Config Stp Ports - Allied Telesis AT-9724TS Reference Manual

config stp ports

Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure STP with path cost 19, hellotime set to 5 seconds, migration enable, and state enable for ports 1-5 of module 1:
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch • Command Line Interface Reference Manual
Used to setup STP on the port level.
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]
This command is used to create and configure STP for a group of ports.
<portlist> – Specifies a 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.
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.
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.
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 received it automatically loses edge port status. false indicates
that the port does not have edge port status.
p2p [true | false | auto] – true indicates a point-to-point (P2P) shared link. P2P ports are similar to edge ports
however they are restricted in that a P2P port must operate in full-duplex. Like edge ports, P2P ports transition
to a forwarding state rapidly thus benefiting from RSTP.A p2p value of false indicates that the port cannot have
p2p status.Auto allows the port to have p2p status whenever possible and operate as if the p2p status were
true. If the port cannot maintain this status (for example if the port is forced to half-duplex operation) the p2p
status changes to operate as if the p2p value were false.The default setting for this parameter is auto.
state [enable | disable] – Allows STP to be enabled or disabled for the ports specified in the port list.The default
is enable.
Only administrator-level users can issue this command.
AT-9724TS:4# config stp ports 1:1-1:5 externalCost 19
hellotime 5 migrate yes state enable
Command: config stp ports 1:1-1:5 externalCost 19
hellotime 5 migrate yes state enable
S u c c e s s .
A T - 9 7 2 4 T S : 4 #
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