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DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
564
57-13 clear spanning-tree detected-protocols
This command is used to restart the protocol migration.
clear spanning-tree detected-protocols [interface INTERFACE-ID]
Parameters
57-14 spanning-tree (interface configuration)
This command is used to enable the STP mode. Use no form to disable STP.
Example
This example shows how to configure bridge priority for the MSTP instance 2.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#spanning-tree mst 2 priority 0
Success
DXS-3600-32S(config)#
interface INTERFACE-ID (Optional) Specifies the port interface that will be triggered the detecting action. If no
option is specified, every port is affected by this command.
Default
None.
Command Mode
EXEC Mode.
Command Default Level
Level: 8
Usage Guideline
This configuration is only effective for RSTP version or MSTP mode. By issuing the
command Port protocol migrating state machine will be forced to SEND_RSTP state.
This action can be used to test whether all legacy bridges on a given LAN have been
removed. If there is no STP Bridge on the LAN, the port will be operated in the
configured mode, either in RSTP or MSTP mode. Otherwise, the port will be
operated in STP mode.
RSTP and MST have built-in compatibility mechanisms that allow them to interact
properly with other versions of IEEE spanning tree or other regions. For example, a
bridge running RSTP can send 802.1D BPDUs on one of its ports when it is
connected to a legacy bridge. An MST bridge can detect that a port is at the
boundary of a region when it receives a legacy BPDU or an MST BPDU that is
associated with a different region. These mechanisms are not always able to revert
to the most efficient mode. For example, an RSTP bridge that is designated for a
legacy 802.1D stays in 802.1D mode even after the legacy bridge has been removed
from the link. Similarly, an MST port assumes that it is a boundary port when the
bridges to which it is connected have joined the same region. To force the MST port
to renegotiate with the neighbors, enter the clear spanning-tree detected-protocol
command.
If you enter the clear spanning-tree detected-protocol command with no
arguments, the command is applied to every port of the switch.
Example
This example shows how to trigger the protocol migration event for port 1.
DXS-3600-32S#clear spanning-tree detected-protocols interface tenGigabitEthernet 1/0/1
Success
DXS-3600-32S#
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