Configuring Loopback Detection For An Ethernet Port - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Port Basic Configuration
Quidway S3900 Series Ethernet Switches-Release 1510
Link aggregation control protocol (LACP) configuration: includes LACP
enable/disable status;
QoS configuration: includes rate limit, port priority, and default 802.1p priority on
the port;
STP configuration: includes STP enable/disable status on the port, link attribute on
the port (point-to-point or non-point-to-point), STP priority, path cost, packet
transmission rate limit, whether loop protection is enabled, whether root protection
is enabled, and whether the port is an edge port;
Generic attribute registration protocol (GARP) configuration: includes GVRP
enable/disable status, timer settings, and registration mode;
Port configuration: includes link type of the port, port rate and duplex mode.
Table 1-9 Copy the configuration of a port to other ports
Operation
Enter system view
Copy
configuration of a
port to other ports
Note:
If you specify a source aggregation group ID, the system will use the port with the
smallest port number in the aggregation group as the source.
If you specify a destination aggregation group ID, the configuration of the source
port will be copied to all ports in the aggregation group and all ports in the group will
have the same configuration as that of the source port.

1.2.8 Configuring Loopback Detection for an Ethernet Port

Loopback detection is used to monitor if loopback occurs on a switch port.
After you enable loopback detection on Ethernet ports, the switch can monitor if
external loopback occurs on them. If there is a loopback port found, the switch will put it
under control.
If loopback is found on an access port, the system disables the port, sends a Trap
message to the client and removes the corresponding MAC forwarding entry.
If loopback is found on a trunk or hybrid port, the system sends a Trap message to
the client. When the loopback port control function is enabled on these ports, the
system disables the port, sends a Trap message to the client and removes the
corresponding MAC forwarding entry.
system-view
copy configuration source { interface-type
the interface-number
source-agg-id } destination { interface-list
[ aggregation-group destination-agg-id ] |
aggregation-group destination-agg-id }
Huawei Technologies Proprietary
1-8
Chapter 1 Port Basic Configuration
Command
| aggregation-group
Remarks
—
Required