DES-3526 Layer 2 Fast Ethernet Switch
config stp mst_ports
Purpose
Used to update the port configuration for a MSTP instance.
Syntax
config stp mst_ports <portlist> instance_id <value 0-4>
{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 MAC address 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.
instance_id <value 0-4> -
Enter a numerical value between 0 and
4 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, with instance id 2, to have an auto internalCost and a priority of 16:
DES-3526:4#config stp mst_config_id ports 1-5 instance_id 2
internalCost auto priority 16
Command : config stp mst_config_id ports 1-5 instance_id 2
internalCost auto priority 16
Success.
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