HP 5900 series Command Reference Manual: Loop Detection Commands

Layer 2 - lan switching.
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Loop detection commands

display loopback-detection
Use display loopback-detection to display the loop detection configuration and status.
Syntax
display loopback-detection
Views
Any view
Predefined user roles
network-admin
network-operator
Example
# Display the loop detection configuration and status.
<Sysname> display loopback-detection
Loopback detection is enabled.
Loopback detection interval is 30 second(s).
Loopback is detected on following interfaces:
Interface
Ten-GigabitEthernet1/0/1
Ten-GigabitEthernet1/0/2
Ten-GigabitEthernet1/0/3
Ten-GigabitEthernet1/0/4
Table 30 Command output
Field
Action mode
loopback-detection action
Use loopback-detection action to configure the loop protection action on a port.
Use undo loopback-detection action to restore the default.
Action mode
Block
Shutdown
None
No-learning
Description
Loop protection action:
Block—When a loop is detected on a port, the device generates a log,
disables the port from learning MAC addresses, and blocks inbound traffic on
the port.
None—When a loop is detected on a port, the device generates a log but
performs no action on the port.
No-learning—When a loop is detected on a port, the device generates a log
and disables the port from learning MAC addresses.
Shutdown—When a loop is detected on a port, the device generates a log and
shuts down the port to disable it from receiving and sending any frames.
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This manual also for:

5920 series

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