Example For Loopback Detection; Network Requirements; Configuration Scheme; Using The Gui - TP-Link T1600G Series Configuration Manual

Managing Physical Interfaces
7.3

Example for Loopback Detection

7.3.1 Network Requirements

As shown below, Switch A is a convergence-layer switch connecting several access-
layer switches. Loops can be easily caused in case of misoperation on the access-
layer switches. If there is a loop on an access-layer switch, broadcast storms will occur
on Switch A or even in the entire network, creating excessive traffic and degrading the
network performance.
To reduce the impacts of broadcast storms, users need to detect loops in the network via
Switch A and timely block the port on which a loop is detected.
Figure 7-8 Network Topology

7.3.2 Configuration Scheme

Enable loopback detection on ports 1/0/1-3 and configure SNMP to receive the
notifications. For detailed instructions about SNMP, refer to
Here we introduce how to configure loopback detection and monitor the detection result
on the management interface of the switch.
Demonstrated with T1600G-52TS, the following sections provide configuration procedure
in two ways: using the GUI and using the CLI.

7.3.3 Using the GUI

1) Choose the menu Switching > Port > Loopback Detection to load the configuration
page.
2) In the Global Config section, enable loopback detection and web refresh globally. Keep
the default parameters and click Apply.
Switch A
Gi1/0/1
Gi1/0/3
Gi1/0/2
Loop
Management Host
Access-layer Switches
Configuring SNMP &
Configuration Guide
Configuration Examples
RMON.
102