Setting the number of probes for a single test (a probe refers to the application of one IP address using DHCP)	probe-count number	By default, one test initiates three probes.
Setting the test interval	frequency interval	By default, no test interval is set, and the test runs only once.
Setting the probe failure percentage	fail-percent percent	The default probe failure percentage is 100%. That is, the test is considered failed only when all probes fail.
Setting the timeout for a single probe	timeout time	By default, a DHCP probe times out in 3s.
Setting the maximum number of historical records	records history number	By default, there are a maximum of 50 historical records.
Setting the maximum number of test result records	records result number	By default, a maximum of 5 test results can be recorded.
Setting the aging time of a test instance	agetime hh:mm:ss	The default value is 0. That is, test instances are never aged.

Start the NQA test.
start
Select one of the following start modes as required.
- Start the NQA test immediately.
  
  start now [ end { at [ yyyy/mm/dd ] hh:mm:ss | delay { seconds second | hh:mm:ss } | lifetime { seconds second | hh:mm:ss } ]
- Start the NQA test at a specified time point.
  
  start at [ yyyy/mm/dd ] hh:mm:ss [ end { at [ yyyy/mm/dd ] hh:mm:ss | delay { seconds second | hh:mm:ss } | lifetime { seconds second | hh:mm:ss } ]
- Start the NQA test after the delay of a specified period.
  
  start delay { seconds second | hh:mm:ss } [ end { at [ yyyy/mm/dd ] hh:mm:ss | delay { seconds second | hh:mm:ss } | lifetime { seconds second | hh:mm:ss } ]

Follow-up Procedure

Run the display nqa results command to view the test results.

<FW> display nqa results
 NQA entry(admin, dhcp) :testflag is inactive ,testtype is dhcp 
  1 . Test 1 result   The test is finished
   Send operation times: 3              Receive response times: 3          
   Completion:success                   RTD OverThresholds number: 0       
   Attempts number:1                    Drop operation number:0            
   Disconnect operation number:0        Operation timeout number:0         
   System busy operation number:0       Connection fail number:0           
   Operation sequence errors number:0   RTT Status errors number:0         
   Destination ip address:192.168.0.1                                    
   Min/Max/Average Completion Time: 996/999/997                          
   Sum/Square-Sum Completion Time: 2992/2984026                         
   Last Good Probe Time: 2016-01-20 18:21:42.5                           
   Lost packet ratio: 0 %

**Table 1** Description of the **display nqa results** command output
Item	Description
Send operation times	Number of sent test packets
Receive response times	Number of received response packets
Completion	Test completion state: success: The test is successful. no result: The test is running, and no result has been obtained. failed: The test fails.
RTD OverThresholds number	Number of times the RTD exceeds the specified threshold
Attempts number	Number of tests
Drop operation number	Number of test packet sending failures
Disconnect operation number	Number of times the peer tears down the connection
Operation timeout number	Number of expiration times in the test
System busy operation number	Number of initialization or resource application failures
Connection fail number	Number of connection establishment failures
Operation sequence errors number	Number of received out-of-order packets
RTT Stats errors number	Number of RTT measurement failures
Destination ip address	IP address allocated by the DHCP server to the NQA client
Min/Max/Average Completion Time	Minimum, maximum, and average test completion periods
Sum/Square-Sum Completion Time	Sum and quadratic sum of completion periods
Last Good Probe Time	Time the last probe was complete
Lost packet ratio	Packet loss ratio