xStack DGS-3400 Series Layer 2 Gigabit Managed Switch CLI Manual
config stp ports
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
.
lbd [enable | disable]
– When this is enabled, the Switch will temporarily block
STP on the port when a BDPU packet has been looped back. If the Switch
detects its own BDPU packet coming back, it signifies a loop on the network.
STP will automatically be blocked and an alert will be sent to the
administrator. The default is
disable
.
Restrictions Only
administrator-level users can issue this command.
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.
DGS-3400:4#config stp ports 1-5 externalCost 19 hellotime 5 migrate yes state enable
Command: config stp ports 1-5 externalCost 19 hellotime 5 migrate yes state enable
Success.
DGS-3400:4#
create stp instance_id
Purpose
Used to create a STP instance ID for MSTP.
Syntax
create stp instance_id <value 1-15>
Description
This command allows the user to create a STP instance ID for the Multiple
Spanning Tree Protocol. There are 16 STP instances on the Switch (one
internal CIST, unchangeable) and the user may create up to 15 instance IDs
for the Switch.
Parameters
<value 1-15> -
Enter a value between 1 and 15 to identify the Spanning Tree
instance on the Switch.
Restrictions Only
administrator-level users can issue this command.
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