Subnetting, A Primer - Extron electronics DXP DVI User Manual

Dvi, dvi pro, and hdmi series digital matrix switchers
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Setting carriage return-line feed
Unless commanded otherwise, Telnet transmits a line feed character only (no carriage
return) to the connected switcher when you press the <Enter> key. This is the correct
setting for SIS communication with the switcher. The Telnet
Telnet to transmit carriage return and line feed characters when <Enter> is pressed;
however, if
Closing the link to the switcher
To close the link to the switcher, access the
sequence (<Ctrl +
Help
For Telnet command definitions, enter
Exiting Telnet (Quit command)
Exit the Telnet utility by entering
DXP switcher, access the Telnet prompt by entering the Escape sequence (<Ctrl +

Subnetting, a Primer

A subnet is a subset of a network — a set of IP devices that have portions of their IP
addresses in common. It is not the purpose of this manual to describe TCP/IP protocol
in detail. However, some understanding of TCP/IP subnetting is necessary in order
to understand the interaction of the DXP switcher and the mail server gateway. To
understand subnetting at the level required to install and operate the DXP switcher, you
must understand the concepts of a gateway, local and remote devices, IP addresses and
octets, and subnet masks and octets.
Gateways
The DXP switcher can communicate with the e-mail server that it uses for e-mail
notification directly (if they are on the same subnet), or the communication can be routed
via a gateway (a computer that provides a link between different subnets).
Local and remote devices
The local and remote devices are defined from the point of view of the function being
described. In this guide, subnetting is an issue when you are using the controlling
computer to set TCP/IP and e-mail values in the DXP switcher (see
page 79 and
variables for e-mail notification, the matrix switcher is the local device and the e-mail
server is the remote device.
IP addresses and octets
Valid IP addresses consist of four 1-, 2-, or 3-digit numeric sub-fields, called "octets,"
which are separated by dots (periods) (figure 121). Each octet can be numbered from 000
through 255. Leading zeros, up to three digits total per octet, are optional. Values of 256
and above are invalid.
Typical IP Address:
Figure 121.
is set, the SIS link with the switcher does not function properly.
crlf
] >
). At the
prompt, enter
Telnet
at the Telnet prompt. If you are connected to the
quit
"Email Settings
Page" on page 113). When you are setting up the
192.168.254.254
Octets
IP Address and Octets
DXP DVI, DXP DVI Pro, and DXP HDMI Series • Reference Information
set crlf
prompt by entering the escape
Telnet
.
close
at the Telnet prompt.
?
command forces
]
>).
"IP
Setup" on
129
129

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