xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual
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config stp
Bridge, the Switch will start sending its own BPDU to all other
switches for permission to become the Root Bridge. If it turns out
that your switch has the lowest Bridge Identifier, it will become the
Root Bridge. The user may choose a time between 6 and 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 BDPU 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 BDPU 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-level users can issue this command.
Example usage:
To configure STP with maxage 18 and maxhops of 15:
DES-3800:4#config stp maxage 18 maxhops 15
Command: config stp maxage 18 maxhops 15
Success.
DES-3800:4#
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]
Description
This command is used to create and configure STP for a group of
ports.