13.
Rapid Spanning Tree Protocol (RSTP)
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If Admin link-type is set to Auto, then the value of Operational link-type is determined in
accordance with the specific procedures defined for the switch entity concerned, as defined in
Admin link-type (auto).
If these procedures determine that the switch entity is connected to a point-to-point
LAN segment, then Operational link-type is set to point-to-point, otherwise it is set to
Shared
.
In the absence of a specific definition of how to determine whether the switch is connected to
a point-to-point LAN segment or not, the value of link-type shall be
Shared
.
point-to-point mac
NOT a point-to-point mac
Command Syntax
device-name
(config-if
UU/SS/PP
)#
rapid-spanning-tree link-type
{
auto
|
point-
to-point
|
shared
}
device-name
(config-if
UU/SS/PP
)#
no rapid-spanning-tree link-type
Argument Description
auto
Indicates that the link type status is chosen dynamically according to the link state.
point-to-
point
Indicates that the configured interface is connected to one switch, which runs RSTP.
In point to point rapid, transition to Forwarding state is allowed in certain cases.
shared
Indicates that the interface is not connected to a single switch that is running RSTP.
rapid-spanning-tree path-cost
The
rapid-spanning-tree path-cost
command, in Interface Configuration mode, sets the
RSTP port path-cost for the configured interface. The
no
form of this command resets the
default path-cost (see table 13-1).
Command Syntax
device-name
(config-if UU/SS/PP)#
rapid-spanning-tree path-cost
<
1-200000000
>