D-Link DMS-1100 User Manual - Page 69

L2 Features > STP > MST Configuration Identification, Hello Time

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D-Link DMS-1100 Series User Manual Guard Root Link Type Port Fast TCN Filter BPDU Forward Priority Hello Time STP is enabled globally on the Switch. Select to enable or disable the guard root function. Select the link type option. The options to choose from are Auto, P2P, and Shared. A full-duplex port is considered to have a point-to-point (P2P) connection. A half-duplex port is considered to have a Shared connection. The port cannot rapidly transition to the forwarding state if the link type is set to Shared. By default this option is Auto. Select the port fast option. The options are Disabled and Edge. In the Disabled mode, the port will always be in the non-port fast state. It will wait for the forward-time delay to change to the forwarding state. In the Edge mode, the port will directly change to the forwarding state without waiting for the forward-time delay. If the interface receives a BPDU, its operation state changes to the non-port fast state. Select to enable or disable the TCN filter option. Enabling TCN filtering on a port is useful for connecting to an external network, which may not be under full control of the administrator. When a port is set to the TCN filter mode, the topology change event received by the port will be ignored. By default, this option is disabled. Bridges use Bridge Protocol Data Units (BPDUs) in the operation of spanning tree, BPDU. Forwarding is useful when a bridge interconnects two regions, with each region requiring a separate spanning tree. BPDU filtering functions only when STP is disabled either globally or on a single interface. The possible field values are:  Disabled: BPDU filtering is enabled on the port.  Enabled: BPDU forwarding is enabled on the port (STP must be disabled). Select the priority of each port. Selectable range is from 0 to 240, and the default setting is 128. The lower the number, the greater the probability the port will be chosen as a root port. The interval between two transmissions of BPDU packets sent by the Root Bridge to indicate to all other switches that it is indeed the Root Bridge. The default value is 2. Table 4.48 Click Apply to make the configurations take effect. L2 Features > STP > MST Configuration Identification Multiple Spanning Tree (MSTP) provides various load balancing scenarios by allowing multiple VLANs to be mapped to a single spanning tree instance, providing multiple pathways across the network. For example, while port A is blocked in one STP instance, the same port can be placed in the Forwarding state in another STP instance. The MST Configuration Identification page is for defining global MSTP settings, including region names, MSTP revision level. 63

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D-Link DMS-1100 Series User Manual
63
STP is enabled globally on the Switch.
Guard Root
Select
to enable or disable the guard root function.
Link Type
Select
the link type option. The options to choose from are
Auto
,
P2P
,
and
Shared
. A full-duplex port is considered to have a point-to-point
(
P2P
) connection. A half-duplex port is considered to have a
Shared
connection. The port cannot rapidly transition to the forwarding state if
the link type is set to
Shared
. By default this option is
Auto
.
Port Fast
Select
the port fast option. The options are
Disabled
and
Edge
. In the
Disabled
mode, the port will always be in the non-port fast state. It will
wait for the forward-time delay to change to the forwarding state. In the
Edge
mode, the port will directly change to the forwarding state without
waiting for the forward-time delay. If the interface receives a BPDU, its
operation state changes to the non-port fast state.
TCN Filter
Select
to enable or disable the TCN filter option. Enabling TCN filtering
on a port is useful for connecting to an external network, which may not
be under full control of the administrator. When a port is set to the TCN
filter mode, the topology change event received by the port will be
ignored. By default, this option is disabled.
BPDU Forward
Bridges use Bridge Protocol Data Units (BPDUs) in the operation of
spanning tree, BPDU. Forwarding is useful when a bridge
interconnects two regions, with each region requiring a separate
spanning tree. BPDU filtering functions only when STP is disabled
either globally or on a single interface. The possible field values are:
Disabled:
BPDU filtering is enabled on the port.
Enabled:
BPDU forwarding is enabled on the port (STP must be
disabled).
Priority
Select the priority of each port. Selectable range is from 0 to 240, and
the default setting is 128. The lower the number, the greater the
probability the port will be chosen as a root port.
Hello Time
The interval between two transmissions of BPDU packets sent by the
Root Bridge to indicate to all other switches that it is indeed the Root
Bridge. The default value is 2.
Table 4.48
Click
Apply
to make the configurations take effect.
L2 Features > STP > MST Configuration Identification
Multiple Spanning Tree (MSTP) provides various load balancing scenarios by allowing multiple VLANs to be
mapped to a single spanning tree instance, providing multiple pathways across the network. For example,
while port A is blocked in one STP instance, the same port can be placed in the Forwarding state in another
STP instance.
The MST Configuration Identification page is for defining global MSTP settings, including region names,
MSTP revision level.