Specifications

DGS-3048 Layer 2 Switch CLI Reference Manual
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config stp ports
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.
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.
Restrictions Only administrator-level users can issue this command.
Example usage:
To configure STP with path cost 19, hellotime set to 5 seconds and state enable for ports 1-5 of module 1.
DGS3048#config stp ports 1:1-1:5 externalCost 19 hellotime 5
state enable
Command: config stp ports 1:1-1:5 externalCost 19 hellotime 5
state enable
Success.