Janu
ary 201
9
418 Legrand PDU User Guide
Querying DNS Servers
This command syntax queries Internet domain name server (DNS) information of a network host.
diag>
nslookup <host>
Variables:
<host> is the name or IP address of the host whose DNS information you want to query.
Showing Network Connections
This command syntax displays network connections and/or status of ports.
diag>
netstat <option>
Variables:
<option> is one of the options:
ports
or
connections
.
Option
Description
ports
Shows TCP/UDP ports.
connections Shows
network
connections.
Testing the Network Connectivity
This ping command sends the ICMP ECHO_REQUEST message to a network host for checking its network
connectivity. If the output shows the host is responding properly, the network connectivity is good. If not,
either the host is shut down or it is not being properly connected to the network.
diag>
ping <host>
Variables:
<host> is the host name or IP address whose networking connectivity you want to check.
Options:
You can include any or all of additional options listed below in the ping command.
Options
Description
count <number1>
Determines the number of messages to be
sent. <number1> is an integer number
between 1 and 100.
size <number2>
Determines the packet size. <number2> is
an integer number in bytes between 1 and
65468.
timeout <number3> Determines the waiting period before
timeout. <number3> is an integer number in
seconds ranging from 1 to 600.
