HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 2 - LAN Switching Command Refer - Page 28

Do not configure this command on a port with MSTP enabled. Examples # Set the link-down event suppression interval to 8 seconds on interface Ten-GigabitEthernet 1/1/5. system-view [Sysname] interface ten-gigabitethernet 1/1/5 [Sysname-Ten-GigabitEthernet1/1/5] link-delay 8 loopback Use loopback to perform a loopback test on an Ethernet interface. Syntax loopback { external | internal } Views Ethernet interface view Predefined user roles network-admin Parameters external: Performs an external loopback test on the Ethernet interface. internal: Performs an internal loopback test on the Ethernet interface. Usage guidelines If an Ethernet interface does not operate correctly, you can perform a loopback test on it to identify the problem. An Ethernet interface in a loopback test does not forward data traffic. On a physically down interface (displayed as in DOWN state), you can only perform an internal loopback test, and an external loopback test will fail. On an administratively shut down interface (displayed as in ADM or Administratively DOWN state), you cannot perform an internal or external loopback test. The speed, duplex, and shutdown commands are not available during a loopback test. During a loopback test, the Ethernet interface operates in full duplex mode. When the loopback test is complete, the port returns to its duplex setting. Examples # Perform an internal loopback test on Ten-GigabitEthernet 1/1/5. system-view [Sysname] interface ten-gigabitethernet 1/1/5 [Sysname-Ten-GigabitEthernet1/1/5] loopback internal Loop internal succeeded! multicast-suppression Use multicast-suppression to enable multicast storm suppression and set the multicast storm suppression threshold. 21