13.
Rapid Spanning Tree Protocol (RSTP)
MN700004 Rev 01
130
RSTP Configuration Commands in Interface Configuration
Mode
rapid-spanning-tree all
The
rapid-spanning-tree all
command, in Interface Configuration mode, displays the current
status of rapid-spanning-tree parameters for all the switch’s logical interfaces. The command
is equivalent to the
rapid-spanning-tree interface all
command in Protocol Configuration
mode. See also Displaying Port Rapid-Spanning-Tree Topology Settings.
Command Syntax
device-name
(config-if
UU/SS/PP
)#
rapid-spanning-tree all
Example
device-name
(config-if 1/1/1)#
rapid-spanning-tree all
============================================================================
Port |Pri|State|PCost |DCost |Designated bridge | DPrt |FwrdT|DtctTc
-------+---+-----+------+------+------------------+--------+-----+--------
01/01/01128 listn 19 19
32768.00A012000003 128.01 2 Disabled
01/01/02128 block 19 0
32768.000002030405 128.63 0 Enabled
01/01/03128 listn 19 0
32768.000002030405 128.62 2 Enabled
rapid-spanning-tree edge-port
The
rapid-spanning-tree edge-port
command, in Interface Configuration mode, changes the
admin status. The
no
form of this command disables the admin status.
The
EdgePort
parameter is controlled by the RSTP state machine and the Command Line
Interface (CLI):
Admin EdgePort
The admin
EdgePort
parameter can be set by the CLI on a per-Port basis in order to
indicate that a given Port is permitted to transit directly to the Forwarding Port State when
a Port becomes
Designated
.
This functionality is provided in order to permit Bridge Ports that are (administratively)
known to be at the edge of the Bridged LAN to transition to Forwarding without delay.
However, as the presence of a Bridge on a Port that has been marked as an edge Port
could potentially cause a loop in the active topology, it is necessary to qualify the value of
the administrative state variable according to the port's knowledge of whether or not any
BPDUs have been received on the Port.
EdgePort
The Bridge Detection state machine controls the value of the corresponding
operational state variable, operational EdgePort, which may be used in order to
determine whether a port that becomes
Designated
is permitted to transit directly to
Forwarding. A value of
enabled
in the show commands indicates that this state transition