Digitalchina Networks DCS-3950 series User Manual

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DCS-3950 series Ethernet switch manual
Function: Shut down the specified Ethernet port; the ‘no shutdown’ command opens the
port.
Command mode: Interface Mode .
Default: Ethernet port is open by default.
Usage Guide: When Ethernet port is shut down, no data frames are sent in the port, and
the port status displayed when the user types the ‘show interface’ command is ‘down’.
Example: Open ports 0/0/1-8.
Switch(Config)#interface ethernet 0/0/1-8
Switch(Config-Port-Range)#no shutdown
7.2.1.2.11 virtual-cable-test
Command: virtual-cable-test
Function: Test the physical connection of ethernet cable. Much information can be
displayed by this command, including well for working well, short for short circuit, open for
open circuit, mismatch for mismatch of impedance, and fail for testing failure. If any
information is abnormal, then locations of the failure will be reported.
Command mode: Port Mode.
Default: Physical connection testing is disabled by default.
Usage Guide: For twisted-pair connections, RJ-45 connectors must be complied with
IEEE 802.3 standards, or the line pair displayed will not be constant with the physical ones.
For fast ethernet ports, only pairs of (1, 2) and (3, 6) will be used. The result will effect for
only these two pairs. If gigabit ethernet is connected to a fast ethernet port, (4, 5) and (7, 8)
will not be effect for the result. The result will vary according to the type of the twisted-pair
lines, the environment temperature, and the working voltage. If the environment
temperature is 20 Celsius degress, and the voltaqe keeps contan, the twisted-pair is
limited to 100m. And +/-2 of error is allowed. To be mentioned, when the interface is to be
tested, all the data connections over the specified interface will be interrupted. And it will
recover to initialized after 5~10 seconds.
Standard EIA/TIA 568A: (1Green/White,2Green). (3Orange/White,6Orange),
(4Blue,5Blue/Write), (7Brown/Write,Brown).
Standard EIA/TIA 568B: (1Orange/White,2Orange), (3Green/White,6Green).
(4Blue,5Blue/Write), (7Brown/Write,Brown).
Example: Test the twisted-pair connection of gigabit ethernet port 0/0/25.
Switch(Config)#interface ethernet 0/0/25
Switch(Config-Ethernet0/0/25)#virtual-cable-test
Interface Ethernet0/0/25:
--------------------------------------------------------------------------
Cable pairs Cable status Error lenth (meters)
--------------- ----------------- --------------------------
(1, 2) open 5
(3, 6) open 5
(4, 5) open 5
(7, 8) short 5

Digitalchina Networks DCS-3950 series Specifications

General

Brand	Digitalchina Networks
Model	DCS-3950 series
Category	Network Router
Language	English