xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch Web UI Reference Guide
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STP Bridge Global Settings
On this page the user can configure the STP bridge global parameters.
To view the following window, click L2 Features > Spanning Tree > STP Bridge Global Settings, as shown
below:
Figure 4-28 STP Bridge Global Settings window
The fields that can be configured are described below:
Parameter Description
STP State
Use the radio button to globally enable or disable STP.
STP Version
Use the pull-down menu to choose the desired version of STP:
STP - Select this parameter to set the Spanning Tree Protocol (STP) globally on the
Switch.
RSTP - Select this parameter to set the Rapid Spanning Tree Protocol (RSTP)
globally on the Switch.
MSTP - Select this parameter to set the Multiple Spanning Tree Protocol (MSTP)
globally on the Switch.
Forwarding BPDU This field can be Enabled or Disabled. When Enabled, it allows the forwarding of STP
BPDU packets from other network devices. The default is Disabled.
Bridge Max Age (6 – 40)
The Max Age 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. The user may choose a time between 6 and 40 seconds. The default
value is 20 seconds.
Bridge Hello Time (1 – 2) The Hello Time can be set from 1 to 2 seconds. This is the interval between two
transmissions of BPDU packets sent by the Root Bridge to tell all other switches that
it is indeed the Root Bridge. This field will only appear here when STP or RSTP is
selected for the STP Version. For MSTP, the Hello Time must be set on a port per
port basis. The default is 2 seconds.
Bridge Forward Delay
(4 – 30)
The Forward Delay can be from 4 to 30 seconds. Any port on the Switch spends this
time in the listening state while moving from the blocking state to the forwarding state.
The default is 15 seconds
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