D-Link DAS-3636 Cli Reference Manual page 221

config stp ports
Description This command is used to create and configure STP for a group of ports.
Parameters <portlist> − Specifies a range of ports to be configured.
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 1-2> − 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 2 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-compatible to
802.1D RSTP. If the Switch is configured for MSTP, the port is capable of migrating from
802.1D STP-compatible to 802.1Q 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 802.1D-2004 or 802.1Q enabled network. Migration should be set as yes on
ports connected to network stations or segments that are capable of being upgraded to
802.1D-2004 RSTP or 802.1Q MSTP on all or some portion of the segment.
edge [true | false | auto] – 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.
Auto – Will indicate that the port will be able to automatically enable edge port status if
needed.
restricted_role [true | false] – If true causes the Port not to be selected as Root Port for the
CIST or any MSTI, even it has the best spanning tree priority vector. Such a Port will be
selected as an Alternate Port after the Root Port has been selected. This parameter should be
false by default. If set, it can cause lack of spanning tree connectivity. It is set by a network
administrator to prevent bridges external to a core region of the network influencing the
spanning tree active topology, possibly because those bridges are not under the full control of
the administrator.
restricted_tcn [true | false] – If true causes the Port not to propagate received topology change
notifications and topology changes to other Ports. This parameter should be false by default. If
set it can cause temporary loss of connectivity after changes in a spanning trees active
topology as a result of persistent incorrectly learned station location information. It is set by a
network administrator to prevent bridges external to a core region of the network, causing
address flushing in that region, possibly because those bridges are not under the full control
of the administrator or MAC_Operational for the attached LANs transitions frequently.
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.
fbpdu [enable | disable] − When enabled, this allows the forwarding of STP BPDU packets
from other network devices when STP is disabled in the specified ports. If users want to
enable Forwarding BPDU on a per port basis, the following settings must first be in effect: 1.
DAS-3600 Series Ethernet over VDSL Switch CLI Reference Manual
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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