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Configuring the UDP jitter operation
CAUTION:
To ensure successful UDP jitter operations and avoid affecting existing services, do not perform the
operations on well-known ports from 1 to 1023.
Jitter means inter-packet delay variance. A UDP jitter operation measures unidirectional and
bidirectional jitters. You can verify whether the network can carry jitter-sensitive services such as
real-time voice and video services through the UDP jitter operation.
The UDP jitter operation works as follows:
1. The NQA client sends UDP packets to the destination port at a regular interval.
2. The destination device takes a time stamp to each packet that it receives, and then sends the
packet back to the NQA client.
3. Upon receiving the responses, the NQA client calculates the jitter according to the time stamps.
The UDP jitter operation requires both the NQA server and the NQA client. Before you perform the
UDP jitter operation, configure the UDP listening service on the NQA server. For more information
about UDP listening service configuration, see "Configuring the NQA server."
To configure a UDP jitter operation:
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create an NQA operation
and enter NQA operation
view.
nqa
entry
admin-name
operation-tag
By default, no NQA operation is
created.
3. Specify the UDP jitter type
and enter its view.
type udp-jitter
N/A
4. Specify the destination
address of UDP packets.
destination ip
ip-address
By default, no destination IP
address is specified.
The destination IP address must
be the same as the IP address of
the listening service on the NQA
server.
5. Specify the destination port
of UDP packets.
destination port
port-number
By default, no destination port
number is specified.
The destination port number must
be the same as the port number of
the listening service on the NQA
server.
6. (Optional.) Specify the
source port number of UDP
packets.
source port
port-number
By default, no source port number
is specified.
7. (Optional.) Specify the
payload size in each UDP
packet.
data-size
size The default setting is 100 bytes.
8. (Optional.) Specify the string
to be filled in the payload of
each UDP packet.
data-fill
string
The default payload fill string is
hexadecimal number
00010203040506070809.
9. (Optional.) Specify the
number of UDP packets sent
in one UDP jitter operation.
probe packet-number
packet-number
The default setting is 10.
10. (Optional.) Configure the
probe packet-interval
The default setting is 20
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