Ethernet Port Configuration Example - 3Com 4200G 12-Port Configuration Manual

Enabling the System to
Test Connected Cable
Displaying and
Debugging Ethernet
Port
Ethernet Port
Configuration
Example
Table 55 Configure the Ethernet port to run loopback test
Configure the Ethernet port to run
loopback test
After you use the shutdown command on a port, the port cannot run loopback test.
You cannot use the speed, duplex, mdi and shutdown commands on the ports
running loopback test. Some ports do not support loopback test, and corresponding
prompts will be given when you perform loopback test on them.
You can enable the system to test the cable connected to a specific port. The test
result will be returned in five minutes. The system can test these attributes of the
cable: Receive and transmit directions (RX and TX), short circuit/open circuit or not,
the length of the faulty cable.
Table 56 Enable the system to test connected cables
Operation
Enter system view
Enter Ethernet port view
Enable the system to test
connected cables
The virtual-cable-test command is not available on combo ports.
After the above configuration, enter the display commands in any view to display
the running of the Ethernet port configuration, and thus verify your configuration.
Enter the reset counters command in user view to clear the statistics of the port.
Table 57 Display and debug Ethernet port
Operation
Display port configuration
information
Display port loopback
detection state
Display brief configuration
information about one or
all ports
Display current
type-specific ports
Clear the statistics of the
port
Network requirements
Switch A is connected to Switch B through trunk port GigabitEthernet1/0/1.
■
Configure the default VLAN ID for the trunk port as 100.
■
Allow the packets of VLAN 2, VLAN 6 through VLAN 50 and VLAN 100 to pass the
■
port.

Ethernet Port Configuration Example

loopback { external | internal }
Command
system-view
interface interface-type interface-number
virtual-cable-test
Command
display interface [ interface-type |
interface-type interface-number ]
display loopback-detection
display brief interface [ interface-type
interface-number ] [ | { begin | include |
exclude } string ]
display port { hybrid | trunk | combo |
vlan-vpn }
reset counters interface [
interface-type | interface-type
interface-number ]
73
Optional
Remarks
—
—
Required
Remarks
You can use the
commands in any view.
After 802.1X is enabled,
the port information
cannot be reset.