Ethernet; Ethernet Port Loopback Detection Function; Configuring The Loopback Detection Function; Displaying And Maintaining The Loopback Detection Function - 3Com 8807 Configuration Manual

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Ethernet Port
Loopback Detection
Function
Configuring the
Loopback Detection
Function
Displaying and
Maintaining the
Loopback Detection
Function
E
THERNET
D
ETECTION
Use the following configuration tasks can enable the port loopback detection
function, configure the VLAN enabled with the loopback detection function (you
can configure up to 800 such VLANs) and set the interval for external loopback
detection on ports to check whether there exists a loop on each port or not. If a
loop is found on a port, the switch will give out a trap alarm and determine
whether performing Shutdown on this loop or not according to your
configuration.
Table 811 Configure the loopback detection function
Operation
Ether system view
Enable the global loopback
detection function
Enable the loopback detection
function in a VLAN
Set the time interval for
external loopback detection
on a port
Enter Ethernet port view
Enable the control function of
port loopback detection
Disable the port loopback
detection function
Display the port loopback
detection information
Execute the display command in any view to display the configuration
information of the loopback detection function and the detection results.
Table 812 Display and maintain the loopback detection function
Operation
Display loopback detection information
P L
ORT OOPBACK
Command
system-view
loopback-detection enable
loopback-detection enable
vlan { vlanlist | all }
loopback-detection
interval-time time
interface interface-type
interface-num
loopback-detection control
loopback-detection disable
display loopback-detection Display it in any view
Command
display loopback-detection
Remarks
-
Required
Required; (need to enable the
global loopback detection
function)
Optional; (need to enable the
global loopback detection
function)
-
Optional; (need to enable the
global loopback detection
function)
Optional; (need to enable the
global loopback detection
function)