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[Sysname] port-group manual group1

[Sysname-port-group-manual-group1] group-member gigabitethernet 1/0/1

loopback-detection action

Description

Use the loopback-detection action command to configure the action for loop protection on Ethernet

interfaces.

Use the undo loopback-detection action command to restore the default.

By default, a looped interface does not receive or send packets.

When you change the link type of an Ethernet interface by using the port link-type command, the switch

removes the protective action configured on the interface. For more information about the port link-type

command, see the chapter ―VLAN configuration commands.‖

Syntax

loopback-detection action { no-learning | semi-block | shutdown }

undo loopback-detection action

View

Layer 2 Ethernet interface view, port group view

Default level

2: System level

Parameters

no-learning: Disables MAC address learning on the interface.

semi-block: Blocks all packets but STP BPDUs.

shutdown: Shuts down the Ethernet interface. To bring up the interface again, use the undo shutdown

command.

Examples

# Configure the access port GigabitEthernet 1/0/1 to shut down when a loop is detected.

<Sysname> system-view

[Sysname] loopback-detection enable

[Sysname] interface gigabitethernet 1/0/1

[Sysname-GigabitEthernet1/0/1] loopback-detection enable

[Sysname-GigabitEthernet1/0/1] loopback-detection action shutdown

# Configure the trunk port GigabitEthernet 1/0/2 to shut down when a loop is detected.

<Sysname> system-view

[Sysname] loopback-detection enable

[Sysname] interface gigabitethernet 1/0/2

[Sysname-GigabitEthernet1/0/2] port link-type trunk

[Sysname-GigabitEthernet1/0/2] loopback-detection enable

[Sysname-GigabitEthernet1/0/2] loopback-detection control enable

[Sysname-GigabitEthernet1/0/2] loopback-detection action shutdown

HP A5830 Series Command Reference

Other manuals for HP A5830 Series