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DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Switch CLI Reference Manual
config stp
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.
Restrictions
Only administrator-level users can issue this command.
Example usage:
To configure STP with maxage 18 and maxhops of 15:
DES-3028P:4#config stp maxage 18 maxhops 15
Command: config stp maxage 18 maxhops 15
Success.
DES-3028P:4#
config stp ports
Purpose
Used to setup STP on the port level.
Syntax 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] | lbd [enable | disable] | fbpdu [enable |
disable]}
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.
1. 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.
2. <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
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