13
Configuring the ICMP jitter operation
The ICMP jitter operation measures unidirectional and bidirectional jitters. The operation result helps
you to determine whether the network can carry jitter-sensitive services such as real-time voice and
video services.
The ICMP jitter operation works as follows:
1.
The NQA client sends ICMP packets to the destination device.
2.
The destination device time stamps each packet 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 timestamps.
To configure the ICMP 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 operations
exist.
3.
Specify the ICMP jitter type
and enter its view.
type icmp-jitter
N/A
4.
Specify the destination
address of ICMP packets.
destination ip
ip-address
By default, no destination IP
address is specified.
5.
(Optional.) Set the number of
ICMP packets sent in one
ICMP jitter operation.
probe packet-number
packet-number
The default setting is 10.
6.
(Optional.) Set the interval
for sending ICMP packets.
probe packet-interval interval
The default setting is 20
milliseconds.
7.
(Optional.) Specify how long
the NQA client waits for a
response from the server
before it regards the
response times out.
probe packet-timeout
timeout
The default setting is 3000
milliseconds.
8.
(Optional.) Specify the
source IP address for ICMP
packets.
source ip ip-address
By default, the packets take the
primary IP address of the output
interface as their source IP
address.
The source IP address must be
the IP address of a local interface,
and the interface must be up.
Otherwise, no ICMP packets can
be sent out.
NOTE:
Use the
display nqa result
or
display nqa statistics
command to verify the ICMP jitter operation.
The
display nqa history
command does not display the ICMP jitter operation results or statistics.
Configuring the DHCP operation
The DHCP operation measures whether or not the DHCP server can respond to client requests.
DHCP also measures the amount of time it takes the NQA client to obtain an IP address from a
DHCP server.
