Specifications

DGS-3024 Layer 2 Switch CLI Reference Manual
config stp
40 seconds. The default value is 20.
maxhops <value 1-20> - The number of hops between devices in a
spanning tree region before the BPDU (bridge protocol data unit)
packet sent by the Switch will be discarded. Each Switch on the hop
count will reduce the hop count by one until the value reaches zero.
The Switch will then discard the BPDU packet and the information held
for the port will age out. The user may set a hop count from 1 to 20.
The default is 20.
hellotime <value 1-10> − The user may set the time interval between
transmission of configuration messages by the root device in STP, or
by the designated router in RSTP, thus stating that the Switch is still
functioning. A time between 1 and 10 seconds may be chosen, with a
default setting of 2 seconds.
In MSTP, the spanning tree is configured by port and therefore, the
hellotime must be set using the configure stp ports command for
Switches utilizing the Multiple Spanning Tree Protocol.
forwarddelay <value 4-30> − The maximum amount of time (in
seconds) that the root device will wait before changing states. The user
may choose a time between 4 and 30 seconds. The default is 15
seconds.
txholdcount <value 1-10> - The maximum number of BPDU Hello
packets transmitted per interval. Default value = 3.
fbpdu [enable | disable] − Allows the forwarding of STP BPDU packets
from other network devices when STP is disabled on the Switch. The
default is enable.
lbd [enable | disable] – Enabling this feature temporarily block STP on
the Switch when a BPDU packet has been looped back to the switch.
When the Switch detects its own BPDU 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 LBD STP port will restart (change
to discarding state) when the LBD Recover Time times out. The
default is enabled.
lbd_recover_timer [0 | <value 60-1000000>] - This field will set the time
the STP port will wait before recovering the STP state set. 0 will denote
that the LBD will never time out or restart until the administrator
personally changes it. The user may also set a time between 60 and
1000000 seconds. The default is 60 seconds.
NOTE:
In MSTP, the spanning tree is configured by
port and therefore, the hellotime must be set using the
config stp ports command for switches utilizing the
Multiple Spanning Tree Protocol.
Restrictions Only administrator-level users can issue this command.
Example usage:
To configure STP with maxage 18 and maxhops of 15:
DGS-3024:4#config stp maxage 18 maxhops 15
Command: config stp maxage 18 maxhops 15
Success.
DGS-3024:4#
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