metrotek Bercut-MMT, Operation Manual

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44 TCP/IP: Basic Testing
6.1 Ping
The ping tool (echo testing) is used to check a certain address reachability
within or outside the subnetwork. The program sends requests to a certain
network node and detects replies received. This procedure is based on IP and
ICMP datagrams transmission protocols and allows to determine transmission
links and intermediate devices availability [2].
Prior to start of testing, node name or IP address should be entered in
the Destination field, for device that should be checked/reached (refer to
Figure 6.2).
Figure 6.2. Ping Parameters Configuration
The Number of ping field is used to configure the required quantity
of ICMP protocol requests. For more accuracy, more requests should be
configured. The minimal value sufficient to check the connection is
1 . If
this field is left blank, testing will be performed until Stop button or F6
functional key is pressed.
Test execution starts on pressing the Start button or F6 functional key.
Ping statistics displayed under information table provides data about
amount of transmitted, received packets and percent of lost packets. The last
row presents RTT measurement results (RTT stands for Round-Trip Time, a
time between sending request and receiving reply, it represents two-way delays
over route): Minimum/average/maximum values in milliseconds.
Bercut-MMT: Ethernet Networks Analysis