Managing Physical Interfaces
Loopback Detection Configuration
Configuration Guide
93
Step 3
loopback-detection interval
interval-time
Set the interval of sending loopback detection packets which is used to detect the loops in
the network.
interval-time
:
The interval of sending loopback detection packets. The valid values are from
1 to 1000 seconds. By default, the value is 30 seconds.
Step 4
loopback-detection recovery-time
recovery-time
Set the recovery time, after which the blocked port in Auto Recovery mode can
automatically recover to normal status.
recovery-time
: It is integral times of detection interval, ranging from 1 to 100. The default
value is 3.
Step 5
interface {
fastEthernet
port
|
range fastEthernet
port-list
|
gigabitEthernet
port
|
range
gigabitEthernet
port-list
}
Enter interface configuration mode.
Step 6
loopback-detection
Enable loopback detection of the port. By default, it is disabled.
Step 7
loopback-detection config [ process-mode {
alert | port-based
} ] [ recovery-mode {
auto
| manual
} ]
Set the process mode when a loopback is detected on the port. There are two modes:
alert
:
The switch will only display alerts when a loopback is detected. It is the default setting.
port-based
: In addition to displaying alerts, the switch will block the port on which the loop
is detected.
Set the recovery mode for the blocked port. There are two modes:
auto
: After the recovery time, the blocked port will automatically recover to normal status
and restart to detect loops in the network.
manual
: The blocked port can only be released manually. You can use the command
‘loopback-detection recover’ to recover the blocked port to normal status.
Step 9
show loopback-detection global
Verify the global configuration of Loopback Detection.
Step 10
show loopback-detection interface {
fastEthernet
port
|
gigabitEthernet
port
}
Verify the Loopback Detection configuration of the specified port.
Step 11
end
Return to privileged EXEC mode.
Step 12
copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable loopback detection globally (keeping the
default parameters):
Switch#configure
Switch(config)#loopback-detection
Summary of Contents for T2500G-10MPS
Page 1: ...User Guide T2500G 10MPS 1910012405 REV1 0 1 April 2018...
Page 24: ...Using the CLI 767 Appendix Default Parameters 773...
Page 145: ...Part 5 Monitoring Traffic CHAPTERS 1 Traffic Monitor 2 Appendix Default Parameters...
Page 172: ...Part 7 Configuring DDM CHAPTERS 1 Overview 2 DDM Configuration 3 Appendix Default Parameters...
