LevelOne GTL-2691 - Manual (Page 244)

C HAPTER 8 | Spanning Tree Algorithm
Configuring Loopback Detection
– 244 –
◆ The interface ceases to receive it’s own BPDUs in a forward delay
interval.
N OTE :
If loopback detection is not enabled and an interface receives it's
own BPDU, then the interface will drop the loopback BPDU according to
IEEE Standard 802.1w-2001 9.3.4 (Note 1).
N OTE :
Loopback detection will not be active if Spanning Tree is disabled on
the switch.
N OTE :
When configured for manual release mode, then a link down/up
event will not release the port from the discarding state.
CLI R EFERENCES
◆ "Editing VLAN Groups" on page 1113
P ARAMETERS
These parameters are displayed:
◆ Interface – Displays a list of ports or trunks.
◆ Status – Enables loopback detection on this interface.
(Default: Enabled)
◆ Trap – Enables SNMP trap notification for loopback events on this
interface. (Default: Disabled)
◆ Release Mode – Configures the interface for automatic or manual
loopback release. (Default: Auto)
◆ Release – Allows an interface to be manually released from discard
mode. This is only available if the interface is configured for manual
release mode.
W EB I NTERFACE
To configure loopback detection:
1. Click Spanning Tree, Loopback Detection.
2. Click Port or Trunk to display the required interface type.
3. Modify the required loopback detection attributes.
4. Click Apply