Configuring A Voice Operation - HP MSR Series Configuration Manual

Step
5. Configure the destination port
of UDP packets.
6. Configure Payload size in
each UDP packet.
7. Configure the string to be
filled in the payload of each
UDP packet.
8. Specify the source port of UDP
packets.
9. Configure the source IP
address of UDP packets.

Configuring a voice operation

CAUTION:
Do not perform a voice operation to a well-known port from 1 to 1023. Otherwise, the NQA operation
might fail or the service on that port becomes unavailable.
A voice operation measures voice over IP (VoIP) network performance.
A voice operation works as follows:
1. The NQA client sends voice packets of G.711 A-law, G.711 μ-law or G.729 A-law codec type at
a specific interval to the destination device (NQA server).
2. The destination device takes a time stamp to each voice packet it receives and sends it back to the
source.
3. Upon receiving the packet, the source device calculates the jitter and one-way delay based on the
time stamp.
The following parameters that reflect VoIP network performance can be calculated by using the metrics
gathered by the voice operation:
Calculated Planning Impairment Factor (ICPIF)—Measures impairment to voice quality in a VoIP
•
network. It is decided by packet loss and delay. A higher value represents a lower service quality.
Mean Opinion Scores (MOS)—A MOS value can be evaluated by using the ICPIF value, in the
•
range of 1 to 5. A higher value represents a higher service quality.
Command
destination port port-number
data-size size
data-fill string
source port port-number
source ip ip-address
113
Remarks
By default, no destination port
number is configured.
The destination port number must
be the same as that of the listening
service on the NQA server.
Optional.
100 bytes by default.
Optional.
By default, the string is the
hexadecimal number
00010203040506070809.
Optional.
By default, no source port number
is specified.
Optional.
By default, no source IP address is
specified.
The source IP address must be that
of an interface on the device and
the interface must be up.
Otherwise, no UDP packets can be
sent out.