Loopback detection configuration commands

Transcription

1 Contents Loopback detection configuration commands 1 display loopback-detection 1 loopback-detection action 2 loopback-detection enable 2 loopback-detection interval-time 3 i

2 Loopback detection configuration commands display loopback-detection display loopback-detection [ { begin exclude include } regular-expression ] Any view 1: Monitor level : Filters command output by specifying a regular expression. For more information about regular expressions, see Fundamentals Configuration Guide. begin: Displays the first line that matches the specified regular expression and all lines that follow. exclude: Displays all lines that do not match the specified regular expression. include: Displays all lines that match the specified regular expression. regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters. Use display loopback-detection to display the operating status of the loopback detection function. # Display the loopback detection operating status. <Sysname> display loopback-detection Loopback-detection is running. Detection interval is 30 second(s). Action mode: None Loopback-detection is enabled on the following VLAN(s): 1, 20, 315, 1001, 2008, , 2026 Loopback is detected on the following interface(s): GigabitEthernet4/0/1 GigabitEthernet4/0/2 Table 1 Command output Field Detection interval is 30 second(s) The loopback detection interval is 30 seconds. 1

3 Field Action mode Loopback detection action: None When detecting a looped port, the system prints log information and sends trap messages. Shutdown When detecting a looped port, the system prints log information, sends trap messages, and shuts down the port. After the port status detection timer (set by the shutdown-interval command) expires, the system will bring up the port. For more information about the port status detection timer, see Fundamentals Configuration Guide. loopback-detection action loopback-detection action { none shutdown } undo loopback-detection action System view none: Sets the loopback detection action to none. If you specify this keyword, the system only prints log information and sends trap messages when it detects a looped port. shutdown: Sets the loopback detection action to shutdown. If you specify this keyword, the system prints log information, sends trap messages, and shuts down the port to disable the port from sending and receiving packets (including loopback detection frames) when it detects a looped port. After the port status detection timer (set by the shutdown-interval command) expires, the system will bring up the port. Use loopback-detection action to configure the loopback detection action. Use undo loopback-detection action to restore the default. By default, the loopback detection action is none. # Set the loopback detection action to shutdown. [Sysname] loopback-detection action shutdown loopback-detection enable In system view: loopback-detection enable vlan { vlan-list all } 2

4 undo loopback-detection enable vlan { vlan-list all } In VLAN view: loopback-detection enable undo loopback-detection enable System view, VLAN view vlan-list: Specifies a list of existing VLANs, in the format of vlan-list = { vlan-id [ to vlan-id ] }&<1-10>, where vlan-id represents the VLAN ID in the range of 1 to 4094, and &<1-10> indicates you can specify up to 10 vlan-id [ to vlan-id ] parameters. all: Specifies all existing VLANs. Use loopback-detection enable to enable loopback detection. Use undo loopback-detection enable to disable loopback detection. By default, the loopback detection function is disabled. In system view, you can enable loopback detection for ports in multiple or all existing VLANs. In VLAN view, you can enable loopback detection only for ports in the VLAN. # Enable loopback detection for VLAN 10 through VLAN 100 in system view. [Sysname] loopback-detection enable vlan 10 to 100 # Enable loopback detection for VLAN 10 in VLAN view. [Sysname] vlan 10 [Sysname-vlan10] loopback-detection enable loopback-detection interval-time loopback-detection interval-time interval undo loopback-detection interval-time System view 3

5 interval: Specifies the loopback detection interval (in seconds) in the range of 1 to 300. Use loopback-detection interval-time to configure the loopback detection interval. Use undo loopback-detection interval-time to restore the default. By default, the loopback detection interval is 30 seconds. # Set the loopback detection interval to 10 seconds. [Sysname] loopback-detection interval-time 10 4