TP-Link T2600G-18TSTL-SG3216 T2600G-18TSUN V1 Configuration Guide - Page 135

Managing Physical Interfaces Configuration Examples 7.3 Example for Loopback Detection 7.3.1 Network Requirements As shown below, Switch A is a convergence-layer switch connecting several accesslayer switches. Loops can be easily caused in case of misoperation on the accesslayer 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 Switch A Gi1/0/1 Gi1/0/2 Gi1/0/3 Management Host Access-layer Switches Loop 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 Configuring SNMP & RMON. Here we introduce how to configure loopback detection and monitor the detection result on the management interface of the switch. Demonstrated with T2600G-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. Configuration Guide 105