Operation Manual

Configuration Guide 100
Managing Physical Interfaces Configuration Examples
7.2.4 Using the CLI
Switch#configure
Switch(config)#interface ten-gigabitEthernet 1/0/1
Switch(config-if)#port isolation gi-forward-list 1/0/4
Switch(config-if)#end
Switch#copy running-config startup-config
Verify the Configuration
Switch#show port isolation interface
Port LAG Forward-List
---- --- ------------
Te1/0/1 N/A Te1/0/4
Te1/0/2 N/A Te1/0/1-28,Po1-14
Te1/0/3 N/A Te1/0/1-28,Po1-14
......
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.