H3C S7500E Series Command Reference

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Table 1-11 Actions taken upon detection of a loop condition
Actions
Port type
No protective action configured A protective action configured
Access port
 Put the port in controlled mode. The
port discards all incoming packets,
but still forwards outgoing traffic.
 Create traps.
 Delete all MAC address entries of
the port.
 Perform the configured protective
action.
 Create traps and log messages.
 Delete all MAC address entries of the
port.
Hybrid or trunk port
 Create traps.
 If loopback detection control is
enabled, set the port in controlled
mode. The port discards all
incoming packets, but still forwards
outgoing packets.
 Delete all MAC address entries of
the port.
 Create traps and log messages.
 If loopback detection control is
enabled, take the configured protective
action on the port.
 Delete all MAC address entries of the
port.
Related commands: loopback-detection control enable.
Examples
# Enable loopback detection on GigabitEthernet 2/0/1.
<Sysname> system-view
[Sysname] loopback-detection enable
[Sysname] interface gigabitEthernet 2/0/1
[Sysname-GigabitEthernet2/0/1] loopback-detection enable
loopback-detection interval-time
Syntax
loopback-detection interval-time time
undo loopback-detection interval-time
View
System view
Default Level
2: System level
Parameters
time: Sets the loopback detection interval in seconds, in the range 5 to 300.
Description
Use the loopback-detection interval-time command to set the loopback detection interval.
Use the undo loopback-detection interval-time command to restore the default loopback detection
interval.
The default loopback detection interval is 30 seconds.
Related commands: display loopback-detection.

H3C S7500E Series Specifications

General

Brand	H3C
Model	S7500E Series
Category	Switch
Language	English