xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual
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config stp
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
.
Restrictions
Only Administrator or Operator-level users can issue this command.
Example usage:
To configure STP with maxage 18 and maxhops of 15:
DES-3800:admin#config stp maxage 18 maxhops 15
Command: config stp maxage 18 maxhops 15
Success.
DES-3800:admin#
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] | 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. The beginning and
end of the port list range are separated by a dash. For example, 1-4
specifies all of the ports between port 1 and port 4.
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.
migrate [yes | no]
– Setting this parameter as “
yes
” will set the ports to
send out BPDU 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