config stp mst_ports
Purpose Used to update the port configuration for a MSTP instance.
Syntax
config stp mst_ports <portlist> instance_id <value 0-15> {internalCost [auto | <value 1-
20000000>] `priority <value 0-240>}
Description This command will update the port configuration for a STP instance_id.If a loop occurs, the MSTP function will
use the port priority to select an interface to put into the forwarding state. Set a higher priority value for
interfaces to be selected for forwarding first. In instances where the priority value is identical, the MSTP
function will implement the lowest port number into the forwarding state and other interfaces will be blocked.
Remember that lower priority values mean higher priorities for forwarding packets.
Parameters <portlist> – Specifies a port or range of ports to be configured.The port list is specified by listing the lowest
switch number and the beginning port number on that switch, separated by a colon.Then the highest switch
number, and the highest port number of the range (also separated by a colon) are specified.The beginning and
end of the port list range are separated by a dash. For example, 1:3 specifies switch number 1, port 3. 2:4
specifies switch number 2, port 4. 1:3-2:4 specifies all of the ports between switch 1, port 3 and switch 2, port 4
– in numerical order.
instance_id <value 0-15> - Enter a numerical value between 0 and 15 to identify the instance_id previously
configured on the Switch.An entry of 0 will denote the CIST (Common and Internal Spanning Tree.
internalCost – This parameter is set to represent the relative cost of forwarding packets to specified ports when
an interface is selected within a STP instance.The default setting is auto.There are two options:
auto – Selecting this parameter for the internalCost will set quickest route automatically and optimally for an
interface.The default value is derived from the media speed of the interface.
value 1-2000000 – Selecting this parameter with a value in the range of 1-2000000 will set the quickest route
when a loop occurs.A lower internalCost represents a quicker transmission.
priority <value 0-240> – Enter a value between 0 and 240 to set the priority for the port interface.A higher
priority will designate the interface to forward packets first.A lower number denotes a higher priority.
Restrictions Only administrator-level users can issue this command.
Example usage:
To designate ports 1 through 5 on module one, with instance ID 2, to have an auto internalCost and a priority of 16:
AT-9724TS:4# config stp mst_config_id ports 1:1-1:5
instance_id 2 internalCost auto priority 16
Command: config stp mst_config_id ports 1:1-1:5
instance_id 2 internalCost auto priority 16
S u c c e s s .
A T - 9 7 2 4 T S : 4 #
74
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch • Command Line Interface Reference Manual
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