Clear Spanning-Tree Detected-Protocols - D-Link DGS-6600-48T Cli Reference Manual

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clear spanning-tree detected-protocols

clear spanning-tree detected-protocols [ interface INTERFACE-ID ]
Syntax Description
interface
INTERFACE-ID
Default
Command Mode
Usage Guideline
Example
Switch# clear spanning-tree detected-protocols
CLI Reference Guide
To restart the protocol migration, use the clear spanning-tree detected-
protocol command.
(Optional) Specifies the port interface that will trigger the detecting action. If no
option is specified, every port is effected by this command.
None
Privileged EXEC.
This configuration is only effective for RSTP version or MSTP mode. By issuing
the command the 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 operate in the configured mode, either in RSTP or MSTP mode. Otherwise,
the port will operate 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 which it is connected to have joined the same
region. To force the MST port to renegotiate with the neighbors, enter the clear
spanning-tree detected-protocol command.
Entering the clear spanning-tree detected-protocol command with no
arguments, applies the command to every port of the switch.
This example shows how to trigger the protocol migration event for all ports:
clear spanning-tree detected-protocols
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