Mst Configuration Table - D-Link DES-3526 User Manual

xStack DES-3526 / DES-3526DC Layer 2 Stackable Fast Ethernet Managed Switch User Manual
Max Hops
TX Hold Count
Forwarding BPDU
Loop Back Guard
LBD Recover Time
Configuration Name
Revision Level
Click Apply to implement changes made.

MST Configuration Table

The following screens in the MST Configuration Table window allow the user to configure a MSTI instance on the Switch.
These settings will uniquely identify a multiple spanning tree instance set on the Switch. The Switch initially possesses one CIST
or Common Internal Spanning Tree of which the user may modify the parameters for but cannot change the MSTI ID for, and
cannot be deleted. To view the Current MST Configuration Identification window, click Configuration > Spanning Tree >
MST Configuration Table:
The window above contains the following information:
Parameter
Configuration Name
Used to set 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 BPDU 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.
Used to set the maximum number of Hello packets transmitted per interval. The count
can be specified from 1 to 10. The default is 3.
This field can be Enabled or Disabled. When Enabled, it allows the forwarding of STP
BPDU packets from other network devices. The default is Enabled.
This feature is used to temporarily block STP on the Switch when a BDPU packet has
been looped back to the switch. When the Switch detects its own BDPU packet
coming back, it signifies a loop on the network. STP will automatically be blocked and
an alert will be sent to the administrator. The LBD STP port will restart (change to
discarding state) when the LBD Recover Time times out. The user may enable or
disable this function using the pull-down menu. The default is enabled.
This field will set the time the STP port will wait before recovering the STP state set. 0
will denote that the LBD will never time out or restart until the adminstrator personally
changes it. The user may also set a time between 60 and 1000000 seconds. The
default is 60 seconds.
MST Configuration Identification
Enter an alphanumeric string of up to 32 characters to uniquely identify the MSTP
region on the Switch. This Configuration Name, along with the Revision Level value
will identify the MSTP region configured on the Switch. If no name is entered, the
default name will be the MAC address of the device. This field is only valid when
MSTP is the version of STP globally set on the Switch.
Enter a number between 0 and 65535 to identify the MSTP region. This value, along
with the name will identify the MSTP region configured on the Switch. The default
setting is 0. This field is only valid when MSTP is the version of STP globally set on
the Switch.
Figure 6- 24. Current MST Configuration Identification window
Description
A previously configured name set on the Switch to uniquely identify the MSTI (Multiple
Spanning Tree Instance). If a configuration name is not set, this field will show the MAC
address to the device running MSTP. This field can be set in the STP Bridge Global Settings
window.
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