HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 2 - LAN Switching Command Refer - Page 148

Use undo loopback-detection enable to disable loop detection on a port. Syntax loopback-detection enable vlan { vlan-list | all } undo loopback-detection enable vlan { vlan-list | all } Default The loop detection function is disabled on ports. Views Ethernet interface view, aggregate interface view Predefined user roles network-admin Parameters vlan-list: Specifies a VLAN list, in the format of { vlan-id [ to vlan-id ] }&, where vlan-id represents the VLAN ID in the range of 1 to 4094, and & indicates that you can specify up to 10 vlan-id [ to vlan-id ] parameters. all: Specifies all existing VLANs. Usage guidelines Use this command to enable loop detection on specific ports. The port-specific configuration takes effect only after you enable loop detection globally. To enable loop detection globally, use the loopback-detection global enable command. The global configuration applies to all ports in the specified VLAN. The per-port configuration applies to the individual port only when the port belongs to the specified VLAN. The per-port configuration takes precedence over the global configuration. Example # Enable loop detection on port Ten-GigabitEthernet 1/1/5 for VLAN 10 through VLAN 20. system-view [Sysname] interface ten-gigabitethernet 1/1/5 [System-Ten-GigabitEthernet1/1/5] loopback-detection enable vlan 10 to 20 Related commands • display loopback-detection • loopback-detection global enable loopback-detection global action Use loopback-detection global action to configure the global loop protection action. Use undo loopback-detection global action to restore the default. Syntax loopback-detection global action shutdown undo loopback-detection global action Default When the device detects a loop on a port, it generates a log but performs no action on the port. 141