3Com S7906E - Switch, Configuration Manual

Page: 2502 / 2621

1-11
To do… Use the command… Remarks
Configure the operation type operation { get | post }
Optional
By default, the operation type
for the HTTP is
get , that is,
obtaining data from the HTTP
server.
Configure the website that an
HTTP test visits
url url Required
Configure the HTTP version
used in the HTTP test
http-version v1.0
Optional
By default, HTTP 1.0 is used in
an HTTP test.
Configure common optional
parameters
Refer to Configuring Optional
Parameters Common to an
NQA Test Group Optional
The TCP port number for the HTTP server must be 80 in an HTTP test. Otherwise, the test will fail.
Configuring a UDP Jitter Test
It is recommended not to perform an NQA UDP jitter test on known ports, namely, ports from 1 to 1023.
Otherwise, the NQA test will fail or the corresponding services of this port will be unavailable.
Real-time services such as voice and video have high requirements on delay jitters. With the UDP jitter
test, uni/bi-directional delay jitters can be obtained to judge whether a network can carry real-time
services.
Delay jitter refers to the difference between the interval of receiving two packets consecutively and the
interval of sending these two packets. The procedure of a UDP jitter test is as follows:
z
The source sends packets at regular intervals to the destination port.
z
The destination affixes a time stamp to each packet that it receives and then sends it back to the
source.
z
Upon receiving the packet, the source calculates the delay jitter, and the network status can be
analyzed.
Configuration prerequisites
A UDP jitter test requires cooperation between the NQA server and the NQA client. Before the UDP jitter
test, make sure that the UDP listening function is configured on the NQA server. For the configuration of
the UDP listening function, refer to Configuring the NQA Server .