H3C Technologies H3C S3100 Series Switches User Manual

Page 871

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Test parameter

Description

Number of probes per test
(count)

For tests except jitter test, only one test packet is sent in a probe. In a jitter test,
you can use the jitter-packetnum command to set the number of packets to be
sent in a probe.

Packet size (datasize)

For ICMP/UDP/jitter test, you can configure the size of test packets.

For ICMP test, the ICMP packet size refers to the length of ECHO-REQUEST
packets (excluding IP and ICMP headers)

Padding string for the test
packet (datafill)

In ICMP, UDP and jitter tests, the system should stuff the data field of each
transmitted ICMP message. The stuffing character string ranges from 1 to 230
characters, including spaces.

If the size of a test datagram is smaller than that of the configured stuffing
character string, only a portion of the string will be used for stuffing. If the size of
the test datagram is larger, the string will be used cyclically for stuffing. Suppose
a stuffing string, “abcde”, is configured. If the test datagram size is 3, only “abc”
will be used for stuffing; if it is 8, the string “abcdeabc" will be used.

Routing table
bypass(

sendpacket

passroute

)

With routing table bypass, a remote host can bypass the normal routing tables
and send ICMP packets directly to a host on an attached network. If the host is
not on a directly-attached network, an error is returned. You can use this function
when pinging a local host on an VLAN interface that has no route defined.

TTL of HWPing test packets
(ttl)

It is equal to the argument “-h” in a ping command.

Maximum number of history
records that can be saved
(history-records)

This parameter is used to specify the maximum number of history records that
can be saved in a test group. When the number of saved history records exceeds
the maximum number, HWPing discards some earliest records.

Automatic test interval
(frequency)

This parameter is used to set the interval at which the HWPing client periodically
performs the same test automatically.

Probe timeout time
(timeout)

The probe timeout timer is started after the HWPing client sends out a test
packet.

This parameter is in seconds.

Type of service (tos)

Type of service is the value of the ToS field in IP header in the test packets.

dns

This parameter is used to specify a DNS domain name in an HWPing DNS test
group.

dns-server

This parameter is used to set the DNS server IP address in an HWPing DNS test
group.

HTTP operation type
(http-operation)

This parameter is used to set the type of HTTP interaction operation between
HWPing client and HTTP server.

FTP operation type
(ftp-operation)

This parameter is used to set the type of FTP interaction operation between
HWPing client and FTP server.

FTP login username and
password (username and
password)

The two parameters are used to set the username and password to be used for
FTP operation.

File name for FTP operation
(filename)

Name of a file to be transferred between HWPing client and FTP server

Size of a file to be uploaded
in an FTP test(filesize)

Size of a file to be uploaded in an FTP test

Number of jitter test packets
to be sent per probe
(jitter-packetnum)

Jitter test is used to collect statistics about delay jitter in UDP packet
transmission

In a jitter probe, the HWPing client sends a series of packets to the HWPing
server at regular intervals (you can set the interval). Once receiving such a
packet, the HWPing server marks it with a timestamp, and then sends it back
to the HWPing client. Upon receiving a packet returned, the HWPing client
computes the delay jitter time. The HWPing client collects delay jitter
statistics on all the packets returned in the test. So, the more packets a jitter
probe sends, the more accurate the jitter statistics is, but the longer time the
jitter test costs.

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