LevelOne GEL-1061, Руководство пользователя

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Chapter 13
| Basic Administration Protocols
LBD Configuration
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spanning tree protocol, general loopback detection cannot be enabled on the
same interface.
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When a loopback event is detected on an interface or when a interface is
released from a shutdown state caused by a loopback event, a trap message is
sent and the event recorded in the system log.
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Loopback detection must be enabled both globally and on an interface for
loopback detection to take effect.
Configuring Global
Settings for LBD
Use the Administration > LBD (Configure Global) page to enable loopback
detection globally, specify the interval at which to transmit control frames, the
interval to wait before releasing an interface from shutdown state, the response to
a detected loopback, and the traps to send.
Parameters
These parameters are displayed:
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Global Status – Enables loopback detection globally on the switch.
(Default: Enabled)
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Transmit Interval – Specifies the interval at which to transmit loopback
detection control frames. (Range: 1-32767 seconds; Default: 10 seconds)
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Recover Time – Specifies the interval to wait before the switch automatically
releases an interface from shutdown state. (Range: 60-1,000,000 seconds;
Default: 60 seconds)
When the loopback detection mode is changed, any ports placed in shutdown
state by the loopback detection process will be immediately restored to
operation regardless of the remaining recover time.
If the recover time is not enabled (checkbox unmarked), all ports placed in
shutdown state can be restored to operation using the Release button. To
restore a specific port, re-enable Admin status on the Configure Interface page.
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Action – Specifies the protective action the switch takes when a loopback
condition is detected. (Options: None, Shutdown; Default: Shutdown)
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None - No action is taken.
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Shutdown – When the response to a detected loopback condition is set to
shut down a port, and a port receives a control frame sent by itself, this
means that the port is in looped state, and the VLAN in the frame payload is
also in looped state with the wrong VLAN tag. The looped port is therefore
shut down.
When the loopback detection response is changed, any ports placed in
shutdown state by the loopback detection process will be immediately
restored to operation regardless of the remaining recover time.