Loopback-Detection Enable - Alcatel OS-LS-6224 User Manual

4
Command Line Interface
loopback-detection interval
show loopback-detection

loopback-detection enable

The loopback-detection enable Interface Configuration mode command enables
the Loopback Detection feature on an interface. Use the no form of this command to
disable the Loopback Detection feature on an interface.
Syntax
loopback-detection enable
no loopback-detection enable
Default Setting
Loopback detection is disabled.
Command Mode
Interface Configuration mode
Command Usage
Use this command to enable or disable the Loopback Detection feature
globally. Use the loopback-detection enable Global Configuration mode
command to enable or disable Loopback Detection globally.
Loopback detection packets are sent only if the spanning tree state of the
interface is Forwarding.
If the Spanning tree mode is MSTP, then Loopback Detection packets are not
sent if STP is enabled on the interface.
If the interface is not a VLAN member in its PVID, Loopback Detection packets
are not sent for that interface.
If the interface is configured with "Admit tag only", Loopback detection packets
are not sent for that interface.
Loopback detection packets are subject to the user's MAC ACLs. That is, a
Loopback detection packet can be discarded by an explicit deny rule, and by
implicit "deny all" rule.
Examples
The following example enables Loopback detection on Ethernet port 1/e16.
Console(config)# interface ethernet 1/e16
Console(config-if)# loopback-detection enable
Related Commands
loopback-detection enable
loopback-detection mode
loopback-detection interval
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