16
Predefined user roles
network-admin
Parameters
string: Specifies a case-sensitive string of 1 to 200 characters.
Usage guidelines
If the payload length is smaller than the string length, only the first part of the string is filled. For
example, if you configure the string as abcd and set the payload size to 3 bytes, abc is filled.
If the payload length is greater than the string length, the system fills the payload with the string
cyclically until the payload is full. For example, if you configure the string as abcd and the payload
size as 6 bytes, abcdab is filled.
How the string is filled depends on the operation type.
• For the ICMP echo operation, the string fills the whole payload of an ICMP echo request.
• For the UDP echo operation, the first five bytes of the payload of a UDP packet are for special
purpose. The string fills the remaining part of payload.
• For the UDP jitter operation, the first 68 bytes of the payload of a UDP packet are for special
purpose. The string fills the remaining part of the payload.
• For the voice operation, the first 16 bytes of the payload of a UDP packet are for special
purpose. The string fills the remaining part of the payload.
• For the path jitter operation, the first four bytes of the payload of an ICMP echo request are for
special purpose. The string fills the remaining part of payload.
Examples
# Specify abcd as the payload fill string for ICMP echo requests.
<Sysname> system-view
[Sysname] nqa entry admin test
[Sysname-nqa-admin-test] type icmp-echo
[Sysname-nqa-admin-test-icmp-echo] data-fill abcd
data-size
Use data-size to set the payload size for each probe packet.
Use undo data-size to restore the default.
Syntax
data-size size
undo data-size
Default
The default payload size of a probe packet for different operations is described in Tab le 5.
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