D-Link xStack DES-3528 Series Cli Reference Manual page 89

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch CLI Reference Guide
To set the Switch globally for the Multiple Spanning Tree Protocol (MSTP):
DES-3528:admin# config stp version mstp
Command: config stp version mstp
Success
DES-3528:admin#
config stp
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To configure STP with maxage 18 and maxhops of 15:
DES-3528:admin# config stp maxage 18 maxhops 15
Command: config stp maxage 18 maxhops 15
Success.
DES-3528:admin#
Used to setup STP, RSTP and MSTP on the Switch.
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] |
nni_bpdu_addr [dot1d | dot1ad]}(1)
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.
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 6 to 40. 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.
In MSTP, the spanning tree is configured by port and therefore, the
NOTE:
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 is 6.
fbpdu [enable | disable] − Allows the forwarding of STP BPDU packets from other network
devices when STP is disabled on the Switch. The default is disabled.
Only Administrator and Operator and Power-User-level users can issue this command.
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