D-Link xStack DES-3810, Reference Manual

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xStack
®
DES-3810 Series Layer 3 Managed Ethernet Switch Web UI Reference Guide
100
The Spanning Tree Protocol (STP) operates on two levels:
1. On the switch level, the settings are globally implemented.
2. On the port level, the settings are implemented on a per-user-defined group of ports basis.
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 5-33 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