Specifications

8-152 set mstp cist port Rapier Switch Software Reference
Software Release 2.7.3
C613-03098-00 REV A
set mstp cist port
Syntax SET MSTp CIST POrt={port-list|ALL} [PRIOrity=0..255]
[EXTPathcost=extPathCost] [INTPathcost=intPathCost]
[EDGEport={YES|NO|ON|OFF|True|False}]
[POINttopoint={YES|NO|ON|OFF|True|False|Auto}]
where:
■ port-list is a port number, range (specified as n-m), or comma-separated list
of port numbers and/or ranges. Port numbers start at 1 and end at m,
where m is the highest numbered Ethernet switch port, including uplink
ports.
■ extPathcost is a value in the range 1 to 200,000,000
■ intPathcost is a value from 1 to 200,000,000
Description This command sets the common internal spanning tree (CIST) tuning
parameters for the specified ports. Modifying parameters for a switch port will
force a recalculation of the CIST port rules.
The parameters assigned for the specified ports will affect the network
topology of only the CIST, and will not affect the topology other spanning tree
instances on the switch.
The port parameter specifies a list of ports to be configured for the CIST. If all is
specified, then all of the ports will be configured according to the new
parameters for the CIST.
The priority parameter sets the value of the priority field contained in the port
identifier. The MST algorithm uses the port priority when determining the root
port for the switch in the CIST. The port with the lowest value is considered to
have the highest priority and will be chosen as root port over a port -
equivalent in all other aspects - but with a higher priority value. Any value in
the range 0 to 255 can be entered, but the switch will round the entered value
down to the nearest multiple of 16 (for example, if 17 is entered, 16 will be
used). The default value is 128. See Table 8-28 on page 8-156.
The extpathcost parameter sets the external path cost for the ports. This
parameter specifies a port’s contribution to the cost of a path to the region
containing the CIST root via that port. It applies when the port is a root port.
The intpathcost parameter sets the internal path cost for the ports. This
parameter specifies a port’s contribution to the cost of a path to the CIST
regional root via that port. It applies when the port is a root port.
If the extpathcost or the intpathcost is not explicitly set by the user, or the
default values have been restored to the port, then the default value for the
port will vary as the speed of the port varies, See Table 8-29 on page 8-156.
However, deleting an existing extpathcost or intpathcost value will not re-
apply the "no value" condition. To re-apply the "no value" condition, enter the
word "default."
The edgeport parameter specifies whether or not the port is an edge port. An
edge port is a one that attaches to a LAN that is known to have no other
bridges attached. If no is specified, then the port is not considered to be an edge
port. The values no, off and false are equivalent. If yes is specified, then the
port is considered to be an edge port. The values yes, on, and true are