Clear Spanning-Tree Detected-Protocols - Cisco MWR 2941 Command Reference Manual

Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR

clear spanning-tree detected-protocols

To restart the protocol migration process, use the clear spanning-tree detected-protocols command in
privileged EXEC mode.
Syntax Description
interface
interface-type
interface-number
port-channel
pc-number
vlan
vlan-interface
Command Default
None
Command Modes
Privileged EXEC (#)
Command History Release
12.2(14)SX
12.2(17d)SXB
12.2(33)SRA
15.0(1)MR
Usage Guidelines
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-protocols command with no arguments, the command is
applied to every port of the Catalyst 6500 series switch.
OL-23890-01
clear spanning-tree detected-protocol [interface [interface-type interface-number | port-channel
pc-number | vlan vlan-interface]
(Optional) Specifies the interface
The type of interface for which you want to clear the detected spanning tree
protocol.
The number of the interface for which you want to clear the detected spanning
tree protocol.
Clears the detected spanning tree protocol for a port-channel.
Specifies the port channel interface. Range: 1 to 282.
Clears the detected spanning tree protocol for a VLAN.
Specifies the VLAN interface. Range: 1 to 4094.
Modification
Support for this command was introduced on the Supervisor Engine 720.
Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
This command was integrated into Cisco IOS Release 12.2(33)SRA.
This command was integrated into Cisco IOS Release 15.0(1)MR.
Cisco MWR 2941 Router Command Reference, Release 15.0(1)MR
clear spanning-tree detected-protocols
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