D-Link xStack DES-6500 Cli Manual page 92

xStack DES-6500 Modular Layer 3 Chassis Ethernet Switch CLI Manual
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config stp ports
Purpose Used to setup STP on the port level.
Syntax config stp ports <portlist> {externalCost [auto | <value 1-
200000000>] | hellotime <value 1-10> | migrate [yes | no] edge
[true | false] | p2p [true | false | auto ] | state [enable | disable] |
lbd [enable | disable]}
Description This command is used to create and configure STP for a group of
ports.
<portlist>  Specifies a range of ports to be displayed. The port list is
Parameters
specified by listing the lowest line card number and the beginning
port number on that line card, separated by a colon. Then the highest
line card 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
line card number 1, port 3. 2:4 specifies line card number 2, port 4.
1:3-2:4 specifies all of the ports between line card 1, port 3 and line
card 2, port 4  in numerical order.
externalCost  This defines a metric that indicates the relative cost of
forwarding packets to the specified port list. Port cost can be set
automatically or as a metric value. The default value is auto.
hellotime <value 1-10>  The time interval between transmission of
configuration messages by the designated port, to other devices on
the bridged LAN, thus stating that the Switch is still functioning. The
user may choose a time between 1 and 10 seconds. The default is 2
seconds.
migrate [yes | no] – Setting this parameter as "yes" will set the ports
to send out BDPU packets to other bridges, requesting information
on their STP setting If the Switch is configured for RSTP, the port will
be capable to migrate from 802.1d STP to 802.1w RSTP. If the
Switch is configured for MSTP, the port is capable of migrating from
802.1d STP to 802.1s MSTP. RSTP and MSTP can coexist with
standard STP, however the benefits of RSTP and MSTP are not
realized on a port where an 802.1d network connects to an 802.1w or
802.1s enabled network. Migration should be set as yes on ports
connected to network stations or segments that are capable of being
upgraded to 802.1w RSTP or 802.1s MSTP on all or some portion of
the segment.
edge [true | false] – true designates the port as an edge port. Edge
ports cannot create loops, however an edge port can lose edge port
status if a topology change creates a potential for a loop. An edge
port normally should not receive BPDU packets. If a BPDU packet is
 auto – Setting this parameter for the external cost will
automatically set the speed for forwarding packets to the
specified port(s) in the list for optimal efficiency. Default port
cost: 100Mbps port = 200000. Gigabit port = 20000.
 <value 1-200000000> - Define a value between 1 and
200000000 to determine the external cost. The lower the
number, the greater the probability the port will be chosen to
forward packets.
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