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DES-3500 Layer 2 Fast Ethernet Switch CLI Reference Manual
78
config stp version
Protocol (MSTP) globally on the Switch.
rstp - Selecting this parameter will set the Rapid Spanning Tree Protocol
(RSTP) globally on the Switch.
stp - Selecting this parameter will set the Spanning Tree Protocol (STP)
globally on the Switch.
Restrictions Only Administrator and Operator-level users can issue this command.
Example usage:
To set the Switch globally for the Multiple Spanning Tree Protocol (MSTP):
DES-3526:admin#config stp version mstp
Command: config stp version mstp
STP settings will return to default.
Are you sure to change the STP version?(y/n)
DES-3526:admin#
config stp
Purpose Used to setup STP, RSTP and MSTP on the Switch.
Syntax
config stp {maxage <value 6-40> | maxhops <value 6-40> | hellotime
<value 1-2> | forwarddelay <value 4-30>| txholdcount <value 1-10> |
fbpdu [enable | disable]}
Description This command is used to setup the Spanning Tree Protocol (STP) for the
entire Switch. All commands here will be implemented for the STP
version that is currently set on the Switch.
Parameters
maxage <value 6-40> − This value may be set to ensure that old
information does not endlessly circulate through redundant paths in the
network, preventing the effective propagation of the new information. Set
by the Root Bridge, this value will aid in determining that the Switch has
spanning tree configuration values consistent with other devices on the
bridged LAN. If the value ages out and a BPDU has still not been
received from the Root 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 6-40> - 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 1-2> − The user may set the time interval between
transmission of configuration messages by the root device, thus stating
that the Switch is still functioning. A time between 1 and 2 seconds may
be chosen, with a default setting of 2 seconds.
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.
NOTE:
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.